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Date of Issue : Oct 1999 1. IDENTIFICATION
General Product Name : PHOSPHOROUS ACID Other Names : PHOSPHONIC ACID UN No. : 2834 Dangerous Goods Class : 8 Subsidiary Risk : None Allocated Hazchem Code : 2R Pack Group : III EPG : 37 Poisons Schedule : 5 Uses : Analysis (testing for mercury), chemical reducing agent, phosphite salts.
1.1 Physical Description / Properties
Appearance : Colourless crystals with garlic odour. Formula : H3PO3 Boiling Point : 200 deg C Melting Point : 73.6 deg C Vapour Pressure : N/A Specific Gravity : 1.651 (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
Readily soluble in alcohol, with hygroscopicity, deliquesence, and corrosiveness. Thermal decomposition : 180 deg C. Absorbs oxygen very readily with formation of orthophosphoric acid. 1.3 Ingredients
2. HEALTH HAZARD INFORMATION
2.1 Health Effects - Acute Swallowed
Harmful if swallowed. Eye
Extremely destructive to eyes. Skin
Extremely destructive to skin. Inhaled
Extremely destructive to tissue of the mucous membranes and upper respiratory tract. Inhalation may be fatal as a result of spasm, inflammation and edema. Symptoms of exposure may include burning sensation, coughing, wheezing, headache laryngitis, shortness of breath, nausea and vomiting. 2.2 Health Effects - Chronic
No information available.
2.3 First Aid
Swallowed
DO NOT induce vomiting. Allow the victim to rinse their mouth out and then to drink 2-4 cupfuls of water, and seek medical advice.
Eye
Immediately flush eyes with plenty of water for at least 15 minutes occasionally lifting the upper and lower lids. Get medical aid immediately.
Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
Inhaled
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
First Aid Facilities
Ensure an eye bath and safety shower are available and ready for use.
2.5 Advice to Doctor
Treat symptomatically based on judgement of doctor and individual reactions of patient.
2.6 Toxicity Data
No information available.
3. PRECAUTIONS FOR USE
3.1 Exposure Standards
None established.
3.2 Engineering Controls
Ensure adequate ventilation to keep airbourne concentrations low.
3.3 Personal Protection
Wear respirator, safety glasses, long plastic gloves and suitable work clothing.
3.4 Flammability
Not flammable, decomposes. SAFE HANDLING INFORMATION
4.1 Storage / Transport
Store in a dry, cool and well ventilated place, free from direct sunlight, rain avoiding breakage.
4.2 Packaging / Labelling UN No. 2834 Class 8 Sub Risk None Allocated Hazchem Code 2R Pack Group III EPG No. 37 Shipping Name PHOSPHOROUS ACID Hazard CORROSIVE
Risk Phrases R34 Causes burns.
Safety Phrases S26 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
4.3 Spills and Disposal
Spills
Clean-up personnel should wear full protective clothing including breathing apparatus in case of exposure.
Absorb on sand or vermiculite and place in closed containers for disposal. Ventilate area and wash spill site after material pickup is complete. Repackage wash spillages and waste with diluted alkaline solution for disposal.
Disposal
For small quantities: cautiously add to a large stirred excess of water. Adjust the pH to neutral, separate insoluble solids or liquids and package them for hazardous waste disposal. Flush the aqueous solution down the drain with plenty of water. The hydrolysis and neutralisation reactions may generate heat and fumes which can be controlled by the rate of addition. Observe all Federal, State and Local Laws
4.4 FIRE AND EXPLOSION HAZARD Fire / Explosion
Material is not flammable, but will decompose. Hazardous products of decomposition include phosphor and phosphoric acid.
Extinguishing Media
Fire-fighters should wear full protective clothing including self-contained breathing apparatus. Use extinguishing media suitable to burning media. 5 OTHER INFORMATION
Other Information
No information available.
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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