乙醛酸

Description

Glyoxylic acid · CAS 298-12-4 · C2H2O3. UNII JQ39C92HH6. Melting Point: 98; Melting Point: 98 °C; Melting Point: -93 °C.

Identification

CAS Registry Number	298-12-4
PubChem CID	760
Molecular formula	C2H2O3
IUPAC name	oxaldehydic acid
UNII (FDA)	JQ39C92HH6

Computed Descriptors

Molecular Weight	74.04
XLogP3	-0.3
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	3
Rotatable Bond Count	1
Exact Mass	74.000393922
Monoisotopic Mass	74.000393922
Topological Polar Surface Area	54.4
Heavy Atom Count	5
Formal Charge	0

Physical & Chemical Properties

Melting Point	98
Melting Point	98 °C
Melting Point	-93 °C
Density	1.42 @ 20 °C/4 °C
Vapor Pressure	1.06 [mmHg]
LogP	log Kow= -0.07
Dissociation Constants	3.3 (at 25 °C)
Dissociation Constants	pKa = 3.30 @ 25 °C
Formulations/Preparations	SUPPLIED AS A 50% SOLN ... .

Physical description & handling notes

• Supplied as a 50% aqueous solution. Colorless to straw yellow. (USCG, 1999)
• CBI; Liquid
• Solid with an obnoxious odor; Deliquesces quickly to form a syrup in contact with air; [Merck Index] Found as colorless to straw-yellow 50% aqueous solution; [CAMEO] 50% aqueous solution is colorless to light yellow viscous liquid; [MSDSonline]
• Liquid
• Monoclinic crystals from water
• Rhombic prisms obtained from water with 1/2 mol of water of crystallization.

GHS Hazard Classification

Reported hazard statements	H317, H318, H290 (60.6%), H319

Documented Uses

• Found in unripe fruit, young green leaves, and very young sugar beets; [Merck Index] Used to make flavorings, perfumes, cosmetics, pharmaceuticals, dyes, plastics, agricultural chemicals, and vanillin; Also used as a cleaning agent for a variety of industrial applications; [HSDB]
• INTERMEDIATE FOR FLAVORINGS, PERFUMES, PHARMACEUTICALS, DYES, PLASTICS, AGRICULTURAL CHEMICALS.
• Cleaning agent for a variety of industrial applications, as a speciality chemical and biodegradable copolymer feedstock.
• Not Known or Reasonably Ascertainable
• Information on 3 consumer products that contain Glyoxylic Acid in the following categories is provided:
• Prepd by heating dibromoacetic acid with some water; by electrolytic reduction of oxalic acid; by action of Aspergillus niger on calcium acetate, malonic or citric acid.

Synonyms

glyoxylic acid; 298-12-4; 2-Oxoacetic Acid; Glyoxalic acid; Oxoacetic acid; Oxoethanoic acid; Formylformic acid; Acetic acid, oxo-; Oxalaldehydic acid; oxaldehydic acid; glyoxylate; alpha-Ketoacetic acid; Formic acid, formyl-; glyoxalate; Kyselina glyoxylova; JQ39C92HH6

Frequently Asked Questions

What are the CAS number and molecular formula of Glyoxylic acid?

CAS 298-12-4; molecular formula C2H2O3; molecular weight — g/mol.

What other names is Glyoxylic acid known by?

glyoxylic acid, 298-12-4, 2-Oxoacetic Acid, Glyoxalic acid, Oxoacetic acid, Oxoethanoic acid.

Is Glyoxylic acid classified as hazardous?

Hazard statements reported: H317, H318, H290, H319.

What are the key physical properties of Glyoxylic acid?

Melting Point: 98; Melting Point: 98 °C; Melting Point: -93 °C; Density: 1.42 @ 20 °C/4 °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.