75688

Oxalic acid

puriss. p.a., anhydrous, ≥99.0% (RT)

• Synonym(s): Ethanedioic acid
• Linear Formula: HO₂CCO₂H
• CAS Number: 144-62-7
• Molecular Weight: 90.03
• Beilstein/REAXYS Number: 385686
• EC Number: 205-634-3
• MDL number: MFCD00002573
• UNSPSC Code: 12352100
• PubChem Substance ID: 57652581
• NACRES: NA.21

Properties

• grade: anhydrous; puriss. p.a.
• Quality Level: 200
• vapor density: 4.4 (vs air)
• vapor pressure: <0.01 mmHg ( 20 °C)
• assay: ≥99.0% (RT)
• form: crystals
• impurities: ≤0.001% total nitrogen (N); ≤1% water
• ign. residue: ≤0.01% (as SO₄)
• mp: 189.5 °C (dec.) (lit.)
• anion traces: chloride (Cl^-): ≤50 mg/kg; sulfate (SO₄^2-): ≤350 mg/kg
• cation traces: Ca: ≤10 mg/kg; Cd: ≤5 mg/kg; Co: ≤5 mg/kg; Cr: ≤5 mg/kg; Cu: ≤5 mg/kg; Fe: ≤35 mg/kg; K: ≤50 mg/kg; Mg: ≤5 mg/kg; Mn: ≤5 mg/kg; Na: ≤50 mg/kg; Ni: ≤5 mg/kg; Pb: ≤5 mg/kg; Zn: ≤5 mg/kg
• SMILES string: OC(=O)C(O)=O
• InChI: 1S/C2H2O4/c3-1(4)2(5)6/h(H,3,4)(H,5,6)
• InChI key: MUBZPKHOEPUJKR-UHFFFAOYSA-N
• Gene Information: human ... SRC(6714)

Description

General description

Oxalic acid is a dicarboxylic acid. It reacts with aqueous iron(II) salt solutions to afford iron(III) oxalate.

Application

Oxalic acid may be used in the preparation of the following:

• ammonium oxalate
• calcium oxalate
• chlorine dioxide (ClO₂)
• potassium hydrogenoxalate

Safety Information

• pictograms: GHS05,GHS07
• signalword: Danger
• hcodes: H302 + H312,H318
• pcodes: P264 - P280 - P301 + P312 - P302 + P352 + P312 - P305 + P351 + P338 - P362 + P364
• Hazard Classifications: Acute Tox. 4 Dermal - Acute Tox. 4 Oral - Eye Dam. 1
• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 1
• ppe: dust mask type N95 (US), Eyeshields, Gloves