Oxalic acid
CAS 144-62-7C2H2O490.03 g/mol
Oxalic acid is an alpha,-dicarboxylic acid that is ethane substituted by carboxyl groups at positions 1 and 2. It has a role as a plant metabolite, a human metabolite and an algal metabolite. It is a conjugate acid of an oxalate and an oxalate(1-).
IUPAC: oxalic acid
PubChem
Physical & Chemical Properties
| Melting Point | 372 °F (Decomposes) (NTP, 1992) |
| Boiling Point | Sublimes (NIOSH, 2024) |
| Density | 1.9 at 59 °F (USCG, 1999) - Denser than water; will sink |
| Solubility | 50 to 100 mg/mL at 75 °F (NTP, 1992) |
| Vapor Pressure | 0.001 mmHg at 68 °F (NTP, 1992) |
| Appearance | Oxalic acid is an odorless white solid. 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): 2917
Data: UN Comtrade
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