Phosphoric Acid
| Formula: | H₃PO₄ |
| CAS Number: | 7664-38-2 |
| EC Number (EINECS): | 231-633-2 |
| HS Code: | 28092000 |
| UN Number: | 1805 |
| IUPAC Name: | Orthophosphoric Acid |
| Also Known As: | Phosphoric(V) Acid; Orthophosphate Acid |
| Molecular Weight, g/mol: | 97.99 |
Typical Specifications
| Appearance: | Clear, colorless to slightly yellow liquid |
| Odor: | Odorless or faintly acidic |
| Melting Point, °C: | 42.35 |
| Boiling Point, °C: | 158 (concentrated solution, 85%) |
| Density, g/cm³ (at 20°C): | 1.685 (85% solution) |
| Flash Point, °C: | Non-flammable |
| Refractive Index (20°C): | 1.433 |
| Solubility: | Miscible with water |
| pH (1% solution): | ~1.5 |
| Purity, %: | 85–87 (technical grade) |
| Grades Available: | Technical, Food Grade (FCC) |
| Packaging: | 35kg HDPE drums, 250kg HDPE drums, bulk IBC |
Applications / Uses
Primary Applications
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Manufacture of fertilizers (superphosphate and ammonium phosphate)
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Production of detergents and cleaning agents
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Used in metal treatment, rust removal, and phosphating
Secondary Applications
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Ingredient in food & beverages as acidity regulator (E338)
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Laboratory reagent and chemical intermediate
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Production of water treatment chemicals
End Industries Served: Fertilizers, Food & Beverages, Detergents, Metal Treatment, Water Treatment, Laboratory
Safety & Handling Information
Hazard Class (GHS): Corrosive to skin and eyes (Category 1)
Hazard Statements (H-Codes):
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H314: Causes severe skin burns and eye damage
Precautionary Statements (P-Codes):
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P280: Wear protective gloves/eye protection
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P301 + P330 + P331: IF SWALLOWED – rinse mouth; do not induce vomiting
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P305 + P351 + P338: IF IN EYES – rinse cautiously with water for several minutes
Storage Conditions
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Store in a cool, dry, well-ventilated area
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Keep container tightly closed
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Avoid contact with metals, bases, and oxidizing agents
Transport Information
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ADR/RID: Class 8, UN1805, PG II
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IMDG: Class 8, UN1805
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IATA: Class 8, UN1805