| Formula / Notation | H3PO4 |
|---|---|
| CAS Number | 7664-38-2 |
| Molecular Weight | 97.995 |
| Melting Point | 108 °F (NIOSH, 2024) |
| Boiling Point | greater than 266 °F at 760 mmHg (USCG, 1999) |
| Density | 1.892 at 77 °F (USCG, 1999) - Denser than water; will sink |
| Solubility | Miscible (NIOSH, 2024) |
| Appearance | Phosphoric acid appears as a clear colorless liquid or transparent crystalline solid. The pure solid melts at 42.35 °C and has a density of 1.834 g / cm3. Liquid is usually an 85% aqueous solution... |
| Also Known As | 7664-38-2; ORTHOPHOSPHORIC ACID; o-Phosphoric acid; Wc-reiniger; Acidum phosphoricum; Sonac; Phosphorsaeure; Evits; Acide phosphorique; Phosphoricum acidum |
| Category | Acids |
What is Phosphoric acid?
Phosphoric acid is a phosphorus oxoacid that consists of one oxo and three hydroxy groups joined covalently to a central phosphorus atom. It has a role as a NMR chemical shift reference compound, a fertilizer, a solvent, a human metabolite and an algal metabolite. It is a conjugate acid of a phosphate ion and a dihydrogenphosphate.
Formula & Notation
IUPAC Name: phosphoric acid
Other Names / Synonyms: 7664-38-2; ORTHOPHOSPHORIC ACID; o-Phosphoric acid; Wc-reiniger; Acidum phosphoricum; Sonac; Phosphorsaeure; Evits; Acide phosphorique; Phosphoricum acidum
Properties & Characteristics
Physical Data
| Property | Value |
|---|---|
| Melting Point | 108 °F (NIOSH, 2024) |
| Boiling Point | greater than 266 °F at 760 mmHg (USCG, 1999) |
| Density | 1.892 at 77 °F (USCG, 1999) - Denser than water; will sink |
| Molecular Weight | 97.995 |
| Solubility | Miscible (NIOSH, 2024) |
| Appearance | Phosphoric acid appears as a clear colorless liquid or transparent crystalline solid. The pure solid melts at 42.35 °C and has a density of 1.834 g / cm3. Liquid is usually an 85% aqueous solution... |
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Phosphoric acid is a phosphorus oxoacid that consists of one oxo and three hydroxy groups joined covalently to a central phosphorus atom. It has a role as a NMR chemical shift reference compound, a fertilizer, a solvent, a human metabolite and an algal metabolite. It is a conjugate acid of a phosphate ion and a dihydrogenphosphate.
Used in industrial chemical synthesis, fertilizer production, battery electrolytes, metal processing, and laboratory acid-base reactions.
Corrosive. Causes severe burns to skin, eyes, and respiratory tract. Wear appropriate PPE including gloves, goggles, and lab coat. Consult SDS before use.
The formula or notation for Phosphoric acid is: H3PO4