Thioglykolsäure Produkt Beschreibung

Mercaptoacetic acid Struktur
68-11-1
  • CAS-Nr.68-11-1
  • Bezeichnung:Thioglykolsäure
  • Englisch Name:Mercaptoacetic acid
  • Synonyma:Mercaptoessigsure;Thioglykolsäure;Ethan-2-thiol-1-s?ure;2-Mercaptoethans?ure
    TGA;usafcb-35;MEQUINDOX;USAF cb-35;thioglycolic;thiovanicacid;Thioglycolate;Thiovanic acid;Thiovanie acid;mercaptoacetic
  • CBNumber:CB6477604
  • Summenformel:C2H4O2S
  • Molgewicht:92.12
  • MOL-Datei:68-11-1.mol
Thioglykolsäure physikalisch-chemischer Eigenschaften
  • Schmelzpunkt: :−16 °C(lit.)
  • Siedepunkt: :96 °C5 mm Hg(lit.)
  • Dichte :1.326 g/mL at 20 °C(lit.)
  • Dampfdichte :3.2 (vs air)
  • Dampfdruck :0.4 mm Hg ( 25 °C)
  • Brechungsindex :n20/D 1.505(lit.)
  • Flammpunkt: :126 °C
  • storage temp.  :2-8°C
  • Aggregatzustand :Liquid
  • pka :3.68(at 25℃)
  • Farbe :clear clear, colorless
  • PH :1 (H2O, 20℃)
  • Wasserlöslichkeit :soluble
  • Sensitive  :Air Sensitive
  • Merck  :14,9336
  • BRN  :506166
  • Expositionsgrenzwerte :TLV-TWA 1 ppm (~3.8 mg/m3) (ACGIH).
  • CAS Datenbank :68-11-1(CAS DataBase Reference)
  • NIST chemische Informationen :Acetic acid, mercapto-(68-11-1)
Sicherheit

Mercaptoacetic acid Chemische Eigenschaften,Einsatz,Produktion Methoden

  • ERSCHEINUNGSBILD VISKOSE FARBLOSE FLüSSIGKEIT MIT CHARAKTERISTISCHEM GERUCH.
  • CHEMISCHE GEFAHREN Zersetzung beim Verbrennen unter Bildung giftiger Rauche mit Schwefeloxiden und Schwefelwasserstoff. Mittelstarke Säure. Reagiert mit starken Oxidationsmitteln, Alkalien und organischen Verbindungen. Greift Stahl, Edelstahl und Aluminium an.
  • ARBEITSPLATZGRENZWERTE TLV: 1 ppm (als TWA); Hautresorption; (ACGIH 2005).
    MAK nicht festgelegt (DFG 2005).
  • AUFNAHMEWEGE Aufnahme in den Körper durch Inhalation, über die Haut und durch Verschlucken.
  • INHALATIONSGEFAHREN Beim Verdampfen bei 20°C kann sehr schnell eine gesundheitsschädliche Kontamination der Luft eintreten.
  • WIRKUNGEN BEI KURZZEITEXPOSITION WIRKUNGEN BEI KURZZEITEXPOSITION:
    Die Substanz verätzt die Augen die Haut und die Atemwege. Inhalation des Dampfes kann zu Lungenödem führen (s.Anm.). Exposition oberhalb der Arbeitsplatzgrenzwerte kann zum Tod führen. Die Auswirkungen treten u.U. verzögert ein. ärztliche Beobachtung notwendig. (s. Anm.)
  • LECKAGE Gefahrenbereich verlassen! Fachmann zu Rate ziehen! Belüftung. Ausgelaufene Flüssigkeit möglichst in abdichtbaren Behältern sammeln. Reste mit Sand oder inertem Absorptionsmittel aufnehmen und an einen sicheren Ort bringen. Chemikalienschutzanzug mit umgebungsluftunabhängigem Atemschutzgerät.
  • R-Sätze Betriebsanweisung: R23/24/25:Giftig beim Einatmen, Verschlucken und Berührung mit der Haut.
    R34:Verursacht Verätzungen.
    R26:Sehr giftig beim Einatmen.
    R24/25:Giftig bei Berührung mit der Haut und beim Verschlucken.
  • S-Sätze Betriebsanweisung: S25:Berührung mit den Augen vermeiden.
    S27:Beschmutzte, getränkte Kleidung sofort ausziehen.
    S28:Bei Berührung mit der Haut sofort abwaschen mit viel . . . (vom Hersteller anzugeben).
    S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
    S36/37:Bei der Arbeit geeignete Schutzhandschuhe und Schutzkleidung tragen.
    S23:Gas/Rauch/Dampf/Aerosol nicht einatmen(geeignete Bezeichnung(en) vom Hersteller anzugeben).
  • Beschreibung Thio glycolic acid (TGA) is the organic compound HSCH2CO2H . It contains both a thiol (mercaptan) and a carboxylic acid. It is a clear liquid with a strong unpleasant odor. It is readily oxidized by air to the corresponding disulfide [SCH2CO2H]2.
    TGA was developed in the 1940s for use as a chemical depilatory and is still used as such, especially in salt forms, including calcium thioglycolate and sodium thioglycolate. TGA is the precursor to ammonium thioglycolate that is used for permanents. TGA and its derivatives break the disulfide bonds in the cortex of hair. One reforms these broken bonds in giving hair a "perm." Alternatively and more commonly, the process leads to depilation as is done commonly in leather processing. It is also used as an acidity indicator, manufacturing of thioglycolates, and in bacteriology for preparation of thioglycolate media.
    TGA is also used in the making of tin stabilizers often used in certain polyvinyl chloride products (such as vinyl siding).
    TGA, usually as its dianion, forms complexes with metal ions. Such complexes have been used for the detection of iron, molybdenum, silver, and tin.
    Thioglycolic acid is used as nucleophile in thioglycolysis reactions used on condensed tannins to study their structure.
  • Chemische Eigenschaften Thioglycolic acid is a colorless liquid with a strong unpleasant odor like rotten eggs.
  • Chemische Eigenschaften Also known as mercaptoacetic acid, HSCH2COOH is a colorless liquid with a strong unpleasant odor. Used as a reagent for metals such as iron, molybdenum, silver, and tin,and in bacteriology.
  • Verwenden Thioglycolic Acid is an organic compound containing both a thiol and a carboxylic acid. Thioglycolic Acid is a precursor to ammonium thioglycolate, a chemical used for permanents. Thioglycolic Acid is used in organic synthesis as a nucleophile in thioglycolysis reactions and is used as a S transfer agent for sulfonyl chloride synthesis.
  • Verwenden Sensitive reagent for iron, molybdenum, silver, tin. With ferric iron a blue color appears, and when an alkali hydroxide is added to a solution contg ferrous salts and thioglycolic acid, a yellow precipitate forms. Used in the manufacture of thioglycolates. The ammonium and sodium salts are commonly used for cold waving and the calcium salt is a depilatory. The sodium salt also is used in bacteriology in the preparation of thioglycolate media.
  • Verwenden Mercaptoacetic acid is used as a reagent formetals analysis; in the manufacture of thioglycolates, pharmaceuticals, and permanentwave solutions; and as a vinyl stabilizer.
  • Allgemeine Beschreibung A colorless liquid with an unpleasant odor. Density 1.325 g / cm3. Used to make permanent wave solutions and depilatories. Corrosive to metals and tissue.
  • Air & Water Reaktionen Readily oxidized by air. Water soluble.
  • Reaktivität anzeigen Mercaptoacetic acid is readily oxidized by air . Reacts readily with other oxidizing agents as well in reactions that may generate toxic gases. Incompatible with diazo and azo compounds, halocarbons, isocyanates, aldehydes, alkali metals, nitrides, hydrides, and other strong reducing agents. Reactions with these materials may generate heat and toxic and flammable gases. May react with acids to liberate hydrogen sulfide. Neutralizes bases in exothermic reactions. Reacts with cyanides, sulfites, nitrites, thiosulfates to generate flammable and toxic gases and heat. Reacts with carbonates and bicarbonates.
  • Hazard Toxic by ingestion and inhalation, strong irritant to tissue, eyes, and skin.
  • Health Hazard TOXIC; inhalation, ingestion or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
  • Health Hazard Mercaptoacetic acid is a highly toxic and ablistering compound. Even a 10% solutionwas lethal to most experimental animals by dermal absorption. The oral LD50 value ofundiluted acid is less than 50 mg/kg (Patty1963). The lethal dose in rabbits by skinabsorption is 300 mg/kg. The acute toxicsymptoms in test animals include weakness,respiratory distress, convulsions, irritation ofthe gastrointestinal tract, and liver damage.
    Mercaptoacetic acid is a severe irritant.Contact with eyes can cause conjunctivalinflammation and corneal opacity. Skin contact can result in burns and necrosis.
  • Brandgefahr Combustible material: may burn but does not ignite readily. When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion hazards. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. Runoff may pollute waterways. Substance may be transported in a molten form.
  • Sicherheitsprofil Poison by ingestion, skin contact, intraperitoneal, and intravenous routes. Moderately toxic by subcutaneous route. A corrosive irritant to skin, eyes, and mucous membranes. When heated to decomposition it emits toxic fumes of SOx. See also MERCAPTANS and HYDROGEN SULFIDE.
  • mögliche Exposition Thioglycolic acid is used to make thioglycolates; in sensitivity tests for iron; in formulations of permanent wave solutions and depilatories; in pharmaceutical manufacture; as a stabilizer in vinyl plastics.
  • Versand/Shipping UN1940 Thyoglycolic acid, Hazard class: 8; Labels: 8-Corrosive material.
  • läuterung methode Mix the acid with an equal volume of *benzene; the *benzene is then distilled off to dehydrate the acid. After heating to 100o to remove most of the *benzene, the residue is distilled under vacuum and stored in sealed ampoules at 3o. [Eshelman et al. Anal Chem 22 844 1960, Beilstein 3 IV 1130.]
  • Inkompatibilitäten Compounds of the carboxyl group react with all bases, both inorganic and organic (i.e., amines) releasing substantial heat, water and a salt that may be harmful. Incompatible with arsenic compounds (releases hydrogen cyanide gas), diazo compounds, dithiocarbamates, isocyanates, mercaptans, nitrides, and sulfides (releasing heat, toxic and possibly flammable gases), thiosulfates and dithionites (releasing hydrogen sulfate and oxides of sulfur). Air, strong oxidizers; bases, active metals, for example, sodium potassium, magnesium, and calcium. Readily oxidized by air. Thermal decomposition causes release of hydrogen sulfide. May attack various metals.
  • Waste disposal Dissolve in flammable solvent and burn in furnace equipped with afterburner and alkaline scrubber.
Mercaptoacetic acid Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
Thioglykolsäure Anbieter Lieferant Produzent Hersteller Vertrieb Händler.
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68-11-1, Mercaptoacetic acid Verwandte Suche:
  • Mercapto acetic acid、2-Mercapto acetic acid、TGA
  • THIOGLYCOLIC ACID, REAGENTTHIOGLYCOLIC ACID, REAGENTTHIOGLYCOLIC ACID, REAGENTTHIOGLYCOLIC ACID, REAGENT
  • Thioglycolic acid 85% 95%
  • 2-mercaptoacetate
  • 2-Thioglycolic acid
  • 2-thio-glycolicaci
  • 2-thioglycolicacid
  • Aceticacid,mercapto-
  • Acide thioglycolique
  • acidethioglycolique
  • acidethioglycolique(french)
  • alpha-Mercaptoacetic acid
  • thioglycolic
  • thio-glycolicaci
  • Thiovanic acid
  • thiovanicacid
  • USAF cb-35
  • usafcb-35
  • MERCAPTOACETIC ACID
  • 2-MERCAPTOACETIC ACID
  • Thiovanie acid
  • THIOGLYCOLIC ACID
  • THIOGLYCOLLIC ACID
  • Thioglyeollic acid
  • TGA
  • TRIGLYCOLIC ACID
  • Thioglycolic acid solution,Mercaptoacetic acid
  • THIOGLYCOLIC ACID REAGENT, (Mercaptoacetic Acid)
  • Mercaptoacetic acid, 98% 250ML
  • THIOGLYCOLIC ACID GR FOR ANALYSIS
  • Thioglycolic acid (TGA)
  • Acetic acid,2-Mercapto-
  • Thioglycolic acid >=99%
  • Thioglycolic acid >=98%
  • Benzene Ramification
  • Mercaptoacetic acid TGA
  • alpha-mercaptoaceticacid
  • Glycolic acid, 2-thio-
  • Glycolic acid, thio-
  • glycolicacid,2-thio-
  • Kyselina merkaptooctova
  • Kyselina thioglykolova
  • kyselinamerkaptooctova
  • kyselinathioglykolova
  • Mercaptoacetate
  • mercaptoacetic
  • mercapto-aceticaci
  • Sulfanylacetic acid
  • thioglycolic acid free acid
  • Thioglycolic acid solution
  • Thioglypollic Acid
  • THIOGLYCOLIC ACID 80 % EXTRA PURE
  • THIOGLYCOLIC ACID 80%, A PRODUCT FROM EL F ATOCHEM (TGA 80%)
  • MERCAPTOESSIGSAEURE 99+%, EIN PRODUKT VO
  • THIOGLYCOLIC ACID SOLUTION, 80% IN WATER
  • MERCAPTOACETIC ACID, 99+% (TGA99) (WORLD
  • MERCAPTOACETIC ACID, SOLUTION EXTRA PURE 80+%
  • MERCAPTOACETIC ACID, GR 99+%