CAS 7664-38-2: Phosphoric acid
Description:Phosphoric acid, with the CAS number 7664-38-2, is a colorless, odorless, and viscous liquid that is highly soluble in water. It is a triprotic acid, meaning it can donate three protons (H⁺ ions) in aqueous solutions, resulting in a pH that can vary significantly depending on concentration. Phosphoric acid is commonly used in fertilizers, food flavoring, and as a rust remover due to its ability to react with metal oxides. It has a relatively low toxicity compared to other acids, but it can still cause irritation to the skin, eyes, and respiratory tract upon contact. The substance is hygroscopic, meaning it can absorb moisture from the air, and it has a high boiling point relative to many other acids. In terms of chemical reactivity, phosphoric acid can participate in various reactions, including esterification and neutralization, making it a versatile compound in both industrial and laboratory settings. Its ability to form phosphates is crucial in biological systems, particularly in energy transfer processes like ATP.
Formula:H3PO4
InChI:InChI=1S/H3O4P/c1-5(2,3)4/h(H3,1,2,3,4)
InChI key:InChIKey=NBIIXXVUZAFLBC-UHFFFAOYSA-N
SMILES:O=P(O)(O)O
- Synonyms:
- 3M Etching Liquid
- Acide orthophosphorique
- Acide phosphorique
- Acidic Phosphates
- Acido Ortofosforico
- Acido fosforico
- Acidum phosphoricum
- Amberphos 54
- Anhydrous phosphoric acid
- C 134
- See more synonyms
- C 134 (acid)
- C 434
- C 434 (acid)
- Conditioner 36
- Decon 4512
- E 338
- EVITs
- Etchalite
- Fosforsyre
- Hq 54
- K Etchant Gel
- K-etchant
- Kefo
- Kerr Etchant
- Mikro Klene DF
- Nsc 80804
- Orthophosphoric Acid
- Orthophosphorsaure
- Panavia Etching Agent
- Pc 400
- Phosphoric Acid AR
- Phosphorsaeure Ueber 10% Bis 20%
- Phosphorsaeure Ueber 20%
- Phosphorsaeure Ueber 5% Bis 10%
- Phosphorsaeure Unter Und Bis 5%
- Phosphorsäure
- SF 1 (acid)
- SPA 2 (catalyst)
- Sonac
- Spa 2
- Tg 434
- Total Etch
- Ultra-Etch Gel
- Ultradent
- Ultraetch
- Un3453
- Uni-Etch
- Vococid
- WC-Reiniger
- Y 11A06
- orthophosphoric acid H3O4P
- リン酸
Brand | Product data | Purity | Price range | Estimated delivery |
---|---|---|---|---|
![]() | Orthophosphoric Acid extrapure AR, ACS, 85% REF: SR-50056CAS: 7664-38-2 | min. 85% | - - - | Discontinued product |
![]() | Orthophosphoric Acid for HPLC & UV Spectroscopy, 85% REF: SR-38048CAS: 7664-38-2 | min. 85% | - - - | Discontinued product |
![]() | Phosphoric acid - 85% in water REF: 3D-FP45387CAS: 7664-38-2 | Min. 95% | - - - | Discontinued product |

Orthophosphoric Acid extrapure AR, ACS, 85%
Ref: SR-50056
500ml | Discontinued | Request information | |
2500ml | Discontinued | Request information |

Orthophosphoric Acid for HPLC & UV Spectroscopy, 85%
Ref: SR-38048
250ml | Discontinued | Request information | |
500ml | Discontinued | Request information | |
1000ml | Discontinued | Request information |

Phosphoric acid - 85% in water
Ref: 3D-FP45387
1kg | Discontinued | Request information | |
2kg | Discontinued | Request information | |
5kg | Discontinued | Request information | |
10kg | Discontinued | Request information | |
500g | Discontinued | Request information |