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
EC number	226-540-9
ECHA InfoCard	100.024.128
PubChem	21534
Wikidata	Q2699683
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
H and P phrases	H: 290-301-317
	P: 280-301 + 310
	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 .

{\ displaystyle \ mathrm {HS {\ mathord {-}} CH_ {2} {\ mathord {-}} COOH \ + \ NH_ {4} ^ {+} \ + \ OH ^ {-} \ longrightarrow}}

{\ displaystyle \ mathrm {HS {\ mathord {-}} CH_ {2} {\ mathord {-}} COONH_ {4} \ + \ H_ {2} O}}

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).

[GESTIS-1] ↑ ^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) .

[Dieter_Lück,_Hanna_Lipp-Thoben-2] 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-3] runobock.de: Ammonium thioglycolate , accessed on November 22, 2015.

[A._Marchionini,_H.W._Spier-4] 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-5] Hans-Jürgen Bandmann, Wolfgang Dohn: The epicutaneous testing . Springer-Verlag, 1967, ISBN 3-642-49783-7 , p. 279 ( limited preview in Google Book search).