Ammonium thioglycolate
Structural formula | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
General | ||||||||||||||||
Surname | Ammonium thioglycolate | |||||||||||||||
other names |
Ammonium mercaptoacetate |
|||||||||||||||
Molecular formula | C 2 H 7 O 2 NS | |||||||||||||||
Brief description |
colorless and odorless liquid |
|||||||||||||||
External identifiers / databases | ||||||||||||||||
|
||||||||||||||||
properties | ||||||||||||||||
Molar mass | 109.15 g mol −1 | |||||||||||||||
Physical state |
liquid |
|||||||||||||||
density |
1.23 g cm −3 |
|||||||||||||||
boiling point |
approx. 100 ° C |
|||||||||||||||
solubility |
soluble in water |
|||||||||||||||
safety instructions | ||||||||||||||||
|
||||||||||||||||
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Ammonium thioglycolate is a chemical compound from the group of ammonium salts , thiols and carboxylic acid salts .
Extraction and presentation
Ammonium thioglycolate can be obtained by neutralizing thioglycolic acid with ammonium hydroxide or ammonia .
properties
Ammonium thioglycolate is a non-flammable, air-sensitive, colorless, odorless liquid that is soluble in water.
use
Ammonium thioglycolate is used as hair care for permanent waves ( cold wave ) and hair straighteners. The reducing effect of the SH group of the compound breaks down disulfide bridges in the hair structure, making it easy to give it a new shape. In a second step, the disulfide bridges are z. B. linked again with hydrogen peroxide . When straightening hair, higher pH values are used . A German company registered a patent for this application as early as 1934. The compound is also used as a stirrup fastener.
Individual evidence
- ↑ a b c d e f g h Entry on ammonium thioglycolate in the GESTIS substance database of the IFA , accessed on February 1, 2016(JavaScript required) .
- ^ A b Dieter Lück, Hanna Lipp-Thoben: Hairdressing specialist . Springer-Verlag, 2013, ISBN 978-3-322-99978-8 , pp. 192,196 ( limited preview in Google Book search).
- ↑ brunobock.de: Ammonium thioglycolate , accessed on November 22, 2015.
- ↑ A. Marchionini, HW Spier: Normal and pathological physiology of the skin I . Springer-Verlag, 2013, ISBN 978-3-642-87657-8 , pp. 393 ( limited preview in Google Book search).
- ^ Hans-Jürgen Bandmann, Wolfgang Dohn: The epicutaneous testing . Springer-Verlag, 1967, ISBN 3-642-49783-7 , p. 279 ( limited preview in Google Book search).