Ref: MSDS/S04 Rev: 1
06/05/03
MATERIAL SAFETY
DATA SHEET Chemifloc Ltd
Sodium Hydroxide Liquor
Responsible Person: Emergency Telephone:
Chemifloc Ltd, Chemifloc Ltd,
Smithstown Ind. Estate, +353 61-708650
Shannon,
Co. Clare.
+353 61-708650
2. COMPOSITION/INFORMATION ON INGREDIENTS
Common Chemical Name : Sodium Hydroxide Solution 30-50%
Synonyms : Caustic Soda Liquor, Sodium Lye Solution.
Chemical Formula : NaOH
Chemical Family : Alkali.
CAS Name & Number : Sodium Hydroxide / 1310-73-2
Ingredients contributing Sodium Hydroxide.
to the hazard :
3. HAZARDS IDENTIFICATION
Main Hazard 鈥? Corrosive
Causes severe burns. Keep out of reach of children. In case of contact with eyes, rinse immediately
with plenty of water and seek medical advice. Take off all contaminated clothing immediately. Wear
suitable gloves and eye, face protection. In case of accident or if you feel unwell, seek medical advice
immediately (show label where possible).
4. FIRST AID MEASURES
Inhalation : Remove from exposure. Keep warm and at rest. If there is
respiratory distress, give oxygen. If respiration stops or shows
signs of failing, apply artificial respiration.
Obtain medical attention urgently.
Skin contact : Immediately wash with water, preferably under a shower,
removing contaminated clothing while washing proceeds.
Obtain medical attention if irritation persists or if blistering
occurs.
Contaminated clothing should be washed before re-use.
Eye contact : Immediately flood with copious quantities of water for at least
30 minutes holding the eye open if necessary.
Obtain medical attention.
Ingestion : Wash out mouth with water, give plenty of water or other fluids
to drink. Do not induce vomiting. Obtain medical attention
urgently. Treatment may be needed for pain and shock.
Note for Doctors : Harmful by ingestion, inhalation, skin and eye contact. Local
corrosive effects predominate. No known systemic effects. No
known systemic effects.
According to EC Directive 91/155/EEC
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Suitable extinguishing MEASURES
5. FIRE-FIGHTING media : water, water spray, foam, carbon dioxide (CO2), dry powder.
Extinguishing Media : Not applicable.
Sodium hydroxide solution is non flammable.
6. ACCIDENTAL RELEASE MEASURES
Personal precautions : Wear full protective equipment.
See Exposure Controls / Personal Protection (section 8)
Environmental precautions : If spillage or contaminated washings cause contamination of
water courses, drains or vegetation inform relevant authorities.
Methods for cleaning up : Small spillages - dilute carefully with water.
Large spillages - absorb in earth or sand. Place into containers
and dispose of using licensed waste disposal contractors. Wash
down contaminated area with water. Collect and treat all water
used in the clean up, see Environmental Precautions.
7. HANDLING AND STORAGE
Handling : Wear full protective clothing. Provide safety showers and eyebaths in areas
where accidental exposure is possible.
Certain sugars react with sodium hydroxide in solutions above 1% strength
and above 85oC to form carbon monoxide gas.
This can be a respiratory and/or a fire hazard, particularly when cleaning
certain dairy equipment. The susceptible compounds include fructose,
galactose, arabinose, levulose, lactose, maltose and dry whey powder.
Storage : Sodium hydroxide solution should be stored in a closed vessel to avoid
moisture absorption and contamination.
Store sodium hydroxide away from reactive materials.
There is a danger of freezing in cold weather and if the product temperature
falls below the given recommendation it may be necessary to heat the it.
Product temperature must not exceed 50oC unless mild steel in contact with
it has been stressed relieved.
Recommended MINIMUM Storage Temperatures
30% and 47%: 20oC
50%: 25oC
Materials : UNSUITABLE SUITABLE
Aluminium Mild steel (see storage)
Tin Stainless steel
Zinc and alloys Cast iron or steel
Lead and alloys Nickel
Brass Rubber
Copper alloys Epoxy coatings
Certain PVC
(subject to temp. limitations)
Polypropylene
8. EXPOSURE CONTROLS / PERSONAL PROTECTION
Personal protection PVC suit, PVC gloves, PVC or rubber footwear.
equipment : Chemical goggles. Breathing apparatus where fumes are a problem.
STEL: 2 mg/m2
Exposure Limits : EH40 - 1993
According to EC Directive 91/155/EEC
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9. PHYSICAL AND CHEMICAL PROPERTIES
Appearance : Colourless or grey syrupy liquid.
Density Liquid Kg/m3 : @ 20oC 30%: 1328 47%: 1480 50%: 1525
Odour : Slight, characteristic.
Molecular Weight : 40.01g as NAOH 100%
pH : Not applicable.
Solubility : Completely soluble in water.
Boiling Point oC : 30%: 118oC 47%: 140oC 50%: 145oC
Melting Point oC : 30%: + 1 oC 30%: + 8 oC 32%: + 12 oC
Vapour Pressure at oC : @ 15 oC 30%: 6.6 47%: 2.0 50%: 1.45
Flash Point : Not applicable
Flammability : Not applicable
Auto Flammability : Not applicable
10. STABILITY AND REACTIVITY
Stability : Sodium hydroxide if stored correctly will not decompose over time.
Conditions to avoid : Avoid low temperature storage 鈥? see section seven.
Materials to avoid :
- Water Mixture will become warm during initial dilution (exothermic reaction)
- Air No dangerous reaction. Slow absorption of carbon dioxide to form
sodium carbonate.
- Acids Violent reactions.
- Bases/Alkalis No dangerous reaction.
- Oxidising Agents A violent reaction with chlorine, otherwise no dangerous reaction with
oxidising agents in aqueous solution.
- Hazardous Hydrogen gas may be liberated by contact with certain metals such as
Decomposition brass, zinc, aluminium, forming an explosive hazard.
Products
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11. TOXICOLOGICAL INFORMATION
Effects of Substance :
- On Eyes Liquid: severe burns, even on short duration contact.
Mist or spray : moderate to severe irritation, may cause injury
at concentrations.
- On Skin Liquid : severe irritations and burns.
Mist or spray : irritation.
- By Skin Absorption No known systemic effects by any route of exposure.
- By Ingestion Severe irritation and corrosion of the mouth, throat and digestive
tract.
- When Inhaled Exposure to the mist or spray in concentration much above the
(acute effect) hygiene standard causes irritation to the nose, throat and respiratory
tract.
- When Inhaled Not known.
(chronic effect)
12. ECOLOGICAL INFORMATION
Toxic to fish and algae. Concentrations greater than 4 mg/l as 100% may be lethal to fish. Increasing
pH to 10 or more is lethal to aquatic life.
13. DISPOSAL CONSIDERATIONS
Spillages : Wear full protective clothing. See section 8
See also section 6.
Waste : Dispose of sodium hydroxide solutions or materials contaminated with sodium
Hydroxide using a waste disposal firm.
14. TRANSPORT INFORMATION
UN Number : 1824 Class 8 corrosive substance
ADR/RID Classification : 8.42 (b) ADR. HIN. 80
IMO Code/Classification : 8, corrosive.
HAZCHEM Code : 2R
TRENCHEM Number : 52/80G12
Normal Carriage Pressure : Atmospheric
10oC - 48 oC (See Handling and Storage)
Normal Carriage
Temperature :
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15. REGULATORY INFORMATION
Most Important Hazard : C - Corrosive.
Risk Phrases : R35 - Causes severe burns.
Safety Phrases : S2 - Keep out of reach of children.
S26 - In case of contact with eyes, rinse immediately with
plenty of water and seek medical advice.
S27 - Take off all contaminated clothing immediately.
S37/39 - Wear suitable gloves and eye, face protection.
S45 - In case of accident or if you feel unwell, seek
medical advice immediately.
(show label where possible).
Relevant Statutory
Instruments :
1972/10 : Dangerous Substances Act, 1972
S. I. 1980/235: Dangerous Substances (Conveyance of Scheduled Substances by
Road) (Trade or Business) Regulations, 1980.
S. I. 1986/236: Dangerous Substances Act, 1972 (Part IV Declaration) Order,
1980.
S. I. 1986/267: Dangerous Substances Act, 1972 (Part IV Declaration) Order,
1980.
S. I. 1986/268: Dangerous Substances (Conveyance of Scheduled Substances
by Road) (Trade or Business) (Amendment) Regulations, 1986.
S. I. 1986/269: Dangerous Substances (European Agreement Concerning the
International Carriage of Dangerous Goods by Road (ADR)
Regulations, 1986.
S. I. 1994/445: Code of Practice for the safety, Health and welfare at work
(Chemical Agents) Regulation, 1994.
16. OTHER INFORMATION
The information provided in this Safety Data Sheet is correct to the best of our knowledge, information
and belief at the date of its publication. The information given is designed only as a guidance for safe
handling, use, processing, storage, transportation, disposal and release, and is not to be considered a
warranty or quality specification. The information relates only to the specific material designated and
may not be valid for such material used in combination with any other materials or in any process
unless specified in the text.
According to EC Directive 91/155/EEC
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