Glycolic acid NEW

Chinese name: glycolic acid

English name :Glycolic acid

CAS:79-14-1

EINECS number :201-180-5

Molecular formula :C2H4O3

MDL number :MFCD00004312

Molecular weight :76.05

Appearance properties: colorless and delirious crystal, 70% of the industrial product is a light yellow liquid.

Appearance: The pure product is colorless and easy delixing crystal. The industrial product is 70% aqueous solution, light yellow liquid, with a smell similar to burnt sugar. Soluble in water, ethanol and ether.

Solubility: soluble in water, soluble in methanol, ethanol, ethyl acetate, slightly soluble in ether, insoluble in hydrocarbons.

Melting point :75-80 °C(lit.)

Boiling point :112 °C

Density :1.25 g/mL at 25 °C

Vapor pressure :10.8 hPa (80 °C)

Refractive index :n20/D 1.424

Flash point :112°C

Storage :Store below +30°C.

Solubility :H2O: 0.1g /mL, clear

Acidity coefficient (pKa):3.83(at 25℃)

Morphology: The solution may darken during storage

Color: White to off-white

PH value :2 (50g/l, H2O, 20℃)

Odor :(Odor)at 100.00 %. odorless very mild buttery

Scent Type :buttery

Water solubility: Soluble in water

Sensitivity: hygroscopicity

Merck: 14449 8

BRN:1209322

Stability: Stable. Incompatible with bases, oxidants and reducing agents.

InChIKey:AEMRFAOFKBGASW-UHFFFAOYSA-N

LogP: -1.07at 20℃

Use 1

Used in organic synthesis, daily chemical additives to replace fruit acids

Preparation method

Method one

1. Chloroacetic acid method Chloroacetic acid is hydrolyzed under alkaline conditions to obtain crude product, and then esterified by methanol to obtain methyl hydroxyacetic acid, and then distilled and hydrolyzed to obtain the finished product. 2. High temperature and high pressure method is prepared by the reaction of formaldehyde, carbon dioxide and water. 3. Cyaniding hydrolysis method is made of formaldehyde and hydrocyanic acid as raw materials, synthesized by cyaniding and acidic hydrolysis. 4. Sodium cyanide process with formaldehyde, sodium cyanide as raw materials, by adding cyanide and acid hydrolysis of two steps to prepare.