Factory Supply Mercaptoacetic acid liquid CAS 68-11-1 Raw Materials

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Uses and synthesis of Mercaptoacetic acid liquid

Mercaptoacetic acid liquid is a kind of organic acid, the chemical formula is C2H4O2S, it is colorless transparent liquid with strong unpleasant odor, miscible with water, miscible with ethanol, ether, soluble in common solvents, oxidized quickly in air, burned when exposed to open fire, high heat and emit poisonous hydrogen sulfide gas, Mercaptoacetic acid Raw Materials is mainly used as raw material of blanket finishing agent and cold ironing liquid. Mercaptoacetic acid Raw Materials is mainly used as raw material of blanket finishing agent and cold ironing liquid.Mercaptoacetic acid CAS 68-11-1 is colorless transparent liquid, industrial product is colorless to slightly yellow, with strong irritating odor. Miscible with water, ethanol and ether.

Applications / Functions of Mercaptoacetic acid liquid

• 1.Mercaptoacetic acid Raw Materials is used for the production of epoxy resin, catalyst of bisphenol A, the main raw material of daily-use cosmetic cold-ironing essence and depilatory agent, and also can be used as the basic raw material for the synthesis of PVC transparent plastics and heat stabilizers of organic antimony and organic tin. Its reagent products are sensitive reagents for testing iron, molybdenum, silver, tin and other metal ions. It is the inhibitor of copper sulfide and iron sulfide minerals in mineral processing. In the petrochemical industry and the railroad sector, it is used for cleaning and descaling of equipment and railroad tracks.
• 2.Mercaptoacetic acid CAS 68-11-1 is mainly used as hair curling agent, calcium salt can be used as depilatory agent, low-toxicity or non-toxicity stabilizer for PVC, initiator, accelerator and chain transfer agent for polymerization reaction, and metal surface treatment agent. In addition, mercaptoacetic acid is a sensitive reagent for the detection of iron, molybdenum, aluminum, tin, etc.; it can also be used as a nucleating agent for polypropylene processing and molding of the crystallization, as well as coatings, fibers, modifiers, carpet quick treatment agent. It is also used as raw material of stabilizer for PVC and rubber, agent for cold perm and pharmaceutical intermediate.
• 3.Mercaptoacetic acid liquid is used as a color developer for the photometric determination of molybdenum, rhenium and iron, etc., and is used as a masking agent. Its salt is also used in the preparation of curly hair cold perming agent and depilatory agent.
• 4.Hair removal agent.Mercaptoacetic acid liquid can be used for rapid hair removal when applied to the skin under strong alkaline. Mercaptoacetic acid can be used for hair removal in cosmetology, before clinical surgery and animal experiments. The most commonly used is the calcium salt of mercaptoacetic acid, the optimal ph value is 11.5~12. The minimum effective content is: 5% mercaptoacetic acid, 7% calcium salt.
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• 5. Metal surface treatment agent. Adding a very small amount of mercaptoacetic acid can improve the cleaning effect of metal cleaning agents and impregnating solution, and can inhibit the corrosion of the treated metal surface, so Mercaptoacetic acid Raw Materials is commonly used in the precision processing of metals in the rust inhibitor. This effect is significant over a wide range of ph values. Multi-component cleaning-rust preventive liquids containing mercaptoacetic acid can be used for the cleaning of automobile cooling systems, with a ph value of 10.6. The cetyl ester of Mercaptoacetic acid Raw Materials can polish or clean silver products without losing the luster of the surface of the silverware.
• 6.Polyoxyethylene low toxicity or non-toxic stabilizer.Mercaptoacetic acid CAS 68-11-1Octyl stannate, methyl stannate, octyl ester, 2-ethylhexyl ester, methoxybutyl ester, ethoxy ethyl ester and so on have low toxicity and non-toxicity, approved by U.S. FDA, the above esters can be used as a low toxicity and non-toxic stabilizers.Mercaptoacetic acid CAS 68-11-1 can be used in the processing of PVC water piping, pumps and other products, food packaging, food processing plant equipment piping, can also be used in cosmetic factories and pharmaceutical factories, and this kind of stabilizers make the product transparency and thermal stability are improved. In addition, Mercaptoacetic acid CAS 68-11-1 is a sensitive reagent for the determination of iron, molybdenum, lead, tin and so on. It can also be used as fiber modifier and blanket finishing agent.
• 7.Mercaptoacetic acid CAS 68-11-1 is used as a reagent and stabilizer for the determination of iron, and is used in the manufacture of potions and perms.
• 8.Mercaptoacetic acid liquid is used as corrosion inhibitor for oil exploration. Mercaptoacetic acid can be an excellent corrosion inhibitor for olfactory salt completion fluids. When drilling high-pressure wells in petroleum exploration, in order to protect the oil and gas reservoirs and reduce the damage to the formation, bromide-free solid-phase completion fluids need to be used, and the concentrated solution of these salts is highly corrosive, and corrosive with the rise in temperature. The only corrosion inhibitors that inhibit brine corrosion at high temperatures are sulfur-containing compounds, and mercaptoacetate reacts chemically with metals at certain temperatures to form a dense protective film of FeS, which acts as a corrosion inhibitor.

Physicochemical Property of Mercaptoacetic acid liquid

Mercaptoacetic acid liquid is colorless transparent liquid, industrial product is colorless to slightly yellow, with strong irritating odor. It is miscible with water, ethanol and ether. Perm products use mercaptoacetic acid to break some of the disulfide bonds in the hair to change the curvature of the hair to achieve the effect of perming and beautifying the hair. However, Mercaptoacetic Acid Raw Materials is toxic, easily absorbed through the skin and respiratory tract, causing skin damage allergies and other symptoms, and even affecting the metabolism of the body, long-term exposure will cause damage to a variety of tissues and organs, and has a strong mutagenicity and reproductive toxicity. Therefore, it needs to be strictly controlled.

production methodprocess of Mercaptoacetic acid liquid

1. Mercaptoacetic acid Raw Materials is obtained by the reaction of inorganic or organic sulfur-containing compounds with sodium and potassium salts of monochloroacetic acid. Such as: monochloroacetic acid and sodium sulfide, sulfur reaction to generate dithiobisacetic acid, and then use zinc and acid reduction; or thiocarbamate and monochloroacetic acid reaction, the product of hydrolysis; monochloroacetic acid and thiourea reaction, generating isothiourea generation of acetic acid, and then transformed into a precipitate of barium hydroxide, and then made of aqueous mercaptoacetic acid acid acid solution by sulfuric acid acid, can be made by evaporation of the 60%-70% solution, the yield of more than 70%.
2. At a temperature not exceeding 25 ℃, the sodium carbonate solution added to chloroacetic acid to ph value 7 ~ 8, and then add the thiourea reaction to generate urea acetate, the resulting thiourea acetate in the insulation 78 ~ 80 ℃ and sodium hydroxide reaction for 2h, the end of the reaction is cooled to 40 ℃, add concentrated hydrochloric acid to the ph value of 3, and then extracted with ether, extracted from the ether layer added to the activated carbon after sufficient mixing and filtration, filtrate with zinc powder After distillation under reduced pressure, Mercaptoacetic acid liquid was obtained.
3. Mix 16% aqueous chloroacetic acid solution with 15% aqueous potassium hydrosulfide solution under stirring, ClCH2COOH∶KHS=1∶2 (molar ratio). Heat, add the same amount of barium chloride saturated solution with the same amount of chloroacetic acid, and then add 25% of concentrated ammonia, stirred well, static, filtration, filtrate, and then add an equal volume of concentrated hydrochloric acid, and then extracted with ether, distillation to remove the ether, and finally, distillation at 2000Pa, collect 104~106 ℃ fractions, that is, to get the finished product Mercaptoacetic acid liquid.
4. Sodium hydrosulfide and chloroacetic acid are used to produce Mercaptoacetic acid Raw Materials under the action of hydrogen sulfide and nitrogen.
5. Chloroacetic acid, sodium thiosulfate and sodium hydroxide are synthesized, then Mercaptoacetic acid liquid is obtained by acidolysis, extraction and distillation.

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