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Oxalic acid dihydrate

CAS Number
6153-56-6
EC Number
612-167-2
Chemical Formula
C2H2O4.2H2O
Molecular Weight
126.07 g/mol

Description

Oxalic acid dihydrate (CAS 6153-56-6 ) is the stable, crystalline hydrated form of oxalic acid, commonly supplied for industrial use where controlled dissolution and handling are preferred over the anhydrous form. It functions as an organic acid, chelating agent, and reducing agent across a broad range of manufacturing and treatment processes. In textile and leather processing, it removes rust stains and iron deposits. It effectively eliminates mineral scale from fabrics and hides without damaging fiber structure. Water treatment operations use it to control metal ion concentrations and adjust pH in various process streams. In cleaning and maintenance formulations, it is the active acid component in rust removers, tile cleaners, and metal brightening products. It is highly valued for its ability to restore surfaces. Pharmaceutical manufacturers use it as a reagent and pH modifier in synthesis and as a precipitating agent for isolating specific compounds. It is supplied as white crystalline powder or granules. Granule size is available in various mesh specifications depending on application requirements. Standard commercial grades include technical grade for industrial cleaning and processing applications. Higher-purity grades meeting USP or Ph. Eur. specifications are available for pharmaceutical applications. Bulk supply is typically offered in bags or supersacks for large scale operations. Smaller packagings are also available for laboratory or specialty use. This ensures flexibility for diverse industrial requirements and precise chemical handling across different sectors. Contact us for supply of Oxalic acid dihydrate Request Quote

Other Names (Synonyms)

Oxalic Acid | Ethanedioic acid hydrate (1:2) | Ethanedioic Acid

Key Technical Features

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

Physical Properties

Melting Point102 °C
Boiling Point102 °C
Density1.65 g/cm³ @ Temp: 25 °C
Flash Point157°C
Appearancewhite crystals
ColorYellow to yellow-green
FormPowder/Solid
Water Solubility138 g/L (20 ºC)
Vapor Pressure<0.01 mm Hg ( 20 °C)
pH~1.0 (25℃, 1M in H2O)

Safety & Handling

Danger
GHS05· CorrosiveGHS07· IrritantGHS08· 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
H373May causes damage to organs through prolonged or repeated exposure H302+
H312Harmful if swallowed or in contact with skin

Precautionary Statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.
P264Wash … thoroughly after handling.
P270Do not eat, drink or smoke when using this product.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P316Get emergency medical help immediately.
P317Get emergency medical help.
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.
P317Get emergency medical help.
P364Take off contaminated clothing and wash it before reuse.
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 Code29171100
UN Number3261
ADR Class8
Packing GroupIII
WGK (Germany)1