SODIUM HYDROSULFIDE
Chemwatch Material Safety Data Sheet
Issue Date: 10-Aug-2005 CHEMWATCH 2318
NC317TCP Version No:3
CD 2007/3 Page 1 of 14
Section 1 - CHEMICAL PRODUCT AND COMPANY IDENTIFICATION
PRODUCT NAME
SODIUM HYDROSULFIDE
SYNONYMS
H-Na-S, NaHS, "sodium hydrogen sulfide", "sodium sulfide", "sodium bisulphide", "sodium
mercaptan", "sodium mercaptide", "sodium sulfylhydrate", "hydrogen sodium sulphide",
"hydrogen sodium sulfide", "sodium hydrosulphide trihydrate", "sodium hydrosulfide
dihydrate"
PROPER SHIPPING NAME
SODIUM HYDROSULPHIDE with less than 25% water of crystallization
PRODUCT USE
Used as an analytical chemical; in paper dyestuffs, dehairing hides, mineral ore
treatment; bleaching reagent; in the manufacture of many thio compounds; desulfurising
cellophane and viscose rayon.
SUPPLIER
Company: Quantum Chemicals Pty Ltd
Address:
70 Quantum Close
Dandenong South
Victoria 3175
Telephone: 03 8795 8000
Emergency Tel: 1300 131 001
Fax: 03 8795 8099
HAZARD RATINGS
Flammability
Toxicity
Body Contact
Reactivity
Chronic
SCALE: Min/Nil=0 Low=1 Moderate=2 High=3 Extreme=4
SODIUM HYDROSULFIDE
Chemwatch Material Safety Data Sheet
Issue Date: 10-Aug-2005 CHEMWATCH 2318
NC317TCP Version No:3
CD 2007/3 Page 2 of 14
Section 2 - HAZARDS IDENTIFICATION
STATEMENT OF HAZARDOUS NATURE
HAZARDOUS SUBSTANCE. DANGEROUS GOODS. According to the Criteria of NOHSC,
and the ADG Code.
POISONS SCHEDULE
None
RISK SAFETY
May cause fire. Do not breathe dust.
Flammable. Wear eye/ face protection.
Spontaneously flammable in air. Use only in well ventilated areas.
Irritating to eyes and respiratory system. Keep container in a well ventilated place.
Inhalation skin contact and/or ingestion may To clean the floor and all objects contaminated
produce health damage*. by this material use water.
Cumulative effects may result following Take off immediately all contaminated clothing.
exposure*.
May produce skin discomfort*. In case of contact with eyes rinse with plenty
of water and contact Doctor or Poisons
Information Centre.
* (limited evidence). If swallowed IMMEDIATELY contact Doctor or
Poisons Information Centre (show this container
or label).
This material and its container must be disposed
of as hazardous waste.
Section 3 - COMPOSITION / INFORMATION ON INGREDIENTS
NAME CAS RN %
sodium hydrosulfide 16721-80-5 >95
Reacts with moist air/water to form
hydrogen sulfide 7783-06-4
and
sodium hydroxide 1310-73-2
Section 4 - FIRST AID MEASURES
SWALLOWED
路 For advice, contact a Poisons Information Centre or a doctor at once.
路 Urgent hospital treatment is likely to be needed.
路 If swallowed do NOT induce vomiting.
路 If vomiting occurs, lean patient forward or place on left side (head-down position, if
possible) to maintain open airway and prevent aspiration.
路 Observe the patient carefully.
路 Never give liquid to a person showing signs of being sleepy or with reduced awareness;
i.e. becoming unconscious.
路 Give water to rinse out mouth, then provide liquid slowly and as much as casualty can
SODIUM HYDROSULFIDE
Chemwatch Material Safety Data Sheet
Issue Date: 10-Aug-2005 CHEMWATCH 2318
NC317TCP Version No:3
CD 2007/3 Page 3 of 14
Section 4 - FIRST AID MEASURES
comfortably drink.
路 Transport to hospital or doctor without delay.
EYE
If this product comes in contact with the eyes:
路 Immediately hold eyelids apart and flush the eye continuously with running water.
路 Ensure complete irrigation of the eye by keeping eyelids apart and away from eye and
moving the eyelids by occasionally lifting the upper and lower lids.
路 Continue flushing until advised to stop by the Poisons Information Centre or a doctor,
or for at least 15 minutes.
路 Transport to hospital or doctor without delay.
路 Removal of contact lenses after an eye injury should only be undertaken by skilled
personnel.
SKIN
If skin or hair contact occurs:
路 Immediately flush body and clothes with large amounts of water, using safety shower if
available.
路 Quickly remove all contaminated clothing, including footwear.
路 Wash skin and hair with running water. Continue flushing with water until advised to
stop by the Poisons Information Centre.
路 Transport to hospital, or doctor.
INHALED
路 If fumes or combustion products are inhaled remove from contaminated area.
路 Lay patient down. Keep warm and rested.
路 Prostheses such as false teeth, which may block airway, should be removed, where
possible, prior to initiating first aid procedures.
路 Apply artificial respiration if not breathing, preferably with a demand valve
resuscitator, bag-valve mask device, or pocket mask as trained. Perform CPR if necessary.
路 Transport to hospital, or doctor, without delay.
NOTES TO PHYSICIAN
For exposures involving sulfides and hydrogen sulfide (including gastric acid
decomposition products of alkaline sulfides):
路 Hydrogen sulfide anion produces its major toxic effect through inhibition of cytochrome
oxidases.
路 Symptoms include profuse salivation, nausea, vomiting and diarrhea. Central nervous
effects may include giddiness, headache, vertigo, amnesia, confusion and unconsciousness.
Tachypnoea, palpitations, tachycardia, arrhythmia, sweating, weakness and muscle cramps
may also indicate overexposure.
Treatment involves:
路 If respirations are depressed, application of artificial respiration, administration of
oxygen (continue after spontaneous breathing is established).
路 For severe poisonings administer amyl nitrite and sodium nitrite (as for cyanide
poisoning) but omit sodium thiosulfate injection.
路 Atropine sulfate (0.6 mg intramuscularly) may contribute symptomatic relief.
路 Conjunctivitis may be relieved by installation of 1 drop of olive-oil in each eye and
sometimes by 3 drops of epinephrine solution (1:1000) at frequent intervals. Occasionally
local anesthetics and hot and cold compresses are necessary to control pain.
路 Antibiotics at first hint of pulmonary infection.
[Gosselin etal, Clinical Toxicology of Commercial Products].
Section 5 - FIRE FIGHTING MEASURES
EXTINGUISHING MEDIA
路 Foam.
路 Dry chemical powder.
SODIUM HYDROSULFIDE
Chemwatch Material Safety Data Sheet
Issue Date: 10-Aug-2005 CHEMWATCH 2318
NC317TCP Version No:3
CD 2007/3 Page 4 of 14
Section 5 - FIRE FIGHTING MEASURES
路 BCF (where regulations permit).
路 Carbon dioxide.
路 Water spray or fog - Large fires only.
FIRE FIGHTING
路 Alert Fire Brigade and tell them location and nature of hazard.
路 May be violently or explosively reactive.
路 Wear full body protective clothing with breathing apparatus.
路 Prevent, by any means available, spillage from entering drains or water course.
路 If safe, switch off electrical equipment until vapour fire hazard removed.
路 Use water delivered as a fine spray to control fire and cool adjacent area.
路 Avoid spraying water onto liquid pools.
路 DO NOT approach containers suspected to be hot.
路 Cool fire exposed containers with water spray from a protected location.
路 If safe to do so, remove containers from path of fire.
FIRE/EXPLOSION HAZARD
Flammable solid.
Avoid creating dust - may present dust explosion hazard. Dry dust can be
electrostatically charged by turbulence, pneumatic transport, pouring, in exhaust
ducts and during transport. Build-up of electrostatic charge may be prevented by
grounding.
FIRE INCOMPATIBILITY
Avoid contamination with oxidising agents i.e. nitrates, oxidising acids, chlorine
bleaches, pool chlorine etc. as ignition may result.
HAZCHEM: 2X
Personal Protective Equipment
Gas tight chemical resistant suit.
Section 6 - ACCIDENTAL RELEASE MEASURES
EMERGENCY PROCEDURES
MINOR SPILLS
路 Clean up all spills immediately.
路 Avoid breathing vapours and contact with skin and eyes.
路 Control personal contact by using protective equipment.
路 Contain and absorb spill with sand, earth, inert material or vermiculite.
路 Wipe up.
路 Place in a suitable labelled container for waste disposal.
MAJOR SPILLS
路 Clear area of personnel and move upwind.
路 Alert Fire Brigade and tell them location and nature of hazard.
路 Wear breathing apparatus plus protective gloves.
路 Prevent, by any means available, spillage from entering drains or water course.
路 No smoking, naked lights or ignition sources.
路 Increase ventilation.
路 Stop leak if safe to do so.
路 Water spray or fog may be used to disperse / absorb vapour.
路 Contain spill with sand, earth or vermiculite.
路 Use only spark-free shovels and explosion proof equipment.
路 Collect recoverable product into labelled containers for recycling.
路 Absorb remaining product with sand, earth or vermiculite.
路 Collect solid residues and seal in labelled drums for disposal.
路 Wash area and prevent runoff into drains.
SODIUM HYDROSULFIDE
Chemwatch Material Safety Data Sheet
Issue Date: 10-Aug-2005 CHEMWATCH 2318
NC317TCP Version No:3
CD 2007/3 Page 5 of 14
Section 6 - ACCIDENTAL RELEASE MEASURES
路 If contamination of drains or waterways occurs, advise emergency services.
PROTECTIVE ACTIONS FOR SPILL
PROTECTIVE ACTION ZONE
half
evacuation
downwind
direction
distance
down wind distance
wind isolation
distance
direction
half
evacuation downwind
INITIAL direction distance
ISOLATION
ZONE
From IERG (Canada/Australia)
Isolation Distance 50 metres
Downwind Protection Distance 250 metres
IERG Number 23
FOOTNOTES
1 PROTECTIVE ACTION ZONE is defined as the area in which people are at risk of harmful exposure. This zone
assumes that random changes in wind direction confines the vapour plume to an area within 30 degrees on
either side of the predominant wind direction, resulting in a crosswind protective action distance equal
to the downwind protective action distance.
2 PROTECTIVE ACTIONS should be initiated to the extent possible, beginning with those closest to the spill
and working away from the site in the downwind direction. Within the protective action zone a level of
vapour concentration may exist resulting in nearly all unprotected persons becoming incapacitated and
unable to take protective action and/or incurring serious or irreversible health effects.
3 INITIAL ISOLATION ZONE is determined as an area, including upwind of the incident, within which a high
probability of localised wind reversal may expose nearly all persons without appropriate protection to
life-threatening concentrations of the material.
4 SMALL SPILLS involve a leaking package of 200 litres (55 US gallons) or less, such as a drum (jerrican or
box with inner containers). Larger packages leaking less than 200 litres and compressed gas leaking from
a small cylinder are also considered "small spills".
LARGE SPILLS involve many small leaking packages or a leaking package of greater than 200 litres, such as
a cargo tank, portable tank or a "one-tonne" compressed gas cylinder.
5 Guide 135 is taken from the US DOT emergency response guide book.
6 IERG information is derived from CANUTEC - Transport Canada.
EMERGENCY RESPONSE PLANNING GUIDELINES (ERPG)
The maximum airborne concentration below which it is believed that nearly all individuals could be exposed
for up to one hour WITHOUT experiencing or developing
life-threatening health effects is:
sodium hydrosulfide 6 mg/m鲁
irreversible or other serious effects or symptoms which could impair an individual's ability to take
protective action is:
sodium hydrosulfide 1 mg/m鲁
other than mild, transient adverse effects without perceiving a clearly defined odour is:
sodium hydrosulfide 0 mg/m鲁
The threshold concentration below which most people will experience no appreciable risk of health effects:
sodium hydrosulfide 0 mg/m鲁
American Industrial Hygiene Association (AIHA)
SODIUM HYDROSULFIDE
Chemwatch Material Safety Data Sheet
Issue Date: 10-Aug-2005 CHEMWATCH 2318
NC317TCP Version No:3
CD 2007/3 Page 6 of 14
Section 6 - ACCIDENTAL RELEASE MEASURES
Ingredients considered according to the following cutoffs
Very Toxic (T+) >= 0.1% Toxic (T) >= 3.0%
R50 >= 0.25% Corrosive (C) >= 5.0%
R51 >= 2.5%
else >= 10%
where percentage is percentage of ingredient found in the mixture
Personal Protective Equipment advice is contained in Section 8 of the MSDS.
Section 7 - HANDLING AND STORAGE
PROCEDURE FOR HANDLING
路 Avoid all personal contact, including inhalation.
路 Wear protective clothing when risk of exposure occurs.
路 Use in a well-ventilated area.
路 WARNING: To avoid violent reaction, ALWAYS add material to water and NEVER water to
material.
路 Avoid smoking, naked lights or ignition sources.
路 Avoid contact with incompatible materials.
路 When handling, DO NOT eat, drink or smoke.
路 Keep containers securely sealed when not in use.
路 Avoid physical damage to containers.
路 Always wash hands with soap and water after handling.
路 Work clothes should be laundered separately. Launder contaminated clothing before re
-use.
路 Use good occupational work practice.
路 Observe manufacturer's storing and handling recommendations.
路 Atmosphere should be regularly checked against established exposure standards to
ensure safe working conditions are maintained.
SUITABLE CONTAINER
Packaging as recommended by manufacturer.
路 Check that containers are clearly labelled.
Glass container.
Plastic container.
Plastic drum.
Polylined drum.
Epon lined metal drum.
STORAGE INCOMPATIBILITY
Avoid reaction with oxidising agents.
Avoid strong acids.
Reacts with acids and moist air evolving toxic and flammable hydrogen
sulfide and corrosive sodium hydroxide.
May react violently with oxidising agents to liberate sulfur dioxide (SO2).
Corrosive most metals including zinc, aluminium and copper.
STORAGE REQUIREMENTS
路 Keep dry.
路 Store in original containers.
路 Keep containers securely sealed.
路 No smoking, naked lights or ignition sources.
路 Store in a cool, dry, well-ventilated area.
路 Store away from incompatible materials.
路 Protect containers against physical damage.
路 Check regularly for leaks.
路 Observe manufacturer's storing and handling recommendations.
SODIUM HYDROSULFIDE
Chemwatch Material Safety Data Sheet
Issue Date: 10-Aug-2005 CHEMWATCH 2318
NC317TCP Version No:3
CD 2007/3 Page 7 of 14
Section 7 - HANDLING AND STORAGE
DO NOT use aluminium or galvanised containers.
_____________________________________________________
SAFE STORAGE WITH OTHER CLASSIFIED CHEMICALS
+ X + X 0 +
_____________________________________________________
+: May be stored together
O: May be stored together with specific preventions
X: Must not be stored together
Section 8 - EXPOSURE CONTROLS / PERSONAL PROTECTION
EXPOSURE CONTROLS
Source Material TWA ppm TWA mg/m鲁 STEL ppm STEL mg/m鲁 Peak mg/m鲁
_________ _________ _____ _____ _____ _____ _____
Australia sodium 10
Exposure hydrosulfide
Standards (Inspirable
dust (Not
specified))
Australia hydrogen 10 14 15 21
Exposure sulfide
Standards (Hydrogen
sulphide)
Australia sodium 2
Exposure hydroxide
Standards (Sodium
hydroxide)
EMERGENCY EXPOSURE LIMITS
Material Revised IDLH Value (mg/m3) Revised IDLH Value (ppm)
hydrogen sulfide 100
sodium hydroxide 10
ODOUR SAFETY FACTOR (OSF)
OSF=1.2E3 (sodium hydrosulfide)
Exposed individuals are reasonably expected to be warned, by smell, that the Exposure
Standard is being exceeded.
Odour Safety Factor (OSF) is determined to fall into either Class A or B.
The Odour Safety Factor (OSF) is defined as:
OSF= Exposure Standard (TWA) ppm/ Odour Threshold Value (OTV) ppm
Classification into classes follows:
Class OSF Description
A 550 Over 90% of exposed individuals
are aware by smell that the
Exposure Standard (TLV- TWA for
example) is being reached, even
when distracted by working
activities
B 26- 550 As " A" for 50- 90% of persons
being distracted
C 1- 26 As " A" for less than 50% of
SODIUM HYDROSULFIDE
Chemwatch Material Safety Data Sheet
Issue Date: 10-Aug-2005 CHEMWATCH 2318
NC317TCP Version No:3
CD 2007/3 Page 8 of 14
Section 8 - EXPOSURE CONTROLS / PERSONAL PROTECTION
persons being distracted
D 0.18- 1 10- 50% of persons aware of
being tested perceive by smell
that the Exposure Standard is
being reached
E <0.18 As " D" for less than 10% of
persons aware of being tested
.
MATERIAL DATA
These "dusts" have little adverse effect on the lungs and do not produce toxic effects or
organic disease. Although there is no dust which does not evoke some cellular response at
sufficiently high concentrations, the cellular response caused by P.N.O.C.s has the
following characteristics:
路 the architecture of the air spaces remain intact,
路 scar tissue (collagen) is not synthesised to any degree,
路 tissue reaction is potentially reversible.
Extensive concentrations of P.N.O.C.s may:
路 seriously reduce visibility,
路 cause unpleasant deposits in the eyes, ears and nasal passages,
路 contribute to skin or mucous membrane injury by chemical or mechanical action, per se,
or by the rigorous skin cleansing procedures necessary for their removal. [ACGIH]
This limit does not apply:
路 to brief exposures to higher concentrations
路 nor does it apply to those substances that may cause physiological impairment at lower
concentrations but for which a TLV has as yet to be determined.
This exposure standard applies to particles which
路 are insoluble or poorly soluble* in water or, preferably, in aqueous lung fluid (if
data is available) and
路 have a low toxicity (i.e.. are not cytotoxic, genotoxic, or otherwise chemically
reactive with lung tissue, and do not emit ionizing radiation, cause immune sensitization
, or cause toxic effects other than by inflammation or by a mechanism of lung overload).
Odour threshold is low (as hydrogen sulfide) and should give some warning.
Hydrogen sulfide paralyses the sense of smell at >100ppm.
INGREDIENT DATA
HYDROGEN SULFIDE:
Odour Threshold Value: 0.0011 ppm (detection), 0.0045 ppm (recognition)
NOTE: Detector tubes for hydrogen sulfide, measuring in excess of 0.5 ppm
are available commercially.
The TLV-TWA is protective against sudden death, eye irritation,
neurasthenic symptoms such as fatigue, headache, dizziness, and
irritability, or permanent central nervous system effects that may result
from acute, subchronic, or acute exposure to hydrogen sulfide.
The offensive odour of hydrogen sulfide does not give a reliable warning
signal because olfactory fatigue occurs at concentrations of 150 to
200 ppm.
Hydrogen sulfide is probably the leading cause of sudden death in the
workplace. Lethal hydrogen sulfide toxicity following inhalation of
1000-2000 ppm paralyses the respiratory centre and causes breathing to
stop. At concentrations between 500 to 1000 pm, the carotid bodies are
stimulated causing hypernea which is followed by apnea. Low concentrations
(50-1500 ppm) produce eye and respiratory tract irritation. Prolonged
exposure to concentrations of the order of 250-500 ppm may produce
pulmonary oedema although 50 ppm has also reportedly produced this effect.
Concentrations in excess of 50 ppm produce acute conjunctivitis with pain,
lachrymation and photophobia. These acute changes may progress to
keratoconjunctivitis and vesiculation of the corneal epithelium.
Concentrations between 5 and 30 ppm produce ocular toxicity.
SODIUM HYDROSULFIDE
Chemwatch Material Safety Data Sheet
Issue Date: 10-Aug-2005 CHEMWATCH 2318
NC317TCP Version No:3
CD 2007/3 Page 9 of 14
Section 8 - EXPOSURE CONTROLS / PERSONAL PROTECTION
SODIUM HYDROXIDE:
The TLV-C is recommended based on concentrations that produce noticeable
but not excessive, ocular and upper respiratory tract irritation.
PERSONAL PROTECTION
EYE
路 Chemical goggles.
路 Full face shield may be required for supplementary but never for primary protection of
eyes
路 Contact lenses may pose a special hazard; soft contact lenses may absorb and
concentrate irritants. A written policy document, describing the wearing of lens or
restrictions on use, should be created for each workplace or task. This should include a
review of lens absorption and adsorption for the class of chemicals in use and an account
of injury experience. Medical and first-aid personnel should be trained in their removal
and suitable equipment should be readily available. In the event of chemical exposure,
begin eye irrigation immediately and remove contact lens as soon as practicable. Lens
should be removed at the first signs of eye redness or irritation - lens should be
removed in a clean environment only after workers have washed hands thoroughly. [CDC
NIOSH Current Intelligence Bulletin 59].
HANDS/FEET
Wear chemical protective gloves, eg. PVC.
Wear safety footwear or safety gumboots, eg. Rubber.
OTHER
路 Overalls.
路 PVC Apron.
路 PVC protective suit may be required if exposure severe.
路 Eyewash unit.
路 Ensure there is ready access to a safety shower.
RESPIRATOR
Protection Factor Half- Face Respirator Full- Face Respirator Powered Air Respirator
10 x ES P1 Air- line* -- PAPR- P1 -
50 x ES Air- line** P2 PAPR- P2
100 x ES - P3 -
Air- line* -
100+ x ES - Air- line** PAPR- P3
* - Negative pressure demand ** - Continuous flow.
The local concentration of material, quantity and conditions of use determine the type of
personal protective equipment required.
For further information consult site specific
CHEMWATCH data (if available), or your
Occupational Health and Safety Advisor.
ENGINEERING CONTROLS
General exhaust is adequate under normal operating conditions. Local exhaust ventilation
may be required in specific circumstances. If risk of overexposure exists, wear approved
respirator. Correct fit is essential to obtain adequate protection. Provide adequate
SODIUM HYDROSULFIDE
Chemwatch Material Safety Data Sheet
Issue Date: 10-Aug-2005 CHEMWATCH 2318
NC317TCP Version No:3
CD 2007/3 Page 10 of 14
Section 8 - EXPOSURE CONTROLS / PERSONAL PROTECTION
ventilation in warehouse or closed storage areas. Air contaminants generated in the
workplace possess varying "escape" velocities which, in turn, determine the "capture
velocities" of fresh circulating air required to effectively remove the contaminant.
Type of Contaminant: Air Speed:
solvent, vapours, degreasing etc., evaporating 0.25- 0.5 m/s (50- 100 f/min)
from tank (in still air).
aerosols, fumes from pouring operations, 0.5- 1 m/s (100- 200 f/min.)
intermittent container filling, low speed
conveyer transfers, welding, spray drift,
plating acid fumes, pickling (released at low
velocity into zone of active generation)
direct spray, spray painting in shallow booths, 1- 2.5 m/s (200- 500 f/min.)
drum filling, conveyer loading, crusher dusts,
gas discharge (active generation into zone of
rapid air motion)
grinding, abrasive blasting, tumbling, high 2.5- 10 m/s (500- 2000 f/min.)
speed wheel generated dusts (released at high
initial velocity into zone of very high rapid
air motion).
Within each range the appropriate value depends on:
Lower end of the range Upper end of the range
1: Room air currents minimal or favourable to 1: Disturbing room air currents
capture
2: Contaminants of low toxicity or of nuisance 2: Contaminants of high toxicity
value only.
3: Intermittent, low production. 3: High production, heavy use
4: Large hood or large air mass in motion 4: Small hood- local control only
Simple theory shows that air velocity falls rapidly with distance away from the opening
of a simple extraction pipe. Velocity generally decreases with the square of distance
from the extraction point (in simple cases). Therefore the air speed at the extraction
point should be adjusted, accordingly, after reference to distance from the contaminating
source. The air velocity at the extraction fan, for example, should be a minimum of 1-2
m/s (200-400 f/min) for extraction of solvents generated in a tank 2 meters distant from
the extraction point. Other mechanical considerations, producing performance deficits
within the extraction apparatus, make it essential that theoretical air velocities are
multiplied by factors of 10 or more when extraction systems are installed or used.
Section 9 - PHYSICAL AND CHEMICAL PROPERTIES
APPEARANCE
Colourless crystals or pale yellow flakes with sulfurous (rotten egg) odour. Has greater
than 25 % water of crystallisation, the most common form being dihydrate (deliquescent
needles or flakes) and trihydrate as the analytical chemical (shiny rhombohedric- cubic
crystals). Changes to yellow, amber to dark red or black in moist air, hydrolyzed to
sodium hydroxide and hydrogen sulfide at room temperature. Corrosive to most metals.
Soluble in water, alcohol and ether. Decomposes in acid. On heating in dry air, turns
yellow, then orange and melts into a black liquid.
PHYSICAL PROPERTIES
Solid.
SODIUM HYDROSULFIDE
Chemwatch Material Safety Data Sheet
Issue Date: 10-Aug-2005 CHEMWATCH 2318
NC317TCP Version No:3
CD 2007/3 Page 11 of 14
Section 9 - PHYSICAL AND CHEMICAL PROPERTIES
Mixes with water.
Molecular Weight: 56.06 Boiling Range (掳C): Not applicable.
Melting Range (掳C): 350, 55 (2H2O), Specific Gravity (water=1): 1.79 (anhydrous)
Solubility in water (g/L): Miscible pH (as supplied): Not applicable
pH (1% solution): 10- 11 (30%) Vapour Pressure (kPa): 10.9 @ 21C, 11.
Volatile Component (%vol): Not available. Evaporation Rate: Not available
Relative Vapour Density (air=1): Not available. Flash Point (掳C): Not applicable
Lower Explosive Limit (%): Not available. Upper Explosive Limit (%): Not available.
Autoignition Temp (掳C): Not available. Decomposition Temp (掳C): Not available
State: Divided solid Viscosity: Not available
Section 10 - CHEMICAL STABILITY AND REACTIVITY INFORMATION
CONDITIONS CONTRIBUTING TO INSTABILITY
路 Presence of incompatible materials.
路 Product is considered stable.
路 Hazardous polymerisation will not occur.
Section 11 - TOXICOLOGICAL INFORMATION
POTENTIAL HEALTH EFFECTS
ACUTE HEALTH EFFECTS
SWALLOWED
The material is corrosive to the gastro-intestinal tract, may cause severe mucous
membrane damage and may be harmful if swallowed.
Ingestion may result in nausea, abdominal irritation, pain and vomiting.
If ingested, sulfide salts can form hydrogen sulfide, causing headache, cyanosis, low
blood pressure, loss of consciousness, tremors and convulsions.
EYE
The material is corrosive to the eyes and is capable of causing pain and severe
conjunctivitis. Corneal injury may develop, with possible permanent impairment of vision,
if not promptly and adequately treated.
SKIN
The material is highly discomforting to the skin.
Prolonged exposure may cause chemical burns.
Solution of material in moisture on the skin, or perspiration, may markedly increase skin
corrosion and accelerate tissue destruction.
Toxic effects may result from skin absorption.
INHALED
The dust may be highly discomforting to the upper respiratory tract and may be harmful if
inhaled.
CHRONIC HEALTH EFFECTS
Principal routes of exposure are by accidental skin and eye contact and inhalation of
generated dusts.
Long term low level exposure to hydrogen sulfide may produce headache, fatigue, dizziness
, irritability and loss of sexual desire. These symptoms may also result when exposed to
hydrogen sulfide at high concentration for a short period of time.
SODIUM HYDROSULFIDE
Chemwatch Material Safety Data Sheet
Issue Date: 10-Aug-2005 CHEMWATCH 2318
NC317TCP Version No:3
CD 2007/3 Page 12 of 14
Section 11 - TOXICOLOGICAL INFORMATION
TOXICITY AND IRRITATION
unless otherwise specified data extracted from RTECS - Register of Toxic Effects of Chemical Substances.
TOXICITY IRRITATION
Intraperitoneal (rat) LD50: 30 mg/kg Nil Reported
Skin (unspec.): Moderate
Eye (unspec.): SEVERE [ICI]
HYDROGEN SULFIDE:
unless otherwise specified data extracted from RTECS - Register of Toxic Effects of Chemical Substances.
TOXICITY IRRITATION
Inhalation (human) LDLo: 5.7 mg/kg Nil Reported
Inhalation (human) LCLo: 600 ppm/30m
Inhalation (human) LCLo: 800 ppm/5m
SODIUM HYDROXIDE:
unless otherwise specified data extracted from RTECS - Register of Toxic Effects of Chemical Substances.
TOXICITY IRRITATION
Skin (rabbit): 500 mg/24h SEVERE
Eye (rabbit): 0.05 mg/24h SEVERE
Eye (rabbit):1 mg/24h SEVERE
Eye (rabbit):1 mg/30s rinsed- SEVERE
The material may produce severe irritation to the eye causing pronounced inflammation.
Repeated or prolonged exposure to irritants may produce conjunctivitis.
The material may cause severe skin irritation after prolonged or repeated exposure and
may produce on contact skin redness, swelling, the production of vesicles, scaling and
thickening of the skin. Repeated exposures may produce severe ulceration.
Asthma-like symptoms may continue for months or even years after exposure to the material
ceases. This may be due to a non-allergenic condition known as reactive airways
dysfunction syndrome (RADS) which can occur following exposure to high levels of highly
irritating compound. Key criteria for the diagnosis of RADS include the absence of
preceding respiratory disease, in a non-atopic individual, with abrupt onset of
persistent asthma-like symptoms within minutes to hours of a documented exposure to the
irritant. A reversible airflow pattern, on spirometry, with the presence of moderate to
severe bronchial hyperreactivity on methacholine challenge testing and the lack of
minimal lymphocytic inflammation, without eosinophilia, have also been included in the
criteria for diagnosis of RADS. RADS (or asthma) following an irritating inhalation is an
infrequent disorder with rates related to the concentration of and duration of exposure
to the irritating substance. Industrial bronchitis, on the other hand, is a disorder that
occurs as result of exposure due to high concentrations of irritating substance (often
particulate in nature) and is completely reversible after exposure ceases. The disorder
is characterised by dyspnea, cough and mucus production.
Section 12 - ECOLOGICAL INFORMATION
Refer to data for ingredients, which follows:
HYDROGEN SULFIDE:
Fish LC50 (96hr.) (mg/l): 0.0071- 0.5
The material is classified as an ecotoxin* because the Fish LC50 (96 hours) is less than
or equal to 0.1 mg/l
* Classification of Substances as Ecotoxic (Dangerous to the Environment)
Appendix 8, Table 1
Compiler's Guide for the Preparation of International Chemical Safety Cards: 1993
Commission of the European Communities.
Toxicity Fish: LC50(96)75->395ug/L
Degradation Biological: sig
SODIUM HYDROSULFIDE
Chemwatch Material Safety Data Sheet
Issue Date: 10-Aug-2005 CHEMWATCH 2318
NC317TCP Version No:3
CD 2007/3 Page 13 of 14
Section 12 - ECOLOGICAL INFORMATION
SODIUM HYDROXIDE:
Prevent, by any means available, spillage from entering drains or water
courses.
DO NOT discharge into sewer or waterways.
Ecotoxicity:
Fish LC50 (96h): 43mg/l
Section 13 - DISPOSAL CONSIDERATIONS
路 Recycle wherever possible or consult manufacturer for recycling options.
路 Consult State Land Waste Management Authority for disposal.
路 Treat and neutralise at an effluent treatment plant.
路 Recycle containers if possible, or dispose of in an authorised landfill.
Controlled destruction, e.g. by acid treatment linked to a suitable scrubber,
is preferred.
Section 14 - TRANSPORTATION INFORMATION
Labels Required: SPONTANEOUSLY COMBUSTIBLE
HAZCHEM: 2X
UNDG:
Dangerous Goods Class: 4.2 Subrisk: None
UN Number: 2318 Packing Group: II
Shipping Name:SODIUM HYDROSULPHIDE with less than 25% water of
crystallization
Air Transport IATA:
ICAO/IATA Class: 4.2 ICAO/IATA Subrisk: None
UN/ID Number: 2318 Packing Group: II
Special provisions: None
Shipping Name: SODIUM HYDROSULPHIDE WITH LESS THAN 25% WATER
OF CRYSTALLIZATION
Maritime Transport IMDG:
IMDG Class: 4.2 IMDG Subrisk: None
UN Number: 2318 Packing Group: II
EMS Number: F- A, S- J Special provisions: None
Shipping Name: SODIUM HYDROSULPHIDE with less than 25% water
of crystallization
Section 15 - REGULATORY INFORMATION
POISONS SCHEDULE: None
REGULATIONS
sodium hydrosulfide (CAS: 16721-80-5) is found on the following regulatory lists;
Australia Exposure Standards
SODIUM HYDROSULFIDE
Chemwatch Material Safety Data Sheet
Issue Date: 10-Aug-2005 CHEMWATCH 2318
NC317TCP Version No:3
CD 2007/3 Page 14 of 14
Section 15 - REGULATORY INFORMATION
Australia High Volume Industrial Chemical List (HVICL)
Australia Inventory of Chemical Substances (AICS)
IMO MARPOL 73/78 (Annex II) - List of Noxious Liquid Substances Carried in Bulk
International Council of Chemical Associations (ICCA) - High Production Volume List
OECD Representative List of High Production Volume (HPV) Chemicals
Section 16 - OTHER INFORMATION
Classification of the preparation and its individual components has drawn on official and
authoritative sources as well as independent review by the Chemwatch Classification
committee using available literature references.
This document is copyright. Apart from any fair dealing for the purposes of private study, research, review or
criticism, as permitted under the Copyright Act, no part may be reproduced by any process without written permission
from CHEMWATCH. TEL (+61 3) 9572 4700.
Issue Date: 10-Aug-2005
Print Date: 10-Jan-2008
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