Boric acid
CAS 10043-35-3BH3O361.84 g/mol
Boric acid is a member of boric acids. It has a role as an astringent. It is a conjugate acid of a dihydrogenborate.
IUPAC: boric acid
PubChem
Physical & Chemical Properties
| Melting Point | 340 °F (NTP, 1992) |
| Boiling Point | 572 °F at 760 mmHg (decomposes) (NTP, 1992) |
| Density | 1.435 at 68 °F (USCG, 1999) - Denser than water; will sink |
| Solubility | 10 to 50 mg/mL at 66 °F (NTP, 1992) |
| Vapor Pressure | 1.6X10-6 mm Hg at 25 °C (2.136X10-4 Pa); log P (in Pa) = 26.83 - 9094/T where T is deg K |
| pH | 3,8-4,8 (3,3 % aqueous solution) |
| Appearance | Boric acid is an odorless white solid. Melting point 171 °C. Sinks and mixes with water. (USCG, 1999) |
Data: PubChem · Last updated: 4/20/2026
GHS Classification
No GHS classification data available.
Classification data is sourced from ECHA.
Regulatory Compliance
TSCA
Listed
note: Status based on EPA TSCA Active Inventory · inventory name: TSCA Chemical Substance Inventory
View sourceGlobal Trade Intelligence
No trade flow data available for this chemical.
HS Code(s): 2810
Data: UN Comtrade
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