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Glyoxylic acid

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Glyoxylic acid Basic information

Product Name:
Glyoxylic acid
Synonyms:
  • alpha-ketoaceticacid
  • ACETIC ACID, OXO-
  • GA
  • GLYOXALIC ACID
  • GLYOXYLIC ACID
  • oxo-aceticaci
  • oxo-acetic acid
  • Glyoxylic acid, 50 wt.% solution in H2O
CAS:
298-12-4
MF:
C2H2O3
MW:
74.04
EINECS:
206-058-5
Product Categories:
  • Pharmaceutical Intermediates
  • Chemical raw materials
  • intermediates and semifinished medicines
  • bc0001
  • 298-12-4
Mol File:
298-12-4.mol
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Glyoxylic acid Chemical Properties

Melting point:
-93°C
Boiling point:
111°C
Density 
1.33 g/mL at 20 °C
vapor pressure 
14hPa at 19.85℃
refractive index 
n20/D 1.414
Flash point:
111°C
storage temp. 
Store below +30°C.
solubility 
Miscible with ethanol. Slightly miscible with ether and benzene. Immiscible with esters.
pka
3.18(at 25℃)
form 
clear liquid
color 
Colorless to Light orange to Yellow
Water Solubility 
miscible
Merck 
14,4511
BRN 
741891
InChIKey
HHLFWLYXYJOTON-UHFFFAOYSA-N
LogP
-0.930 (est)
CAS DataBase Reference
298-12-4(CAS DataBase Reference)
NIST Chemistry Reference
Acetic acid, oxo-(298-12-4)
EPA Substance Registry System
Acetic acid, 2-oxo- (298-12-4)
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Safety Information

Hazard Codes 
C,Xi
Risk Statements 
34-43-41
Safety Statements 
26-36/37/39-45-37/39-24
RIDADR 
UN 3265 8/PG 2
WGK Germany 
1
RTECS 
MD4550000
TSCA 
Yes
HazardClass 
8
PackingGroup 
III
HS Code 
29183000
Hazardous Substances Data
298-12-4(Hazardous Substances Data)
Toxicity
rat,LDLo,intramuscular,250mg/kg (250mg/kg),Bolletino della Societe Italiana di Biologia Sperimentale. Vol. 36, Pg. 1937, 1960.

MSDS

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Glyoxylic acid Usage And Synthesis

Chemical Properties

Colorless clear liquid.

Uses

Glyoxalic acid can be used in the synthesis of a variety of reactions.
Glyoxylic acid is used in Hopkins Cole reaction, which is used in the detection of tryptophan in proteins.
It reacts with phenol to get 4-hydroxymandelic acid, which on further reaction with ammonia gives hydroxyphenylglycine, as a precursor to the drug amoxicillin.
It is also used as a starting material for the preparation of 4-hydroxyphenylacetic acid, which is used to get atenolol.

Definition

ChEBI: A 2-oxo monocarboxylic acid that is acetic acid bearing an oxo group at the alpha carbon atom.

General Description

Supplied as a 50% aqueous solution.

Health Hazard

Contact will cause severe eye and skin burns. Vapor exposure may cause eye and skin irritation.

Flammability and Explosibility

Non flammable

Biological Activity

nsc 27785 is an organic compound that is both an aldehyde and a carboxylic acid.

Synthesis

Add to 3500ml reactor equipped with reflux condenser, stirrer and thermometer300ml (3.55mol) of 50% glyoxal solution, stir and cool, control the temperature to 7±2,Slowly drip 300ml (3.55mol) of 35% hydrogen peroxide solution at the same time within 3 hours,280ml (0.355mol) of 17% ferrous sulfate solution and 120ml (0.75mol) of 15% aqueous ammonia solution, keep at 8±2, react for 3 hours, and let stand overnight, The reaction liquid was filtered to remove the solid by-products, and 350ml of water-carrying toluene was added to the reaction mother liquid.Heat to reflux, remove water, and distill toluene with water-carrying agent to obtain oxidation product.Add 120ml of concentrated sulfuric acid and 700ml of absolute ethanol to the oxidation products.Esterification reaction at 140°C for 3 hours, then distillation under reduced pressure, at 0.02Mpa,The esterification product was collected at 185°C.Add 120ml of 18% sulfuric acid to the esterified product and heat under stirring.The hydrolysis reaction is carried out at 95-98 for 2 hours; the hydrolysis liquid is cooled to room temperature,The precipitated white solid product was filtered, washed 4 times with 120ml of toluene each time, and dried.Obtain 180 g of the target product glyoxylic acid with a purity of 99.5% (HPLC) and a yield of 88%.Melting point is 98.1-98.6.

Source

Glyoxylic acid occurs in unripe fruit and in young green leaves. It has also been found in very young sugarbeets. Glyoxylic acid is found in plants and is a metabolite in mammalian biochemical pathways.

Environmental Fate

Glyoxylic acid's production and use as a cleaning agent for a variety of industrial applications, as a specialty chemical and biodegradable copolymer feedstock, and as an ingredient in cosmetics may result in its release to the environment through various waste streams. The pKa of glyoxylic acid is 3.3, indicating this compound will exist primarily as an anion in moist soil surfaces and anions are expected to have very high mobility in soils. If released to soil or water, glyoxylic acid is expected to biodegrade. Degradation may also occur in sunlit water through direct photolysis.

Glyoxylic acidSupplier

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