| CAS
NO. |
79-14-1; 259744-22-4 |
|
| EINECS NO. |
201-180-5 |
| FORMULA |
HOCH2COOH |
| MOL
WT. |
76.05 |
| H.S.
CODE |
|
|
TOXICITY
|
Oral rat LD50: 1950 mg/kg |
| SYNONYMS |
Hydroxyacetic Acid;
Hydroxyethanoic acid; |
|
Glycollic acid; alpha-Hydroxyacetic acid;
Kyselina glykolova; Kyselina hydroxyoctova;
2-Hydroxyacetic acid; |
|
SMILES
|
|
|
CLASSIFICATION
|
alpha-HYDROXY ACID
/ |
|
PHYSICAL AND CHEMICAL PROPERTIES
|
| PHYSICAL
STATE |
white
crystals |
| MELTING POINT |
75
- 79 C (Decomposes) |
| BOILING
POINT |
|
| SPECIFIC GRAVITY |
|
| SOLUBILITY
IN WATER |
Soluble |
| pH |
1.7
- 2.5
|
| VAPOR DENSITY |
|
|
AUTOIGNITION
|
|
|
NFPA
RATINGS
|
Health: 1; Flammability: 1; Reactivity: 0 |
|
REFRACTIVE
INDEX
|
|
| FLASH
POINT |
300
C (decomposes)
|
| STABILITY |
Stable
under ordinary conditions
|
|
GENERAL
DESCRIPTION & APPLICATIONS
|
|
Glycolic acid
is the smallest alpha-hydroxy acid (AHA) which has a hydroxyl group on the carbon atom next to
the acid group. If the hydroxy group is on the second carbon next to the acid
group, it is called beta-hydroxy acid. Glycolic acid is a low mole weight
compound but has dual functionality of alcohol and
acid. Because of its small molecular weight and size, it has a better capability
to penetrate skin. AHA is used extensively in cosmetics. It is known that it
diminishes the lines on the skin and make skins look young by acting as a
humectant to absorb moisture in air and by exfoliating action to break the bonds
between dead skin cells, Pure glycolic acid is a white
crystals; decomposes about 78
C; very
soluble in water, alcohols, acetone, acetates; slightly soluble in ethyl ether;
sparingly soluble in hydrocarbon solvents; polymerization occurs above 50
C. Commercially, it is available in
crystal form as well as in aqueous solutions of various concentrations, usually
70 percent or less. Activating both the hydroxyl and
carboxylic acid group, glycolic acid has the property to form metal complexes
and can be used in cleaning applications and hard water dissolution. Aqueous solution
grade is mainly used fro this cleaning application.
Glycolic
acid is an useful intermediate in organic synthesis including
oxidation/reduction, esterification and formation of oligomers as well as long
chain polymerization. Glycolic acid is naturally found in sugar beets, cane sugar,
and unripe grapes. It is known that it diminishes the lines on the skin and make
skins look young. Synthetic glycolic acid and its derivatives are used
commercially in leather tanning and textile dyeing; as a flavouring agent and
preservative in food processing, water treatment industries; pH control; and chemical intermediates as well as in household,
industrial, electronics cleaning applications and cosmetics. They are also used
in emulsion polymers, solvents and ink and paint additive to improve flow properties
and impart gloss. |
| SALES
SPECIFICATION |
|
70%
SOLUTION
|
|
APPEARANCE
|
clear to light yellow liquid |
| CONTENT |
70.0
± 2.0% |
| NaCL |
7.0
± 1.0%
|
| Fe |
10ppm
max
|
|
Cu
|
10ppm
max
|
|
99%
CRYSTALS
|
|
APPEARANCE
|
white
crystals
|
|
CONTENT |
99.0%
min
|
|
CHLORIDE
ION
|
0.2%
max
|
|
SULFATE
|
0.1%
max
|
|
HEAVY
METALS
|
10ppm
max
|
|
ASH
|
0.2%
max
|
|
DIOXYACETIC ACID |
Nil
|
|
CATION |
1ppm
max
|
|
FE
|
20ppm
max
|
|
CU
|
10ppm
max
|
| TRANSPORTATION |
| PACKING |
250kgs
in Drum / 25kgs in drum |
| HAZARD CLASS |
8
(Packing Group: II) |
| UN
NO. |
3261 |
| OTHER
INFORMATION |
|
Hazard
Symbols: C, Risk Phrases: 22-34, Safety Phrases: 26-36/37/39-45 |
|
PRICES
|
|
|
