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Date of Issue : Jul 2000 1. IDENTIFICATION
General Product Name : CORROSIVE LIQUID ACIDIC INORGANIC NOS (HYPOPHOSPHOROUS ACID) Other Names : PHOSPHONIC ACID UN No. : 3264 Dangerous Goods Class : 8 Subsidiary Risk : None Allocated Hazchem Code : 2X Pack Group : III EPG : 37 Poisons Schedule : N/A Uses : Reducing agent, antioxidiant, decolourizing agent, and others.
1.1 Physical Description / Properties
Appearance : Clear water-white solution. Formula : H3PO2 Boiling Point : 108 deg C Melting Point : N/A deg C Vapour Pressure : N/A Specific Gravity : 1.21 (water = 1) Flash Point : N/A pH : N/A () Solubility in water : Sol. 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
Density: 1.21 - 1.23 @ 25 deg C. Thermal decomposition temperature: Decomposes violently above 108 deg C. 1.3 Ingredients
2. HEALTH HAZARD INFORMATION
2.1 Health Effects - Acute Swallowed
May cause burns to gastrointestinal tract. Eye
Liquid, vapours or mist may be corrosive to the eyes. Corrosive - contact may cause burns and tissue destruction. Skin
Liquid, vapours or mist may be corrosive to the skin. Contact may cause burns and tissue destruction. Inhaled
Liquid, vapours, or mist may be corrosive to the respiratory tract. Exposure to vapour, mist or liquid can produce burns of the respiratory tract. 2.2 Health Effects - Chronic
Not classified as a carcinogen by NTP, IARC, OSHA, ACGIH, or NIOSH. Pre-existing disorders may be aggravated to relevant target organs (skin, eyes).
2.3 First Aid
Swallowed
Never give anything by mouth to an unconscious person. If swallowed, DO NOT induce vomiting. Give large quantities of water (if available give several glasses of milk). If vomiting occurs spontaneously, keep airway clear and give more water. Seek medical attention immediately.
Eye
Immediately flush eyes with large amounts of water for at least 15 minutes, forcibly holding eyelids apart to ensure complete irrigation of all eye and lid tissue. Washing eyes within one minute is essential to achieve maximum effectiveness. Seek medical attention immediately.
Skin
Flush thoroughly with cool water under shower shile removing contaminated clothing and shoes. Discard non-rubber shoes. Wash clothing before reuse. Get medical attention as soon as possible.
Inhaled
Remove to fresh air. If breathing is difficult, have trained person administer oxygen. If respiration stops, give mouth-to-mouth resuscitation. Get medical attention.
First Aid Facilities
Ensure an eye bath and safety shower available and ready for use.
2.5 Advice to Doctor
Treat symptomatically based on individual reactions of patient and judgement of doctor.
2.6 Toxicity Data
No information available.
3. PRECAUTIONS FOR USE
3.1 Exposure Standards
None established.
3.2 Engineering Controls
Handle product in a well ventilated area. If product is handled in an open system, the use of process enclosures, local exhaust ventilation, and/or other engineering controls should be considered to control airbourne levels to below acceptable levels.
3.3 Personal Protection
A NIOSH approved respirator with an organic vapour acid gas cartridge with dust, fume and mist filter may be permissible under certain circumstances where airbourne concentrations are expected to exceed exposure limits, or when symptoms have been observed that are indicative of exposure. Follow the OSHA respiratory protection requirements and other mandated actions in 29 CFR 1910.1017. Wear chemical safety goggles plus full face shield to protect against splashing when appropriate. Wear chemical resistant gloves such as rubber, neoprene or vinyl. Wear rubber apron and boots.
3.4 Flammability
Not combustible. SAFE HANDLING INFORMATION
4.1 Storage / Transport
Keep away from strong oxidizing agents. Store containers in a cool, dry, ventilated, fire resistant area away from direct heat and separated from oxidizers.
4.2 Packaging / Labelling UN No. 3264 Class 8 Sub Risk None Allocated Hazchem Code 2X Pack Group III EPG No. 37 Shipping Name CORROSIVE LIQUID ACIDIC INORGANIC NOS (HYPOPHOSPHOROUS ACID) Hazard CORROSIVE
Risk Phrases R34 Causes burns.
Safety Phrases S24/25 Avoid contact with skin and eyes.
4.3 Spills and Disposal
Spills
Clean up personnel should wear safety glasses with side shields or chemical splash goggles, protective clothing and chemical resistant gloves. Avoid discharges into sewers or streams.
For small spills, neutralize with soda ash and scoop up for transfer into marked containers for disposal. For large spills, dike and pump into properly labeled containers for reclamation or disposal.
Disposal
Product should be completely removed from containers. Material that should be used or chemically reprocessed should be disposed of in accordance with local, state and federal regulations.
4.4 FIRE AND EXPLOSION HAZARD Fire / Explosion
Not combustible. Will liberate toxic gases (oxides of phosphorous) when heated to decomposition. Will react violently with oxidizing agents. Solution becomes thermally unstable on evaporation of water. Use water spray to disperse the vapours of leaking/spilled material that has not ignited (also to protect personnel attempting to shut of the source).
Extinguishing Media
Firefighters should wear full protective clothing including self contained breathing apparatus. Use foam, dry chemical, carbon dioxide, water fog or spray as extinguishing media. 5 OTHER INFORMATION
Other Information
Do not subject this material to heat conditions which may result in concentrations above 50% hypophosphorous acid. Concentrations above 50% can yield thermally unstable solutions. Decomposes violently when heated above 108 deg C and will yield toxic oxides of phosphorous and phosphine gas under these conditions. In contact with metals, material starts breaking down considerably below the boiling temperature, liberating phosphine and flammable hydrogen gas, and forming phosphrous and phosphonic acids.
5.1 Contact Points
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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.
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