Ammoniummercaptoacetat Produkt Beschreibung

Ammonium thioglycolate  Struktur
5421-46-5
  • CAS-Nr.5421-46-5
  • Bezeichnung:Ammoniummercaptoacetat
  • Englisch Name:Ammonium thioglycolate
  • Synonyma:Ammoniummercaptoacetat
    ATG;usafmo-2;Perm salt;thiofacoa-50;Hair waving agent;(ca. 60% in Water);Ammoniumthioglykolat;AMMONIUM THIOGLYCOLATE;AMMONIUM THIOGLYCOLLATE;ammonium marcaptoacetate
  • CBNumber:CB5445341
  • Summenformel:C2H7NO2S
  • Molgewicht:109.15
  • MOL-Datei:5421-46-5.mol
Ammoniummercaptoacetat physikalisch-chemischer Eigenschaften
Sicherheit

Ammonium thioglycolate Chemische Eigenschaften,Einsatz,Produktion Methoden

  • Beschreibung Ammonium thioglycolate, also known as perm salt, is the chemical compound with the formula HSCH2CO2NH4. Being the salt of a weak acid and weak base, ammonium thioglycolic acid exists in solution as an equilibrium mixture of the salt itself as well as the free carboxylic acid thioglycolic acid (HSCH2CO2H) and ammonia : HSCH2COO- + NH4+ ? HSCH2COOH + NH3.
  • Chemische Eigenschaften Clear colorless solution with characteristic odor
  • Verwenden Solutions of various strengths are used for hair waving and for hair removal.
  • Allgemeine Beschreibung Colorless to faint pink liquid with a repulsive, skunk-like odor.
  • Air & Water Reaktionen Water soluble.
  • Reaktivität anzeigen Ammonium thioglycolate may be sensitive to heat. Ammonium thioglycolate is incompatible with acids.
  • Brandgefahr Flash point data for Ammonium thioglycolate are not available. Ammonium thioglycolate is combustible.
  • Kontakt-Allergie This substance is contained in “basic” permanent waves solutions and causes contact dermatitis in hairdressers.
  • Sicherheitsprofil Poison by intravenous and intraperitoneal routes. An allergen; can cause contact dermatitis. Emits hydrogen sulfide. See also SULFIDES. When heated to decomposition it emits very toxic NOx, SOx, and NH3.
  • Chemical concepts related to perms When discussing the chemistry of perms, one should consider two chemical facts. First is the thiol-disulfide equilibrium:
    RSH + R'SSR' ? R'SH + RSSR'
    where R and R' are organic substituents such as methyl (-CH3), ethyl (-C2H5), or -CH2COO-.
    The thiol-disulfide exchange reaction is accelerated by bases such as ammonia, because the base generates some thiolate anion (RS- ), which attacks the disulfide. Thus the ammonia plays multiple roles (and more, see below) in this application.
    The second chemical fact is that polar molecules are less volatile than nonpolar ones. So the glycolate substituent makes the thiol nonvolatile and hence non-odorous. An added advantage is that the glycolate confers some solubility in water. One could almost certainly use HSCH3 and ammonia to give a perm, but there would be serious olfactory consequences.
  • The actual chemistry of perms A solution containing ammonium thioglycolate contains a lot of free ammonia, which swells hair, rendering it permeable. The thioglycolic acid in the perm solution reduces the disulfide cystine bonds in the cortex of the hair. In a sense, the thioglycolate removes crosslinks. After washing, the hair is treated with a mild solution of hydrogen peroxide, which oxidizes the cysteines back to cystine. These new chemical bonds impart the structural rigidity necessary for a successful perm. The rigidification process is akin to the vulcanization of rubber, where commonly polysulfide linkages are used to crosslink the polymer chains. However, not as many disulfide bonds are reformed as there were before the permanent. As a result, the hair is weaker than before the permanent was applied and repeated applications over the same spot may eventually cause strand breakage.
Ammonium thioglycolate Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
Ammoniummercaptoacetat Anbieter Lieferant Produzent Hersteller Vertrieb Händler.
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5421-46-5, Ammonium thioglycolate Verwandte Suche:
  • thioglycolicacidammoniumsaltsolution
  • thioglycollicacid,ammoniumsalt
  • Organic Intermediates Ammonium thioglycolate
  • Ammonium Thioglycolate E:candyli(at)speedgainpharma(dot)com
  • mercapto-aceticacimonoammoniumsalt
  • thiofacoa-50
  • thioglycolicacidammoniumsaltsol.
  • THIOGLYCOLIC ACID AMMONIUM SALT SOL., ~6 0% IN WATER
  • AmmoniumMercaptoacetateSolution
  • ammonium marcaptoacetate
  • Ammoniumthioglykolat
  • THIOGLYCOLIC ACID AMMONIUM SALT 60% SOLUTION IN WATER
  • usafmo-2
  • THIOGLYCOLIC ACID AMMONIUM SALT
  • MERCAPTOACETIC ACID AMMONIUM SALT
  • ATG
  • AMMONIUM MERCAPTOACETATE
  • Hair waving agent
  • Ammonium thioglycollate solution
  • Perm salt
  • Ammonium thioglycolate, 70 WT.% solution in water
  • Thioglycollic acid ammonium
  • Ammonium Thioglycolate (ca. 60% in Water)
  • (ca. 60% in Water)
  • AMMoniuM Thioglycolate&nbsp
  • Thioglycolic Acid Ammonium Salt Ammonium Mercaptoacetate
  • AMMoniuM thioglycolate solution,~70% in H2O
  • AMMoniuM thioglycolate, 70% solution in H2O
  • -
  • 5421-46-5
  • Organic Building Blocks
  • Thiols/Mercaptans
  • Sulfur Compounds
  • Building Blocks
  • AMMONIUM THIOGLYCOLATE
  • AMMONIUM THIOGLYCOLLATE
  • Ammonium thioglycolate solution
  • Aceticacid,mercapto-,monoammoniumsalt
  • Acetic acid,2-Mercapto-, aMMoniuM salt (1:1)
  • AMMoniuM thioglycolate solution ~60% in H2O
  • Ammonium 2-mercaptoacetate
  • Organic Intermediates Ammonium thioglycolate ,Ammonium mercaptoacetate CAS NO.: 5421-46-5
  • HSCH2COONH4
  • NH4COOCH2SH
  • Industrial/Fine Chemicals