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- Chemical Name: Mercaptoacetic acid
- CAS No.: 68-11-1
- Molecular Fomula: :C2H4O2S
- Molecular weight:92.12
- Appearance:Colorless and transparent liquid
- Sample:Available
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Description of mercapto
- Thioglycolic acid (TGA) is the organic compound HSCH2CO2H. TGA is often called mercaptoacetic acid (MAA). It contains both a thiol (mercaptan) and carboxylic acid functional groups. It is a colorless liquid with a strongly unpleasant odor. TGA is miscible with polar organic solvents.
Basic Info of mercapto
Basic Info
Numbering system
Properties
Safety Info
Basic Info
Chemical Name | thioglycolic acid |
Synonyms | TGA;Thiovanic acid;2-mercapto acetic acid;usafcb-35;Thioglycolate;Expand |
CAS No. | 68-11-1 |
Molecular Formula | C2H4O2S |
Molecular Weight | 92.11700 |
PSA | 76.10000 |
LogP | 0.00080 |
Numbering system
MDL number | MFCD00004876 |
RTECS number | AI5950000 |
EINECS number | 200-677-4 |
Properties
Appearance & Physical State | Clear liquid |
Density | 1.325 |
Boiling Point | 96ºC (5 mmHg) |
Melting Point | -16ºC |
Flash Point | 126ºC |
Refractive Index | 1.503-1.505 |
Water Solubility | soluble |
Stability | Stable at room temperature in closed containers under normal storage and handling conditions. Oxidizes when exposed to air. |
Storage Condition | 2-8ºC |
Vapor Density | 3.2 (vs air) |
Vapor Pressure | 0.4 mm Hg ( 25 °C) |
Safety Info
RTECS | AI5950000 |
Hazard Class | 8 |
Safety Statements | S23-S25-S27-S28-S36/37-S45 |
HS Code | 2930909090 |
Packing Group | II |
WGK Germany | 1 |
RIDADR | UN 1940/2436 |
Risk Statements | R24/25; R26; R34 |
Hazard Codes | T+ |
Signal Word | Danger |
Caution Statement | P280; P301 + P310 + P330; P303 + P361 + P353; P304 + P340 + P310; P305 + P351 + P338; P403 + P233 |
Hazard Declaration | H301 + H311 + H331; H314 |
Symbol | GHS05, GHS06 |
What is Mercaptoacetic acid?
- With the progress of science and technology and the development of society, chemical products have invariably permeated our daily lives, in medicine, food, cosmetics, electronics, industry, and other areas, becoming an essential part of our lives. One such product is Mercaptoacetic acid which has developed particularly rapidly in recent years. Do you know about Mercaptoacetic acid?
- The official answer: The pure product is colorless and transparent liquid, the industrial product is colorless to slightly yellow. It can be miscible with water, ethanol, and ether. Melting point -16°C(lit.) Boiling point 96°C5mmHg(lit.) Density 1.326g/mLat20°C(lit.) Vapor density 3.2(fair) Vapor pressure 0.4mmHg(25°C) Refractive index n20/D1.505(lit.)
What’s the application of Mercaptoacetic acid?
- TGA is characterized by reactions with both hydroxy acids and sulfhydryl groups, the most important of which is the reaction with disulfides. In particular, it reacts with cysteine in a hair under alkaline conditions, cutting the (-S-S-) bond of cysteine to produce cysteine that can be easily curled. It is mainly used as a curing agent, depilatory agent, low or non-toxic stabilizer of polyvinyl chloride, initiator, accelerator and chain transfer agent of the polymerization reaction, and metal surface treatment agent. In addition, thioglycolic acid is a sensitive reagent for detecting iron, molybdenum, aluminum, tin, etc. It is also used as a crystalline nucleating agent in the processing and molding of polypropylene, as well as a modifier for paint and fiber, and a quick-conditioning agent for felts. It is also an important raw material for the synthesis of cysteine, hormonal agents, industrial disinfectants, and synthetic sulfuric acid. Besides being used as an intermediate of Cefivitril, mercaptoacetic acid is also widely used as a hair curling agent, hair removal agent, low or non-toxic stabilizer of PVC, metal surface treatment agent, and initiator, accelerator, and chain transfer agent of the polymerization reaction.
Conclusion
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