HomeProducts

Oxalic acid

CAS Number
144-62-7
EC Number
205-634-3
Chemical Formula
C2H2O4
Molecular Weight
90.03 g/mol

Description

Oxalic acid (CAS 144-62-7 ) is a dicarboxylic organic acid used across industrial processing as a reducing agent, chelating agent, and pH regulator. It removes metal ions and mineral deposits from surfaces and process streams. This chemical is a go-to reagent in cleaning, bleaching, and metal finishing operations. In water treatment and industrial cleaning, it dissolves iron oxide and rust deposits from boilers, heat exchangers, and pipework. The acid effectively cleans systems without damaging base metals. Textile and paper manufacturers use it as a bleaching and stripping agent to remove discoloration from natural fibers and pulp during production. Mining and hydrometallurgical operations rely on it to precipitate rare earth elements and other metals from leach solutions. This process is essential for recovering valuable materials during ore processing. In personal care formulations, it functions as a pH adjuster and chelating agent. It is commonly found in hair bleaching and skin-lightening products to ensure stability and efficacy in the final formula. The product is supplied as a white crystalline powder or granules, with anhydrous and dihydrate forms available. Standard grades include technical, industrial, and pharmaceutical-grade material for various uses. Purity levels typically range from 99% to 99.6% to meet strict industry requirements. Packaging options span from small bags to bulk quantities, supporting both laboratory-scale and large industrial supply. Contact us for supply of Oxalic acid Request Quote

Other Names (Synonyms)

oxalic acid anhydrous | HOOCCOOH | H2ox | ethanedionic acid | ethanedioic acid | ethane-1,2-dioic acid | (COOH)2 | hydrogen oxalate

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point189.5 °C (decomp)
Boiling Point158 °C
Density1.9 g/cm³
Flash Point101-157°C
AppearanceOxalic acid is a colorless, odorless powder, or granular solid. The anhydrous form (COOH)2 is an odorless, white solid
the solution is a colorless liquid.
ColorWhite
Odorodorless
FormLiquid
Water Solubility90 g/L (20 ºC)
Vapor Pressure<0.01 mm Hg ( 20 °C)
Refractive Index1.4261 (estimate)
pH1 (100g/l, H2O, 20℃)
Log P-1.7 at 23℃

Safety & Handling

Warning
GHS07· IrritantGHS05· CorrosiveGHS08· Health Hazard

Hazard Statements

H302Harmful if swallowed
H312Harmful in contact with skin
H314Causes severe skin burns and eye damage
H315Causes skin irritation
H318Causes serious eye damage
H335May cause respiratory irritation
H361Suspected of damaging fertility or the unborn child
H370Causes damage to organs
H371May cause damage to organs
H372Causes damage to organs through prolonged or repeated exposure
H373May causes damage to organs through prolonged or repeated exposure
H402Harmful to aquatic life
H412Harmful to aquatic life with long lasting effects

Precautionary Statements

P203Obtain, consult and follow expert instructions for use.
P260Do not breathe dust/fume/gas/mist/vapours/spray.
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P264Wash … thoroughly after handling.
P270Do not eat, drink or smoke when using this product.
P271Use only outdoors or in a well-ventilated area.
P273Avoid release to the environment.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P316Get emergency medical help immediately.
P317Get emergency medical help.
P318IF exposed or concerned, get medical advice.
P319Get medical advice/attention if you feel unwell.
P321Specific treatment (see … on this label).
P330Rinse mouth.
P363Wash contaminated clothing before reuse.
P405Store locked up.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P317Get emergency medical help.
P352IF ON SKIN: Wash with plenty of water.
P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P316Get emergency medical help immediately.
P317Get emergency medical help.
P364Take off contaminated clothing and wash it before reuse.
P233Store in a well-ventilated place. Keep container tightly closed.
P331Rinse mouth. Do NOT induce vomiting.
P354IF ON SKIN: Take off immediately all contaminated clothing. Rinse skin with water/shower.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code29171110
UN Number3261
ADR Class8
Packing GroupIII
WGK (Germany)1