|
|
Date of Issue : Feb 2000 1. IDENTIFICATION
General Product Name : SODIUM NITRITE Other Names : NITROUS ACID, SODIUM SALT UN No. : 1500 Dangerous Goods Class : 5.1 Subsidiary Risk : 61 Hazchem Code : 1[Z] Pack Group : III EPG : 31 Poisons Schedule : 5 Uses : Auxillary for the chemical, pharmaceutical, textile, steel and non-ferrous metal industries and many other branches of industry.
1.1 Physical Description / Properties
Appearance : White crystalline powder with no odour. Formula : NaNO2 Boiling Point : Dec. deg C Melting Point : 280 deg C Vapour Pressure : N/A Specific Gravity : 2.1 (water = 1) Flash Point : N/A pH : 8-9 (100g/l, 20degC) Solubility in water : 818 g/l (25 deg C) Flammability Limits (as percentage volume in air) Lower Explosion Limit : N/A Upper Explosion Limit : N/A 1.2 Other Properties
Decomposes above 320 deg C. Molecular weight: 69.0. Octanol/water partition coefficient (log POW): -3.7. Bulk density: 1200 kg/m3. 1.3 Ingredients
2. HEALTH HAZARD INFORMATION
2.1 Health Effects - Acute Swallowed
Toxic if swallowed. Lethal dose for adults is 4 - 6 g with a lower dose for children. Ingestion of this product may cause methaemoglobin formation in the blood, motor activity changes, coma, decreased blood pressure with possible pulse rate increase without fall in blood pressure, dilation of veins and arteries, nausea or vomiting. Eye
Contact with eyes may result in slight irritation. Skin
Contact with skin is not expected to cause irritation. Inhaled
The inhalation of nitrogen oxides will affect the respiratory system. The inhalation of powder or dust may result in respiratory irritation. 2.2 Health Effects - Chronic
The product may react with organic amines in the body to form carcinogenic nitrosamines. Under certain conditions (low pH) nitrosamines can be formed with readily nitrosating compounds (eg. secondary amines); nitrosamines were found to cause cancer in animal studies. Chronic exposure to nitrites may cause headaches, visual problems and decreased blood pressure.
2.3 First Aid
Swallowed
If swallowed, immediately rinse out mouth and then drink 1 - 3 cups of water. Seek medical attention immediately.
Eye
If eye contact occurs, rinse thoroughly under running water for 15 minutes with eyelids held open. Seek medical attention immediately.
Skin
If skin contact occurs, wash thoroughly under running water. Remove contaminated clothing and launder thoroughly before reuse.
Inhaled
If thermal decomposition vapours are inhaled, remove affected person to fresh air and seek medical attention immediately. Keep person calm and warm. If necessary administer oxygen or anti-inflammatory spray. In cases where there is loss of consciousness, place affected person in the coma or lateral position and transport to a hospital or doctor. Show this MSDS to hospital staff.
First Aid Facilities
Ensure an eye bath and safety shower are available and ready for use.
2.5 Advice to Doctor
The symptoms of poisoning by nitrogen oxides may take a number of hours to appear. Nitrogen oxides affect the respiratory tract and may give rise to pulmonary oedeam (fluid build-up in the lungs). Treat symptomatically.
2.6 Toxicity Data
Oral LD50 = 85 - 180 mg/kg (Rat) Inhalation LC50 = 5.5 mg/m3 (Rat)
3. PRECAUTIONS FOR USE
3.1 Exposure Standards
An exposure standard has not been established for this product. However, the following for nuisance dusts is recommended : TWA 10 mg/m3
3.2 Engineering Controls
Provide local exhaust ventilation to maintain exposure levels below standard.
3.3 Personal Protection
The following personal protection equipment is recommended : protective goggles, dust mask (if exposure standard is likely to be exceeded), approved protective clothing. Protective equipment should comply with relevant Standards. Avoid inhalation of dust.
3.4 Flammability
Strong oxidising agent which will promote combustion in event of fire. Contact with organic matter will ignite by friction. SAFE HANDLING INFORMATION
4.1 Storage / Transport
Store in accordance with all Commonwealth, State or Territory regulations relevant to Class 5.1 substances. Transport in accordance with the n Dangerous Goods Code. Store in a cool, dry area away from heat and moisture. Keep away from acids, ammonium salts, sulfites, metabisulfites, cyanides, reducing substances, oxidizing substances, amines. Keep containers closed when not in use.
4.2 Packaging / Labelling UN No. 1500 Class 5.1 Sub Risk 61 Hazchem Code 1[Z] Pack Group III EPG No. 31 Shipping Name SODIUM NITRITE Hazard OXIDIZING TOXIC
Risk Phrases R8 Contact with combustible material may cause fire. R25 Toxic if swallowed. R50 Very toxic to aquatic organisms.
Safety Phrases S1/2 Keep locked up and out of the reach of children. S45 In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible). S61 Avoid release to the environment. Refer to special instructions/safety data sheets.
4.3 Spills and Disposal
Spills
Eliminate flammables and all sources of ignition (NO SMOKING). Avoid rainsing dust. Use non-sparking tools. Clean up personnel should wear approved clothing with protective goggles and approved dust mask. Secure the area of spillage or accident.
Sweep up spills carefully and dissolve in water if the product is contaminated with other substances. Small spills can be flushed away with copious amounts of water. Remove and transfer as a heavily diluted aqueous solution to an effluent treatment plant. Flush away spill area residues with copious amounts of water.
Disposal
Dispose of in accordance with all Local, State and Federal regulations at an approved waste disposal facility. Packs must be completely emptied. Contaminated packs should be emptied as far as possible and then passed on for recycling or reprocessing after being thoroughly cleaned.
4.4 FIRE AND EXPLOSION HAZARD Fire / Explosion
Sodium nitrite is incombustible, but does promote combustion. Mixtures of sodium nitrite and combustible or flammable substances can react explosively. Nitrogen oxides and sodium monoxide will be evolved in a fire. Incompatible with combustible substances, acids, flammable and combustible liquids, ammonium salts, reducing agents, oxidisable substances, amines and products containing amines. If combustible materials (eg textiles) become contaminated with this product, they may spontaneously ignite and explosions may occur. Molten sodium nitrite is alkaline and will react with acids.
Extinguishing Media
Use water. DO NOT use dry chemicals or agents which contain ammonium salts. Contain and dispose of fire debris and contaminated extinguishants in accordance with State and Local Government regulations. Firefighters should wear full protective clothing including self contained breathing apparatus. 5 OTHER INFORMATION
Other Information
The product should never enter wastewater streams without pretreatment. Strong Inorganic salt; degradability information not applicable. Nitrite may oxidise to nitrate due to the microorganisms and may also be reduced to nitrogen. Toxicity to fish : EC/LC50 135 mg/L/48h (Golden orfe) Toxicity to bacteria : Toxic Limit Concentration 123 mg/L Toxicity to algae : Toxic Limit Concentration 123 mg/L Toxicity to daphnia : EC/LC50 > 12.5 mg/L/48h (Daphnia magna) Water Pollution Class : Hazardous to aquatic organisms Marine Pollutant : no
5.1 Contact Points
|
|||||||||||||||||||||||
|
|
|||||||||||||||||||||||
The information above is believed to be accurate and represents the best information currently available to us. However, we make no warranty of merchantability or any other warranty, express or implied, with respect to such information, and we assume no liability resulting from its use.
|
|||||||||||||||||||||||
|
|
 |