Glycolic acid
MF: C2H4O3
MW: 76.05
CAS: 79-14-1
Appearance and properties: colorless and deliquescent crystals, the aqueous solution is a light yellow liquid.
Melting point (ºC): 78-79
Relative density (water = 1): 1.49
Boiling point (°C): No boiling point, decomposed into formaldehyde, and water when heated at 100°C.
Molecular formula: C2H4O3
Molecular weight: 76.05
Colorless and deliquescent crystals. It is soluble in water, soluble in organic solvents such as ethanol, slightly soluble in ether, and insoluble in hydrocarbons. It has the duality of alcohol and acid, and decomposes when heated to boiling point. Used in organic synthesis, etc. Usually produced by hydrolysis of chloroacetic acid under alkaline conditions.
1. Chemical cleaning:
70% glycolic acid solution is mainly used as a cleaning agent. The main cleaning materials for condensers, heat exchangers, etc.
2. Biodegradable materials:
It is widely used in the preparation of implanted sustained-release drug systems, implanted repair devices, bioabsorbable surgical sutures, artificial bone and organ materials, etc., with great development prospects. Polylactic acid and polyglycolic acid have become the focus of the development of new materials.
3. Bactericide:
Because glycolic acid has a special structure of hydroxyl and carboxyl groups, it can form a hydrophilic chelate with metal cations through coordination bonds, so it has a significant inhibitory effect on the growth of iron oxidizing bacteria and can be used as a bactericide. It can also be used as inhibitor in a variety of ore flotation.
4. Daily chemical products:
99% glycolic acid is a good agent for removing dead skin and hair. It can synthesize fruit acid, which is the raw material for anti-aging and whitening cosmetics, and can achieve the effects of moisturizing, moisturizing the skin and promoting epidermal renewal. Glycolic acid has a very small molecular weight. It can effectively penetrate skin pores and solve skin aging, wrinkles, dark spots, acne and other problems in a short period of time, so it is unanimously praised by the medical beauty industry.
5. Electroplating surface treatment:
glycolic acid can also be used in the electroplating industry. Sodium glycolate and potassium salt can be used as electroplating additives, as well as green chemical raw materials for electroplating grinding, metal pickling, leather dyeing and tanning agents. Glycolic acid is also a complexing agent for electroless nickel plating. It has the advantages of corrosion resistance, fast reaction, and good finish. It is the best raw material for improving the quality of electroless nickel plating.
In addition, glycolic acid can be used in the textile industry as a cross-linking coupling agent for dyeing and finishing wool fibers and cellulose fabrics or as a cross-linking catalyst for carboxyl-containing fiber fabrics; it can also be used as an adhesive, petroleum demulsifier, welding agent and coating ingredient And synthesize a variety of medicines, pesticides and chemical additives.