Thioglycolic Acid

(Mercaptoacetic Acid), CAS# 68-11-1, EC# 200-677-4


Thioglycolic Acid (TGA) was first developed in the early 1940s by Dr. Ralph Evans in Hoboken, New Jersey, as an active material for cold wave permanents. Todays mainly TGA salts are used in cosmetic applications for hair perms, straighteners and depilatories.

Another major use for TGA in its ester form is as a key raw material in the manufacture of organotin heat-stabilizers for PVC. These esters can also be used as chain transfer agents in solvent based polymerisations.

Other applications were developed soon after in the pharmaceutical, agrochemical, leather processing industries. TGA can also be used as a water-soluble chain transfer agent for certain acrylic polymers. The anti-corrosive properties of TGA or its salts are useful in the oil field sector in down-hole applications and as cleaning agents.

TGA esters

The esters of TGA, such as 2-Ethylhexyl Thioglycolate (-mercaptoacetate), also called  2-EHTG, and Iso-Octyl Thioglycolate (-mercaptoacetate), also called IOTG  react like regular mercaptans and show long term stability. Both are also key intermediates in the manufacture of tin heat-stabilizers for PVC.

TGA Salts

TGA salts such as Ammonium Thioglycolate or Monoethanolamine Thioglycolate are used in cosmetics for hair perms and straigtheners whereas Calcium Thioglycolate and Potassium Thioglycolate are used in depilatories.


TGA's unique reducing properties make it an ideal candidate for a wide variety of chemical reactions including addition, elimination, or cyclization reactions. TGA's thiol group (-SH) will react in the presence of bases, acids, ketone groups or organic halogens. In the presence of alcohols or amines, the carboxylic group will react preferentially.

Production Facilities

As the leading producers of TGA, its esters and salts, BRUNO BOCK and EVANS CHEMETICS are providing state of the art quality from their production facilities in Marschacht, Germany (near Hamburg),  and Waterloo New York, USA and excellent customer service from their sales offices in Marschacht and Teaneck, New Jersey, in the USA.

Market / Applications

Thioglycolic Acid is produced by BRUNO BOCK and EVANS CHEMETICS as ultrapure, low odor quality for cosmetic applications or as pure quality or technical grade for all other applications. It is used worldwide in a wide variety of applications:

Details to Thioglycolic Acid

Product NameConc.Version
Thioglycolic Acid (Mercaptoacetic Acid)80 %
80 %
85 %
99 %
99 %

70 %
80 %
85 %
97 %
98 %
99 %
cosmetic grade
cosmetic grade low odor
cosmetic grade
cosmetic grade
cosmeitc grade low odor 

technical grade
technical grade
technical grade
technical grade
commercial grade


Products MSDS Datasheet
    Thioglycolic Acid (Mercaptoacetic Acid)
  • 80 % cosmetic grade
  • 80 % cosmetic grade low odor
  • 85 % cosmetic grade
  • 99 % cosmetic grade
  • 99 % cosmetic grade low odor
  • 70 % technical grade
  • 80 % pure
  • 85 % technical grade
  • 97 % technical grade
  • 98 % commercial grade
  • 99 % pure