Oxalic acid dihydrate

Description

Oxalic acid dihydrate · CAS 6153-56-6 · C2H2O4.2H2O. UNII 0K2L2IJ59O. Melting Point: 101-102 °C; Melting Point: 189.5 °C; Density: 1.65 g/cm³.

Identification

CAS Registry Number	6153-56-6
PubChem CID	61373
Molecular formula	C2H2O4.2H2O
IUPAC name	oxalic acid;dihydrate
UNII (FDA)	0K2L2IJ59O

Computed Descriptors

Molecular Weight	126.07
Hydrogen Bond Donor Count	4
Hydrogen Bond Acceptor Count	6
Rotatable Bond Count	1
Exact Mass	126.01643791
Monoisotopic Mass	126.01643791
Topological Polar Surface Area	76.6
Heavy Atom Count	8
Formal Charge	0
Complexity	71.5

Physical & Chemical Properties

Melting Point	101-102 °C
Melting Point	189.5 °C
Density	1.65 g/cm³
Density	1.653 @25 °C
Vapor Pressure	0.54 [mm Hg] @105 °C
LogP	-0.81

Physical description & handling notes

• Large Crystals; Dry Powder; Other Solid; Liquid; Liquid; Other Solid
• Colorless solid; [ICSC] Colorless hygroscopic crystals; [Sigma-Aldrich MSDS]
• COLOURLESS CRYSTALS.
• Solubility in water, g/100ml at 20 °C: 13-14

Regulatory Status

GHS notification summary	1.1% (6 / 561)

GHS Hazard Classification

GHS notification summary	1.1% (6 / 561)
Reported hazard statements	H302, H312 (12.7%), H315 (18.9%), H318 (39.9%), H373 (21.4%), H314

Documented Uses

• Pulp and Paper Processing [Category: Industry]
• Leather Tanning and Processing [Category: Industry]
• Photographic Processing [Category: Other]
• Textiles (Printing, Dyeing, or Finishing) [Category: Industry]
• Oxalic acid and oxalates are abundantly present in many plants, most notably fat hen (lamb's quarters), sorrel, and Oxalis species. The root and/or leaves of rhubarb and buckwheat are listed being high in oxalic acid.[8] Other edible plants that contain significant concentrations of oxalic acid include—in decreasing order—star fruit (carambola), black pepper, parsley, poppy seed, amaranth, spinach, chard, beets, cocoa, chocolate, most nuts, most berries, and beans. (L618)
• Not Known or Reasonably Ascertainable

Synonyms

Oxalic acid dihydrate; 6153-56-6; Ethanedioic acid, dihydrate; ETHANEDIOIC ACID DIHYDRATE; 0K2L2IJ59O; OXALICUM ACIDUM; DTXSID2075003; VARROMED COMPONENT OXALIC ACID DIHYDRATE; RefChem:1093935; DTXCID8043070; 612-167-2; Oxalic acid, dihydrate; MFCD00149102; OXALIC ACID (1,2-13C2); UNII-0K2L2IJ59O; Oxalicaciddihydrate

Frequently Asked Questions

What are the CAS number and molecular formula of Oxalic acid dihydrate?

CAS 6153-56-6; molecular formula C2H2O4.2H2O; molecular weight — g/mol.

What other names is Oxalic acid dihydrate known by?

Oxalic acid dihydrate, 6153-56-6, Ethanedioic acid, dihydrate, ETHANEDIOIC ACID DIHYDRATE, 0K2L2IJ59O, OXALICUM ACIDUM.

Is Oxalic acid dihydrate classified as hazardous?

1.1% of GHS notifications report no hazard classification (6 of 561).

What are the key physical properties of Oxalic acid dihydrate?

Melting Point: 101-102 °C; Melting Point: 189.5 °C; Density: 1.65 g/cm³; Density: 1.653 @25 °C.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.