Phosphoric acid
General Product Information
| Article | Phosphoric acid |
| Synonyms | Orthophosphoric acid, Trihydroxidooxidophosphorus |
| CAS No. | 7664-38-2 |
| EEG No. | 015-011-00-6 |
| EINECS No. | 231-633-2 |
| IMO | Class 8(A) |
| Tariff Code | 28092000 |
| UN No. | 1805 |
| VLG/ADR | Class 8, Package Group III |
Description
Phosphoric acid is an inorganic acid that is widely used in industrial and commercial applications. It is a colorless, odorless, viscous liquid with a strongly acidic taste. Phosphoric acid occurs in various concentrations, of which 75% and 85% aqueous solutions are most common in industry.
Characteristics
- Odor: Odorless.
- Hygroscopic: Yes.
- Color: Colorless.
- Grade: Technical.
- Solubility: Highly soluble in water.
- Strong acid: Corrosive at high concentrations.
- Shape: Liquid with a viscous consistency.
Physical & Chemical Properties
| Chemical Structure | H3PO4 |
| Molar Weight | 97,99 g/mol |
| Melting Point | 42°C |
| Boiling Point | Approx. 158°C |
| Density | 1,685 g/cm³ (at 25°C) |
| Refractive Index | – |
| pH | Approx. 1,5 (at 1M solution) |
Applications
Fosforzuur is applied in various ways, for instance:
1. Agriculture
As a raw material for phosphate fertilizers such as MAP (monoammonium phosphate) and DAP (diammonium phosphate).
2. Metalworking
For removing rust (phosphating) and surface pretreatment of metals.
3. Water Treatment
In preventing limescale and corrosion in boilers and piping systems.
4. Cleaning Agents
As an active ingredient in industrial cleaning products.
Interessing Links
- CAS Common Chemistry – Phosphoric Acid
- European Chemicals Agency (ECHA) – For chemical information and regulations.
- PubChem – Phosphoric Acid of the National Library of Medicine by the National Center for Biotechnology Information (NIH-NCBI).
- Wikipedia – Phosphoric acid