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Sulfanilic acid

Sulfanilic acid Suppliers list
Company Name: Hefei TNJ Chemical Industry Co.,Ltd.
Tel: 86-0551-65418684 18949823763
Products Intro: Product Name:Sulfanilic Acid
Purity:99% Package:1kg;1USD
Company Name: Capot Chemical Co.,Ltd.
Tel: +86-571-85586718
Products Intro: Product Name:Sulfanilic acid
Purity:98%(Min,HPLC) Package:100g;1kg;5kg,10kg,25kg,50kg
Company Name: Henan DaKen Chemical CO.,LTD.
Tel: +86-371-66670886
Products Intro: Product Name:Sulfanilic acid
Purity:99% Package:100g,500g,1KG,10KG,100KG
Company Name: Henan Tianfu Chemical Co.,Ltd.
Tel: 0371-55170693
Products Intro: Product Name:121-57-3
Purity:0.99 Package:25KG,5KG;1KG;500G
Company Name: Shanghai Time Chemicals CO., Ltd.
Tel: +86-021-57951555
Products Intro: Product Name:Sulfanilic acid

Lastest Price from Sulfanilic acid manufacturers

  • Sulfanilic acid
  • US $10.00 / KG
  • 2021-10-20
  • CAS:121-57-3
  • Min. Order: 500g
  • Purity: 99%
  • Supply Ability: 2000MT/Month
  • Sulfanilic acid
  • US $10.00 / KG
  • 2021-08-31
  • CAS:121-57-3
  • Min. Order: 1KG
  • Purity: 99.99%
  • Supply Ability: 200 tons/month
Sulfanilic acid Basic information
Product Name:Sulfanilic acid
Synonyms:4-aminobenzenesulfonate;SULFANILIC ACID, ANHYDROUS, REAGENT (ACS)SULFANILIC ACID, ANHYDROUS, REAGENT (ACS)SULFANILIC ACID, ANHYDROUS, REAGENT (ACS)SULFANILIC ACID, ANHYDROUS, REAGENT (ACS);Diazobenzenesulfonic acid test solution(ChP);SULFANILIC ACID ANHYD PWD;Mesalazine EP Impurity O;Sulfanilic acid puriss. p.a., >=99.0% (T);Sulfanilic acid Vetec(TM) reagent grade, 99%;BES SODIUM SALT HIGH PURITY GRADE
Product Categories:Organics;INORGANIC & ORGANIC CHEMICALS;Intermediates of Dyes and Pigments;Amines;Aromatics;Sulfur & Selenium Compounds
Mol File:121-57-3.mol
Sulfanilic acid Structure
Sulfanilic acid Chemical Properties
Melting point >300 °C(lit.)
density 1.485
refractive index 1.5500 (estimate)
storage temp. Store below +30°C.
solubility 10g/l
form solid
pka3.24(at 25℃)
PH2.5 (10g/l, H2O, 20℃)
Water Solubility 0.1 g/100 mL (20 ºC)
Merck 14,8926
BRN 908765
Stability:Stable. Incompatible with strong oxidizing agents.
CAS DataBase Reference121-57-3(CAS DataBase Reference)
NIST Chemistry ReferenceBenzenesulfonic acid, 4-amino-(121-57-3)
EPA Substance Registry SystemSulfanilic acid (121-57-3)
Safety Information
Hazard Codes C,Xi
Risk Statements 36/38-43-34
Safety Statements 26-36/37/39-45-37-24-36/37
RIDADR UN 2790 8/PG 3
WGK Germany 1
RTECS WP3895500
Autoignition Temperature>400 °C
HS Code 29214210
Hazardous Substances Data121-57-3(Hazardous Substances Data)
ToxicityLD50 orally in Rabbit: 12300 mg/kg
MSDS Information
4-Anilinesulfonic acid English
SigmaAldrich English
ACROS English
ALFA English
Sulfanilic acid Usage And Synthesis
DescriptionSulfanilic acid (4-amino benzene sulfonic acid ) is an off-white crystalline solid which finds application in quantitative analysis of nitrate and nitrite ions. The solid acid exists as a zwitterion, and has an unusually high melting point.
Chemical Propertiesgreyish-white crystals or powder
UsesA toxic metabolite of Tartrazine (T007700). Used as Ehrlich’s reagent, for detecting of nitrites. Antibacterial.
DefinitionChEBI: An aminobenzenesulfonic acid that is aniline sulfonated at the para-position.
ApplicationAs the compound readily form diazo compounds, it is used to make dyes and sulpha drugs . This property is also used for the quantitative analysis of nitrate and nitrite ions by diazonium coupling reaction with N-(1-Naphthyl) ethylene diamine , resulting in an azo dye, and the concentration of nitrate or nitrite ions were deduced from the color intensity of the resulting red solution by colorimetry.
It is also used as a standard in combustion analysis.
General DescriptionWhite powder with faint purple tinge. Grayish-white flat crystals. Becomes anhydrous at around 212°F. Low toxicity (used medicinally).
Air & Water ReactionsInsoluble in water.
Reactivity ProfileSulfanilic acid is an amino acid. Reacts weakly with both acids and bases.
Fire HazardFlash point data for Sulfanilic acid are not available, however Sulfanilic acid is probably combustible.
Chemical SynthesisSulfanilic acid can be produced by sulfonation of aniline.
Purification MethodsCrystallise the acid (as dihydrate) from boiling water. Dry it at 105o for 2-3hours, then over 90% H2SO4 in a vacuum desiccator. The S-benzylisothiuronium salt has m 187o (from aqueous EtOH). [Beilstein 14 IV 2655.]
Tag:Sulfanilic acid(121-57-3) Related Product Information
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