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| MATERIAL SAFETY DATA SHEET - PHOSPHORIC ACID |
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| SL NO. |
PARTICULARS |
PRODUCT DETAILS |
| 1.0 |
IDENTITY OF MATERIAL |
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| 1.1 |
Product Name |
Phosphoric Acid |
| 1.2 |
Trade Name |
N/A |
| 1.3 |
Chemical Designation |
Acid |
| 1.4 |
Synonyms |
Orthophosphoric acid, hydrogen phosphate, O-phosphoric acid |
| 1.5 |
Formula |
H3PO4 |
| 1.6 |
Label Class |
Corrosive |
| 1.7 |
Category |
Acid |
| 1.8 |
CAS Number |
7664-38-2 |
| 1.9 |
UN Number |
2834 |
| 1.10 |
Regulated Identification |
Phosphoric acid |
| 1.11 |
Shipping Name |
Phosphoric acid |
| 1.12 |
Codes/Label |
8;Packing Group-III; Label : Corrosive. |
| 1.13 |
HAZCHEM Code |
None |
| 1.14 |
Hazardous Waste Identification No. |
None |
| 1.15 |
Hazardous Ingredients with CAS No. |
None |
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| 2.0 |
PHYSICAL & CHEMICAL PROPERTIES |
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| 2.1 |
Physical State (Gas/liquid/solid) |
Liquid or crystals |
| 2.2 |
Appearance |
Colourless to green syrupy liquid or rhombic crystals. |
| 2.3 |
Odour |
Odourless |
| 2.4 |
Others (Corrosivity, etc..) |
Corrosive to metals & alloys |
| 2.5 |
Boiling Point |
213 degC 42.4º |
| 2.6 |
Melting Point |
42.35ºC, loses ½ H2O @213º |
| 2.7 |
Vapour Density (air=1) |
3.4 @ 213 degC |
| 2.8 |
Specific Gravity (water=1) |
1.69 at 18 degC ; 1.874 at 25 degC (depending on concentration) |
| 2.9 |
Vapour Pressure |
0.0285 mm@20º C |
| 2.10 |
Evaporation rate |
N/A |
| 2.11 |
Solubility in water |
Miscible with water. Soluble in ethanol, 3:1 mixture of ether:alcohol |
| 2.12 |
pH |
< 2.0 |
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| 3.0 |
FIRE AND EXPLOSIVE HAZARDS DATA |
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| 3.1 |
Explosion/Flammability |
| a) Mixtures with nitromethane are explosive |
| b) Reacts with chlorides + stainless steel to form explosive H2 |
| c) Potentially violent reaction with sodium tetrahydroborate |
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| 3.2 |
Flash Point LEL % UEL % |
Not applicable, non-combustible liquid |
| 3.3 |
Auto ignition |
N/A |
| 3.4 |
TDG Flammability (Classification) |
Non-combustible liquid |
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| 4.0 |
REACTIVE HAZARDS: |
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| 4.1 |
Stability |
Phosphoric acid is stable at room temperature in closed containers under normal storage and handling conditions. |
| 4.2 |
Impact (Haz. Combustion products) |
Thermal oxidative decomposition can produce pyrophosphoric acid at 213 degC, phosphorus oxides, phosphine. |
| 4.3 |
Static Discharge (Haz. Combustion products) |
N/A |
| 4.4 |
Reactivity (Conditions to avoid) |
Ignition sources, water seepage |
| 4.5 |
Hazardous Polymerization |
Can occur with epoxides, azo compounds and polymerizable compounds. |
| 4.6 |
Incompatibility |
Strong bases, metals and alloys, nitromethane, sodium tetrahydroborate, aldehydes, amines, amides, alcohols, glycols, azo-compounds, carbamates, esters, phenols, cresols, ketones, organophosphates, epozides, explosives, combustible materials, unsaturated halides, organic peroxides, sulphides, mercaptans, cyanides, halogenated organics, nickel carbonate. Do not mix solutions Containing bleach or ammonia. |
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| 5.0 |
HEALTH HAZARD DATA |
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| 5.1 |
Routes of entry |
Ingestion, inhalation & skin |
| 5.2 |
Effects of exposure/symptoms |
| Ingestion: Severe pain & burning of oesophagus, nausea, vomiting & diarrhoea. |
| Inhalation: Vapour or mist may be irritant to mucous membranes and respiratory tract. |
| Skin: Contact with skin will result in severe irritation. Repeated or prolonged skin contact may cause burns & permanent damage. |
| Eye: A severe eye irritant. May cause severe irreversible damage. |
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| 5.3 |
LD50 (in rat) oral |
1530 mg/kg |
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LD50 (in rat) dermal |
2740 mg/kg |
| 5.4 |
Humans: TCLO > 850 mg/m3/hr |
Phosphine - 220 mg.h/m3 |
| 5.5 |
Permissible exposure Limit (PEL) |
TWA 1 mg/m3; STEL 3 mg/m3 |
| 5.6 |
Threshold limit value (TLV or ACGIH) |
TWA 1 mg/m3; STEL 3 mg/m3 |
| 5.7 |
Emergency treatment |
| Ingestion: If swallowed, rinse mouth with water, give water to drink. DO NOT INDUCE VOMITING. If vomiting occurs give more water to drink to assist in dilution. Seek immediate medical assistance. |
| Inhalation: Remove patient from exposure & keep warm. If breathing is labored & patient cyanotic (blue) ensure airways are clear and have oxygen administered. If breathing stops provide artificial breathing. |
| Skin: Remove contaminated clothing & wash before reuse. Wash exposed area with plenty of soap and water. If irritation persists, consult physician. |
| Eye: Immediately irrigate with plenty of water for at least 15 minutes. Keep eyelids open |
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| 6.0 |
HAZARD SPECIFICATION |
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| 6.1 |
NEPA Hazard Signal |
Corrosive |
| 6.2 |
Health |
3 |
| 6.3 |
Flammability |
0 |
| 6.4 |
Stability |
0 |
| 6.5 |
Special |
---- |
| 6.6 |
KNOWN HAZARDS |
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Combustible liquid: |
No |
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Flammable material: |
No |
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Pyrophonic Material: |
No |
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Unstable Material: |
No |
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Explosive Material: |
No |
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Water reactivity: |
Yes |
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Oxidizer: |
No |
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Organic Peroxide: |
No |
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Corrosive Material: |
Yes |
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Compressed Gas: |
No |
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Irritant: |
Yes |
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Sensitizer: |
No |
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Carcinogen: |
No |
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Mutagen: |
No |
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Others (Specify): |
---- |
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| 7.0 |
SAFE USAGE DATA |
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| 7.1 |
Ventilation: General/Mechanical Local Exhaust |
Provide general or local exhaust ventilation to maintain air borne concentration below OSHA PELs. Local exhaust is preferred to avoid contaminant dispersion into work area by controlling it at its source. |
| 7.2 |
Protective Equipment |
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| 7.2.1 |
Eyes |
Wear full-face respiratory masks, splash proof chemical safety goggles. Do not wear contact lenses while handling. |
| 7.2.2 |
Respiratory |
Supply of fresh air through tube masks. |
| 7.2.3 |
Gloves |
Wear acid resistant gloves of butyl rubber, neoprene, nitrile rubber, polyethylene, and polyvinyl chloride (do not use polyvinyl-alcohol gloves). |
| 7.2.4 |
Clothing |
Wear acid resistant boots, aprons and gauntlets with a total seal to prevent skin contact. |
| 7.2.5 |
Others |
Use adequate headgear. |
| 7.3 |
Precautions |
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| 7.3.1 |
Handling & Storage |
| Store in tight containers in dry, well ventilated place. Hot phosphoric acid attacks porcelain and graniteware. |
| Do not store in plastic or polyethylene lined MS containers or stainless steel. Use HDPE containers. |
| Away from all other chemicals. |
| Store away from ignition sources. |
| Use respiratory mask, headgear and overalls. |
| Use gloves, gum boots.
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| 7.3.2 |
Others |
| Keep away from water seepage. |
| Use proper protective equipment while handling. |
| Provide eyewash near work area. |
| Wash hands before eating, drinking. |
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| 8.0 |
EMERGENCY RESPONSE DATA |
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| 8.1 |
Fire extinguishing media |
| Noncombustible liquid. Use water spray to keep containers cool, when exposed to surrounding fire. |
| Use carbon dioxide, dry chemical powder, water spray or appropriate foam. For large fires, alcohol-resistant foam may be used. |
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| 8.2 |
Special Procedures |
None |
| 8.3 |
Unusual Hazards |
Evolves explosive hydrogen gas on contact with most metals and forms detonable mixture with nitro methane. May ignite combustibles. Containers may explode when heated. |
| 8.4 |
Exposure (Inhalation, skin, eye contact, ingestion) |
Refer Point 5.7 |
| 8.5 |
Spills |
| Small spills: Cover with dry lime or soda ash, dry earth, sand or other non-combustible material and carefully scoop up material & place in closed container. |
| Do not dry sweep for clean up. Use absorbents like soil, sand or vermiculite. |
| Large spills: Isolate spill area in all directions. Eliminate ignition sources. Evacuate area. Use safety equipment & arrest leakage. |
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| 8.5.1 | Steps to be taken |
Spilled material can also be covered with sodium carbonate or mixture of soda ash and slaked lime. Mix, adding water as necessary to form slurry. The resultant solution may be discharged along with large quantity of water into sink lined with protective matting and filled with chipped marble. |
| 8.5.2 |
Waste disposal method |
After cleanup, separate solid, then precipitate with lime pH11. an anionic polymer may be added to assist in settling of the solids. If necessary, pass through dual media filtration to remove the solids and then neutralize with hydrochloric acid. The resultant sludge can be disposed of in a secure landfill. |
| 9.0 |
ADDITIONAL INFORMATION |
The use of zinc phosphide as a Rodenticide in public health was reviewed by WHO in 1972. It was concluded that it was a generally effective compound and, while highly toxic to domestic fowl, its safety record was good. The use of zinc phosphide was endorsed (WHO 1973) |
| 10.0 |
SOURCES USED |
| 1) Sax's Dangerous properties of Industrial Chemicals. |
| 2) Hazardous Substance Fact Sheet, New Jersey Department of Health & Senior Services. |
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