Concise etchant
Phosphoric Acid is a colorless, odorless phosphorus-containing inorganic acid. Phosphoric acid is a sequestering agent which binds many divalent cations, including Fe++, Cu++, Ca++, and Mg++. — DrugBank
- IUPAC name
- hydron;phosphate
- Molecular formula
- H3O4P
- Molecular weight
- 97.995 g/mol
- Exact mass
- 97.97689557 Da
- Topological polar surface area
- 86.3 Ų
- Hydrogen-bond donors
- 3
- Hydrogen-bond acceptors
- 4
- Covalent units
- 4
- Defined stereocentres
- 0
Also known as
Evidence from additional scientific databases
NIH PubChem PUG-View
Attributed physical-property, hazard, environmental and use annotations.
- Boiling Point: 158.00 °C. @ 760.00 mm Hg Source: Human Metabolome Database (HMDB)
- LogP: -2.150 Source: Human Metabolome Database (HMDB)
- Melting Point: 41.00 to 44.00 °C. @ 760.00 mm Hg Source: Human Metabolome Database (HMDB)
- Physical Description: Solid Source: Human Metabolome Database (HMDB)
- Solubility: 1000 mg/mL Source: Human Metabolome Database (HMDB)
Mapped by: Existing checksum-valid CAS to unique PubChem CID match. Retrieved: 2026-08-31. Open source record
Scientific classifications and hazard annotations provide context and do not replace the market-specific regulatory decision shown above.
Additional source coverage and match status
| Source | Result | Checked |
|---|---|---|
| NIH PubChem PUG-View | Exact match | 2026-08-31 |
A recorded no-match is useful evidence that the source was checked; it is not a claim that the substance does not exist elsewhere.
Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.