Thioglycolic acid Mercapto acetic acid
Structural formula
| Business number | 01F5 |
|---|---|
| Molecular formula | C2H4O2S |
| Molecular weight | 92.12 |
| label |
Thiol acetic acid, Thioglycolic acid, ethanethiol acid, Hydrothioacetic acid, thioglycolic acid, thioglycolic acid, thioacetic acid, thioacetic acid, thioglycolic acid, Thiol acetic acid, Hydrothioacetic acid, Thioglycolic acid, Mercaptoacetic acid, 2-Mercaptoacetate, 2-Mercaptoacetic acid, TGA, Cold perm chemicals, polymer chain transfer agent, metal surface treatment agent, Sensitive reagents for testing iron, molybdenum, aluminum, tin, etc. |
Numbering system
CAS number:68-11-1
MDL number:MFCD00004876
EINECS number:200-677-4
RTECS number:AI5950000
BRN number:506166
PubChem number:24900165
Physical property data
1. Properties: colorless transparent liquid with a strong unpleasant odor. [1]
2. Melting point (℃): -16.5[2]
3. Boiling point (℃): 120 (2.67kPa); 220[3]
4. Relative density (water = 1): 1.33[4]
5. Relative vapor density (air=1): 3.18[5]
6. Saturated vapor pressure (kPa): 1.47 (104~06℃) [6]
7. Critical pressure (MPa): 6.1[7]
8. Octanol/water partition coefficient: 0.09 [8]
9. Flash point (℃): 125[9]
10. Ignition temperature (℃) ): 350[10]
11. Explosion upper limit (%): No data yet
12. Explosion lower limit (%): 5.9 [11]
13. Solubility: miscible with water, miscible with ethanol and ether, and soluble in common solvents. [12]
Toxicological data
1. Acute toxicity[13] LD50: <50mg/kg (rat oral); 250mg/kg (mouse Oral)
2. Irritation No information available
Ecological data
1. Ecotoxicity No data yet
2. Biodegradability[14] MITI-I test, initial concentration 100ppm, sludge concentration 30ppm, 100% degradation after 4 weeks.
3. Non-
2. Its ammonium salt and sodium salt are mainly used as curling agents, and its calcium salt can be used as depilatory agent, low-toxic or non-toxic stabilizer of polyvinyl chloride, initiator of polymerization reaction, accelerator and chain transfer agent, metal surface treatment agent. In addition, thioglycolic acid is a sensitive reagent for the determination of iron, molybdenum, aluminum, tin, etc.; it can also be used as a crystallization nucleating agent during polypropylene processing and molding, as well as a modifier for coatings, fibers, and a blanket speed conditioner. Stabilizer raw materials for polyvinyl chloride and rubber, cold perming agents, and pharmaceutical intermediates.
3. Used as a chromogen for the photometric determination of molybdenum, rhenium, iron, etc., and as a coordinating masking agent. Its salts are also used in the preparation of cold perms and hair removers for curling hair.
4. Hair removal agent: Thioglycolate can quickly remove hair when applied to the skin under strong alkalinity. Thioglycolic acid can be used for hair removal in cosmetology, pre-clinical surgery and animal experiments. The most commonly used is the calcium salt of thioglycolic acid, and the optimal pH value is 11.5 to 12. The minimum effective content is: 5% thioglycolic acid, 7% calcium salt.
5. Adding a very small amount of thioglycolic acid to metal surface treatment agents can improve the cleaning effect of metal cleaning agents and impregnating solutions, and can inhibit corrosion of the metal surface being treated, so it is often used in precision machining of metals. of rust inhibitors. This effect is significant over a wide range of pH values. Multi-component cleaning and anti-rust fluid containing thioglycolic acid can be used for cleaning automobile cooling systems with a pH value of 10.6. Cetyl thioglycolic acid can polish or clean silver products without tarnishing the surface.
6. Polyoxyethylene low-toxic or non-toxic stabilizer octylstannic acid thioglycolate, methyl tin ester, octyl ester, 2-ethylhexyl ester, methoxybutyl ester, ethoxyethyl ester They have low toxicity and non-toxicity. Approved by the U.S. Food and Drug Administration, the above esters can be used as low-toxicity and non-toxic stabilizers. It can be used in the processing of polyvinyl chloride water pipes, water pumps and other products, food packaging, equipment pipelines in food processing plants, and can also be used in cosmetics and pharmaceutical factories, and this type of stabilizer improves product transparency and thermal stability. . In addition, this product is a sensitive reagent for the determination of iron, molybdenum, lead, tin, etc. It can also be used as fiber modifier and blanket finishing agent.
7. Used as a reagent and stabilizer for the determination of iron, in the manufacture of potions and perm lotions, etc. [22]