SODIUM HYDROSULPHITE 90% POWDER
Chemwatch Material Safety Data Sheet
Issue Date: 10-Aug-2005 CHEMWATCH 1384
NC317TCP Version No:3
CD 2007/3 Page 1 of 13
Section 1 - CHEMICAL PRODUCT AND COMPANY IDENTIFICATION
PRODUCT NAME
SODIUM HYDROSULPHITE 90% POWDER
SYNONYMS
Na2S2O4, "Na2S2O4. 2H2O", H2O4S2.2Na, "sodium dithionite inhibited", "sodium
hydrosulphite", "sodium sulfoxylate", "dithionous acid, disodium salt"
PROPER SHIPPING NAME
SODIUM HYDROSULPHITE
PRODUCT USE
Pulp and paper bleaching. As reducing agent, particularly in dyeing with indigo and vat
dyes. Used as a bleach, for soap, straw; removing dyes from dyed fabric. Part of a redox
catalyst system for synthetic rubber production. Oxygen scavenger in water treatment,
reduction of metals in waste treatment.
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 HYDROSULPHITE 90% POWDER
Chemwatch Material Safety Data Sheet
Issue Date: 10-Aug-2005 CHEMWATCH 1384
NC317TCP Version No:3
CD 2007/3 Page 2 of 13
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. Keep locked up.
Spontaneously flammable in air. Do not breathe dust.
Harmful if swallowed. Wear suitable protective clothing.
Contact with water liberates toxic gas. In case of insufficient ventilation wear
suitable respiratory equipment.
Contact with acids liberates toxic gas. To clean the floor and all objects contaminated
by this material use water and detergent.
Cumulative effects may result following This material and its container must be disposed
exposure*. of in a safe way.
Limited evidence of a carcinogenic effect*. Keep away from food drink and animal feeding
stuffs.
Possible respiratory sensitiser*. Take off immediately all contaminated clothing.
Possible skin sensitiser*. This material and its container must be disposed
of as hazardous waste.
* (limited evidence).
Section 3 - COMPOSITION / INFORMATION ON INGREDIENTS
NAME CAS RN %
sodium hydrosulphite 90% powder 7775-14-6 >88
NOTE: Decomposes to produce
sulfur dioxide 7446-09-5
commercial materials may contain
sodium sulfite 7757-83-7 <5^
sodium carbonate 497-19-8 <5^
sodium sulfate 7757-82-6 <3^
sodium bisulfite 7631-90-5 <2^
sodium thiosulfate 7772-98-7 <0.3^
sodium hydrogen sulfate 7681-38-1 <0.1^
Section 4 - FIRST AID MEASURES
SWALLOWED
Rinse mouth out with plenty of water.
For advice, contact a Poisons Information Centre or a doctor.
路 IF SWALLOWED, REFER FOR MEDICAL ATTENTION, WHERE POSSIBLE, WITHOUT DELAY.
路 For advice, contact a Poisons Information Centre or a doctor.
SODIUM HYDROSULPHITE 90% POWDER
Chemwatch Material Safety Data Sheet
Issue Date: 10-Aug-2005 CHEMWATCH 1384
NC317TCP Version No:3
CD 2007/3 Page 3 of 13
Section 4 - FIRST AID MEASURES
Where Medical attention is not immediately available or where the patient is more than 15
minutes from a hospital or unless instructed otherwise:
路 Induce vomiting with fingers down the back of the of the throat, ONLY IF CONSCIOUS.
路 Lean patient forward or place on left side (head-down position if possible) to maintain
open airway and prevent aspiration.
NOTE: Wear a protective glove when inducing vomiting by mechanical means.
路 In the mean time, qualified first-aid personnel should treat the patient following
observation and employing supportive measures as indicated by the patient's condition.
路 If the services of a medical officer or medical doctor are readily available, the
patient should be placed in his/her care and a copy of the MSDS should be provided.
Further action will be the responsibility of the medical specialist.
路 If medical attention is not available on the worksite or surroundings send the patient
to a hospital together with a copy of the MSDS.
EYE
If this product comes in contact with the eyes:
路 Wash out immediately with fresh 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 If pain persists or recurs seek medical attention.
路 Removal of contact lenses after an eye injury should only be undertaken by skilled
personnel.
SKIN
If skin contact occurs:
路 Immediately remove all contaminated clothing, including footwear.
路 Flush skin and hair with running water (and soap if available).
路 Seek medical attention in event of irritation.
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
Treat symptomatically.
Section 5 - FIRE FIGHTING MEASURES
EXTINGUISHING MEDIA
Do NOT use water other than in FLOODING quantities.
Dry sand. Dry chemical powder or Carbon dioxide.
FIRE FIGHTING
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 courses.
Cool fire exposed containers with water spray from a protected location.
DO NOT approach containers suspected to be hot.
If safe to do so, remove containers from path of fire.
SODIUM HYDROSULPHITE 90% POWDER
Chemwatch Material Safety Data Sheet
Issue Date: 10-Aug-2005 CHEMWATCH 1384
NC317TCP Version No:3
CD 2007/3 Page 4 of 13
Section 5 - FIRE FIGHTING MEASURES
FIRE/EXPLOSION HAZARD
Liable to spontaneous heating. Combustible.
Dangerous hazard when exposed to heat, flame and oxidisers.
Solid in contact with water or moisture may generate sufficient heat to ignite
combustible materials.
Emits toxic fumes if involved in fire.
Decomposes on heating and produces toxic fumes of: highly discomforting sulfur oxides
(SOx) and caustic compounds.
FIRE INCOMPATIBILITY
Keep dry. and Avoid contact with oxidising agents as ignition may result.
Contact with moisture or water may generate heat causing ignition.
HAZCHEM: 1YE
Personal Protective Equipment
Gas tight chemical resistant suit.
Section 6 - ACCIDENTAL RELEASE MEASURES
EMERGENCY PROCEDURES
MINOR SPILLS
Keep dry. Contact with water can cause heating and decomposition.
DO NOT touch the spill material. Clean up all spills immediately.
Wear protective clothing, impervious gloves and safety glasses.
Remove all ignition sources.
Use dry clean up procedures and avoid generating dust.
Trowel up/scrape up.
Place in suitable containers for disposal.
MAJOR SPILLS
Keep dry. Contact with water can cause heating and decomposition.
Contact with water liberates toxic gases. i.e sulfur dioxide (SO2).
Clear area of personnel and move upwind.
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 and water
courses.
Shut off all possible sources of ignition and increase ventilation.
No smoking or naked lights within area.
DO NOT touch the spill material. Avoid generating dust.
Collect recoverable product into labelled containers for recycling.
Collect residues and seal in labelled drums for disposal.
After clean up operations, decontaminate and launder all protective clothing and
equipment before storing and re-using.
PROTECTIVE ACTIONS FOR SPILL
SODIUM HYDROSULPHITE 90% POWDER
Chemwatch Material Safety Data Sheet
Issue Date: 10-Aug-2005 CHEMWATCH 1384
NC317TCP Version No:3
CD 2007/3 Page 5 of 13
Section 6 - ACCIDENTAL RELEASE MEASURES
PROTECTIVE ACTION ZONE
half
evacuation
downwind
direction
distance
down wind distance
wind isolation
distance
direction
half
evacuation downwind
INITIAL direction distance
ISOLATION
ZONE
From US Emergency Response Guide 2000
Guide 135
SMALL SPILLS
Name Isolation Distance Downwind Day Protection Night
Sodium dithionite (when 100 ft (30 m) 0.1 mile (0.2 km) 0.1 mile (0.2 km)
spilled in water)
LARGE SPILLS
Name Isolation Distance Downwind Day Protection Night
Sodium dithionite (when 100 ft (30 m) 0.2 mile (0.3 km) 0.7 mile (1.1 km)
spilled in water)
From IERG (Canada/Australia)
Isolation Distance 50 metres
Downwind Protection Distance 250 metres
IERG Number 25
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 hydrosulphite 250 mg/m鲁
irreversible or other serious effects or symptoms which could impair an individual's ability to take
SODIUM HYDROSULPHITE 90% POWDER
Chemwatch Material Safety Data Sheet
Issue Date: 10-Aug-2005 CHEMWATCH 1384
NC317TCP Version No:3
CD 2007/3 Page 6 of 13
Section 6 - ACCIDENTAL RELEASE MEASURES
protective action is:
sodium hydrosulpite 50 mg/m鲁
other than mild, transient adverse effects without perceiving a clearly defined odour is:
sodium hydrosulphite 30 mg/m鲁
The threshold concentration below which most people will experience no appreciable risk of health effects:
sodium hydrosulphite 10 mg/m鲁
American Industrial Hygiene Association (AIHA)
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
Avoid generating and breathing dust. Keep dry.
Avoid contact with skin and eyes.
Wear personal protective equipment when handling.
Use in a well-ventilated area.
Keep containers securely sealed when not in use.
When handling, DO NOT eat, drink or smoke.
Wash hands with soap and water after handling.
Launder contaminated clothing before re-use.
SUITABLE CONTAINER
路 Check that containers are clearly labelled.
Plastic container.
Plastic drum.
STORAGE INCOMPATIBILITY
Segregate from moisture and oxidizing substances.
STORAGE REQUIREMENTS
Keep dry. Store below 38 deg. C.
Observe manufacturer's storing and handling recommendations.
Store away from sources of heat or ignition / naked lights.
Store away from incompatible materials.
Store away from oxidising materials.
Store away from foodstuff containers.
Keep storage area free of debris, waste and combustibles.
Check regularly for spills and leaks.
_____________________________________________________
SAFE STORAGE WITH OTHER CLASSIFIED CHEMICALS
X X + X X +
_____________________________________________________
+: May be stored together
SODIUM HYDROSULPHITE 90% POWDER
Chemwatch Material Safety Data Sheet
Issue Date: 10-Aug-2005 CHEMWATCH 1384
NC317TCP Version No:3
CD 2007/3 Page 7 of 13
Section 7 - HANDLING AND STORAGE
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
_________ _________ _____ _____ _____ _____
Australia sodium hydrosulphite 10
Exposure (Inspirable dust
Standards (Not specified))
Australia sulfur dioxide 2 5.2 5 13
Exposure (Sulphur dioxide)
Standards
EMERGENCY EXPOSURE LIMITS
Material Revised IDLH Value (mg/m3) Revised IDLH Value (ppm)
sulfur dioxide 100 [Unch]
ODOUR SAFETY FACTOR (OSF)
OSF=1.8 (sodium dithionite)
Exposed individuals are NOT 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 C, D or E.
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
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
INGREDIENT DATA
SULFUR DIOXIDE:
NOTE: Detector tubes for sulfur dioxide, measuring in excess of 0.1 ppm,
SODIUM HYDROSULPHITE 90% POWDER
Chemwatch Material Safety Data Sheet
Issue Date: 10-Aug-2005 CHEMWATCH 1384
NC317TCP Version No:3
CD 2007/3 Page 8 of 13
Section 8 - EXPOSURE CONTROLS / PERSONAL PROTECTION
are commercially available.
Sulfur dioxide is termed a "mild" respiratory irritant.
Odour threshold (detection) is 0.5 ppm with irritation reported above
2 ppm; at 8-12 ppm eyes and nose are strongly irritated. 150 ppm is only
tolerable for about a minute because of extreme irritation. At 500 ppm
there is a sense of suffocation. Human bronchoconstriction occurs with
inhalation at 5 ppm or more and the recommended TLV-TWA is thought to
provide a reduction of significant risk of adverse respiratory effects
such as coughing, increase in sputum production and bronchoconstriction.
The reported effects of SO2 in humans exposed to levels below 2 ppm,
together with the potentiation of SO2 toxicity by soot and other
particulates, has created the need for the current review by ACGIH.
A worker inhaling 4 ppm for 8 hours and doing light-work would absorb
about 150 mg of SO2. By comparison, average dietary intake for a 70 kg man
has been established at only 50 mg.
PERSONAL PROTECTION
EYE
路 Safety glasses with side shields; or as required,
路 Chemical goggles.
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
PVC gloves.
Neoprene gloves.
Nitrile gloves.
OTHER
PVC apron. 路 Overalls
路 Eyewash unit.
If large quantities are handled:
RESPIRATOR
Protection Factor Half- Face Respirator Full- Face Respirator Powered Air Respirator
10 x ES E P1 Air- line* -- E PAPR- P1 -
50 x ES Air- line** E P2 E PAPR- P2
100 x ES - E P3 -
Air- line* -
100+ x ES - Air- line** E PAPR- P3
* - Negative pressure demand ** - Continuous flow.
SODIUM HYDROSULPHITE 90% POWDER
Chemwatch Material Safety Data Sheet
Issue Date: 10-Aug-2005 CHEMWATCH 1384
NC317TCP Version No:3
CD 2007/3 Page 9 of 13
Section 8 - EXPOSURE CONTROLS / PERSONAL PROTECTION
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
Use in a well-ventilated area.
路 Local exhaust ventilation is required where solids are handled as powders or crystals;
even when particulates are relatively large, a certain proportion will be powdered by
mutual friction.
路 Exhaust ventilation should be designed to prevent accumulation and recirculation of
particulates in the workplace.
路 If in spite of local exhaust an adverse concentration of the substance in air could
occur, respiratory protection should be considered. Such protection might consist of:
(a): particle dust respirators, if necessary, combined with an absorption cartridge;
(b): filter respirators with absorption cartridge or canister of the right type;
(c): fresh-air hoods or masks
路 Build-up of electrostatic charge on the dust particle, may be prevented by bonding and
grounding.
路 Powder handling equipment such as dust collectors, dryers and mills may require
additional protection measures such as explosion venting.
Air contaminants generated in the workplace possess varying "escape" velocities which, in
turn, determine the "capture velocities" of fresh circulating air required to efficiently
remove the contaminant.
Type of Contaminant: Air Speed:
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 4-10
m/s (800-2000 f/min) for extraction of crusher dusts generated 2 metres distant from the
extraction point. Other mechanical considerations, producing performance deficits within
the extraction apparatus, make it essential that theoretical air velocities are
SODIUM HYDROSULPHITE 90% POWDER
Chemwatch Material Safety Data Sheet
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Section 8 - EXPOSURE CONTROLS / PERSONAL PROTECTION
multiplied by factors of 10 or more when extraction systems are installed or used.
Section 9 - PHYSICAL AND CHEMICAL PROPERTIES
APPEARANCE
White or yellow grey crystalline solid. Slight characteristic odour. Liable to heat and to
ignite spontaneously in damp air or when wet and to evolve intensely irritating sulfur
dioxide gas. The dihydrate is less stable than anhydrous material Solubility in cold
water: = 18%. Decomposes in hot water, releasing sulfur dioxide. Insoluble in alcohol.
Readily oxidises in air to acidic sodium bisulfite / sodium bisulfate.
PHYSICAL PROPERTIES
Solid.
Contact with water liberates toxic gas.
Contact with acids liberates toxic gas.
Molecular Weight: 174.13 Boiling Range (掳C): 130 decomposes
Melting Range (掳C): 52- 55 decomposes Specific Gravity (water=1): 1.02
Solubility in water (g/L): Miscible 18% pH (as supplied): Not applicable
pH (1% solution): Not available Vapour Pressure (kPa): Not applicable
Volatile Component (%vol): Nil @ 38C Evaporation Rate: Not applicable
Relative Vapour Density (air=1): > 1 as SO2 Flash Point (掳C): Not applicable
Lower Explosive Limit (%): Not available Upper Explosive Limit (%): Not available
Autoignition Temp (掳C): 130 Decomposition Temp (掳C): Not available
State: Divided solid Viscosity: Not available
Section 10 - CHEMICAL STABILITY AND REACTIVITY INFORMATION
CONDITIONS CONTRIBUTING TO INSTABILITY
Contact with acids liberates toxic gas.
Section 11 - TOXICOLOGICAL INFORMATION
POTENTIAL HEALTH EFFECTS
ACUTE HEALTH EFFECTS
SWALLOWED
Considered an unlikely route of entry in commercial/industrial environments.
The material is highly discomforting to the gastro-intestinal tract and may be harmful if
swallowed in large quantity.
EYE
The dust may be highly discomforting 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 and may cause blisters or burns if
exposure is prolonged and is capable of causing allergic skin reactions which may lead to
dermatitis.
The material may accentuate any pre-existing skin condition.
Solution of material in moisture on the skin, or perspiration, may markedly increase skin
corrosion and accelerate tissue destruction.
SODIUM HYDROSULPHITE 90% POWDER
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Section 11 - TOXICOLOGICAL INFORMATION
Bare unprotected skin should not be exposed to this material.
INHALED
The dust may be highly discomforting to the upper respiratory tract and may cause in some
cases, sensitisation.
CHRONIC HEALTH EFFECTS
Principal routes of exposure are usually by inhalation of generated dust and skin contact
with the material.
Prolonged or repeated skin contact may cause drying with cracking, irritation and
possible dermatitis following.
TOXICITY AND IRRITATION
Not available. Refer to individual constituents.
SULFUR DIOXIDE:
unless otherwise specified data extracted from RTECS - Register of Toxic Effects of Chemical Substances.
TOXICITY IRRITATION
Inhalation (rat) LC50: 2520 ppm/1h Nil Reported
Inhalation (human) LCLo: 1000 ppm/10m
Inhalation (human) TCLo: 3 ppm/5d
400-500 ppm - immediately dangerous to life.
NOTE: Aggravates chronic pulmonary disease and increases the risk of acute
and chronic respiratory disease - condition aggravated by smoking.
MATERIAL CARCINOGEN REPROTOXIN SENSITISER SKIN
_______________ ____________ __________ __________ __________
sulfur dioxide IARC:3
CARCINOGEN
IARC: International Agency for Research on Cancer (IARC) Carcinogens: sulfur dioxide
Category: 3
Section 12 - ECOLOGICAL INFORMATION
Refer to data for ingredients, which follows:
SULFUR DIOXIDE:
Toxicity Fish: LC50(96)>12.5mg/L
Toxicity invertebrate: LC50(48)802-2241ppm
Section 13 - DISPOSAL CONSIDERATIONS
Consult manufacturer for recycling options.
Consult State Land Waste Management Authority for disposal.
Clean-up Technique (Hach):- Cover with an inert material such as sand.
Carefully mist spill with bleach until saturated.
Working in a large container, cautiously add small portions of the spilled
material to cold water with agitation. React the spilled material in
bleach at a ratio of 25 ml of 5% sodium hypochlorite solution (household
bleach) to 1 gram of sodium hydrosulfite. Filter to remove solids.
Flush reacted material to sewer with a large excess of water.
Decontaminate area of spill with a soap solution.
SODIUM HYDROSULPHITE 90% POWDER
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Section 14 - TRANSPORTATION INFORMATION
Labels Required: SPONTANEOUSLY COMBUSTIBLE
HAZCHEM: 1YE
UNDG:
Dangerous Goods Class: 4.2 Subrisk: None
UN Number: 1384 Packing Group: II
Shipping Name:SODIUM DITHIONITE (SODIUM HYDROSULPHITE)
Air Transport IATA:
ICAO/IATA Class: 4.2 ICAO/IATA Subrisk: None
UN/ID Number: 1384 Packing Group: II
Special provisions: None
Shipping Name: SODIUM DITHIONITE
Maritime Transport IMDG:
IMDG Class: 4.2 IMDG Subrisk: None
UN Number: 1384 Packing Group: II
EMS Number: F- A, S- J Special provisions: None
Shipping Name: SODIUM DITHIONITE (SODIUM HYDROSULPHITE)
Section 15 - REGULATORY INFORMATION
POISONS SCHEDULE: None
REGULATIONS
sodium dithionite (CAS: 7775-14-6) is found on the following regulatory lists;
Australia Exposure Standards
Australia High Volume Industrial Chemical List (HVICL)
Australia Inventory of Chemical Substances (AICS)
Australia Standard for the Uniform Scheduling of Drugs and Poisons (SUSDP) - Appendix F (Part 3)
Australia Standard for the Uniform Scheduling of Drugs and Poisons (SUSDP) - Schedule 5
International Council of Chemical Associations (ICCA) - High Production Volume List
OECD Representative List of High Production Volume (HPV) Chemicals
Section 16 - OTHER INFORMATION
INGREDIENTS WITH MULTIPLE CAS NUMBERS
Ingredient Name CAS
sodium sulfite 7757- 83- 7, 10102- 15- 5
sodium hydrogen sulfate 7681- 38- 1, 10034- 88- 5
REPRODUCTIVE HEALTH GUIDELINES
Established occupational exposure limits frequently do not take into consideration
reproductive end points that are clearly below the thresholds for other toxic effects.
Occupational reproductive guidelines (ORGs) have been suggested as an additional
standard. These have been established after a literature search for reproductive no
-observed-adverse effect-level (NOAEL) and the lowest-observed-adverse-effect-level
SODIUM HYDROSULPHITE 90% POWDER
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Section 16 - OTHER INFORMATION
(LOAEL). In addition the US EPA's procedures for risk assessment for hazard
identification and dose-response assessment as applied by NIOSH were used in the creation
of such limits. Uncertainty factors (UFs) have also been incorporated.
Ingredient ORG UF Endpoi CR Adeq
nt TLV
sulfur dioxide 2.3 mg/m3 100 D NA -
These exposure guidelines have been derived from a screening level of risk assessment and
should not be construed as unequivocally safe limits. ORGS represent an 8-hour time
-weighted average unless specified otherwise.
CR = Cancer Risk/10000; UF = Uncertainty factor:
TLV believed to be adequate to protect reproductive health:
LOD: Limit of detection
Toxic endpoints have also been identified as:
D = Developmental; R = Reproductive; TC = Transplacental carcinogen
Jankovic J., Drake F.: A Screening Method for Occupational Reproductive
American Industrial Hygiene Association Journal 57: 641-649 (1996).
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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