Glycolic acid CAS:79-14-1 basic information

Glycolic acid (crystal)

Molecular formula: C6O4H10

CAS: 79-14-1

Characteristics: Melting point 139 ℃, boiling point 240 ℃, widely used in organic synthesis, pharmaceutical intermediates, used as a surfactant in the production of flux and solder paste, high resistance, strong activity, and has a certain effect on bright spots and full soldering power. It is the best surface active additive among all fluxes and is widely used in high-precision electronic components as a medium to high-end environmentally friendly flux. It is a halogen-free surfactant and a good substitute for dibromobutylene glycol.

Quality indicators:

Indicator Name Indicator

Superior product indicators

Appearance white crystalline powder white crystalline powder

Content,% (m/m) 99.5 ≥ 99.5

Melting point, (℃) 139.0 138-140

Loss on drying, (%) 0.5<20

Heavy metal content, (mg/l) 20<0.03

Ash content, (%) 0.03<0.03

Boiling point 240 ℃ 240 ℃

Moisture, (%) 0.03<0.5

Addition amount: 0.5-0.8%.

Packaging: 25 kilograms per barrel in cardboard drums.

Colorless and easily deliquescent crystals. Soluble in water, soluble in organic solvents such as methanol, ethanol, and ethyl acetate, slightly soluble in ether, insoluble in hydrocarbons. Having the dual properties of alcohol and acid, it decomposes when heated to boiling point. Used for organic synthesis, etc. Usually obtained by hydrolysis of chloroacetic acid under alkaline conditions.

Function and purpose

1. Chemical cleaning: A 70% solution of hydroxyacetic acid is mainly used as a cleaning agent. A mixture of 2% hydroxyacetic acid and 1% formic acid is a highly efficient and low-cost cleaning agent, which can be used as the main cleaning material for air conditioning, boilers, power plant transmission pipelines, condensers, heat exchangers, and other materials.

2. Biodegradable materials: widely used in the preparation of in vivo implantable sustained-release drug systems, implantable repair instruments, bioabsorbable surgical sutures, artificial bone and organ materials, etc., with great development prospects. Polylactic acid and polyglycolic acid have become the focus of development in the field of new materials.

3. Fungicide: Due to the special structure of hydroxyl and carboxyl groups in hydroxyacetic acid, it can form hydrophilic chelates with metal cations through coordination bonds, thus having a significant inhibitory effect on the growth of iron oxidizing bacteria. It can be used as a fungicide and also as an inhibitor in various ore flotation processes.

4. Daily chemical products: 99% hydroxyacetic acid is a highly effective agent for removing dead skin and hair. It can synthesize fruit acid, a cosmetic ingredient for anti-aging and whitening skin, and can achieve the effects of moisturizing, moisturizing the skin, and promoting epidermal renewal. Glycolic acid has a very small molecular weight and can effectively penetrate skin pores, solving problems such as skin aging, wrinkles, black spots, and acne in a short period of time. Therefore, it is unanimously praised by the medical beauty industry.

5. Electroplating surface treatment: Glycolic acid can also be used in the electroplating industry, and sodium and potassium salts of glycolic acid can be used as electroplating additives. They can also be used as green chemical raw materials for electroplating grinding, metal pickling, leather dyeing, and tanning preparations. Glycolic acid is also a complexing agent for chemical nickel plating, with advantages such as corrosion resistance, fast reaction, and good smoothness. It is the best raw material for improving the quality of chemical nickel plating.

In addition, glycolic acid is used in the textile industry