| Identification | |
| Name: | Phosphoric acid |
| Synonyms: | Orthophosphoric acid; PA |
| CAS: | 7664-38-2 |
| EINECS: | 231-633-2 |
| Molecular Formula: | H3PO4 |
| Molecular Weight: | 97.99 |
| InChI: | InChI=1/H3O4P/c1-5(2,3)4/h(H3,1,2,3,4) |
| Molecular Structure: |  |
| Properties | |
| Transport: | UN 3453 8/PG 3 |
| Stability: | Stable at room temperature in closed containers under normal storage and handling conditions. |
| Refractive index: | n20/D 1.433 |
| Water Solubility: | Miscible |
| Solubility: | Miscible |
| Appearance: | Clear liquid |
| Specification: | General Information: As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Wear appropriate protective clothing to prevent contact with skin and eyes. Wear a self-contained breathing apparatus (SCBA) to prevent contact with thermal decomposition products. Substance is noncombustible. Extinguishing Media: For small fires, use water spray, dry chemical, carbon dioxide or chemical foam. Use water spray to cool fire-exposed containers. Use water spray, dry chemical, carbon dioxide, or chemical foam. Handling: Wash thoroughly after handling. Use only in a well-ventilated area. Do not breathe dust, vapor, mist, or gas. Do not get in eyes, on skin, or on clothing. Use only in a chemical fume hood. Storage: Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Corrosives area. |
| Report: | Community Right-To-Know List. Reported in EPA TSCA Inventory. EPA Genetic Toxicology Program. |
| Packinggroup: | III |
| Storage Temperature: | Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep away from metals. Corrosives area. Do not store in metal containers. |
| Usage: | Phosphorous acid is used for reaction with inorganic and organic products, for water treatment, industrial and agricultural uses. It is also used to bleach industrial and cleaning supplies. |
| Safety Data | |
| Hazard Symbols |
C:Corrosive
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