basic information

Glyoxal is an organic compound with the formula C₂H₂O₂, With a molecular weight of 58.036. The appearance is white or gray-white crystalline powder (yellow angular or irregular sheet, become white after cooling), used as pharmaceutical intermediates, fabric finishing agents, dyes and dye intermediates.

Foreign name

English: glyoxal

Russian: Гликозин

physicochemical property

physical property

Appearance and properties: colorless or yellow tidal crystals or liquids, vapor is green.

CAS：107-22-2

Melting point (℃): 15

Boiling point: 51℃

Refractive index: 1.3826

Relative density (water =1): 1.14

Boiling point (℃): 50.5

molecular formula:C₂H₂O₂

Molecular weight: 58.04

Solubility: soluble in ethanol, ether, soluble in water.
chemical property

The vapor is green and burns with a purple flame. Rapid polymerization when placed, placed in water (violent reaction), or dissolved in water-containing solvents. Usually exist in various aggregate forms. The anhydrous polymer then transforms into a monomer upon heating. Heat the polymer with antipropylene anisane, phenyl ether, yellow camphor, methyl · nonylketone, or benzaldehyde. Aqueous solution contains single-molecule glyoxal, which is weakly acidic and chemically active, and can add or condense with ammonia, amide, aldehyde, and compounds containing carboxyl groups.

ualitative index

tone(Platinum-cobalt color number): 50

Free acid: 0.5%

The mass fraction of glyoxal: 30%~42%

Glycol: ethylene glycol: 1.0%

The mass fraction of formaldehyde: 1.0%

Role use

Glyoxal is mainly used in the textile industry, and the fiber treatment agent can increase the spinning and anti-wrinkle properties of cotton, nylon and other fibers, and is a durability pressing finishing agent. In Japan, this use accounts for 80% of the total consumption of glyoxal. Glyoxal is an insoluble adhesive such as gelatin, animal glue, cheese, polyvinyl alcohol and starch. Glyoxal is also used in the leather industry and in making waterproof matches. Glyoxal is the raw material for organic synthesis.2D-resin is obtained by heating and condensation of ethylene formaldehyde and urea in the presence of sodium carbonate, which is used as fabric finishing agent; glyoxal reacts with formaldehyde and ammonium sulfate to synthesize imidazole; glyoxal and the ring are used to obtain benzypyrazine: it is an intermediate of anti-tuberculosis drug pyrazinamide. Hydroxyphenylacetic acid produced by glyoxal has been industrially produced in Japan and used as an intermediate for antimicrobials and vitamin A series of products. Glyoxal is also used for the synthesis of berberine hydrochloride and sulfonamide. Also used in insecticide remover, deodorant, body preservative, sand curing agent.