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Product FOB Price Min.Order Supply Ability Supplier
High Quality: Sulfanilic acid with Best Price
Cas No: 121-57-3
USD $ 1.0-1.0 / Kilogram 1 Kilogram 500 Metric Ton/Month Scale Chemical Corporation Contact Supplier
High Quality Sulfanilic Acid 99%
Cas No: 121-57-3
No Data 1 Kilogram 3000MT/Month Metric Ton/Month Yixing Zeyuan Chemical Technology Co Ltd Contact Supplier
Sulfanilic acid
Cas No: 121-57-3
No Data 5000 Kilogram 10000 Metric Ton/Year Hebei Lead Bio-Chemicals Co., Ltd. Contact Supplier
Sulfanilic acid Manufacturer/High quality/Best price/In stock
Cas No: 121-57-3
USD $ 3.0-3.0 / Kilogram 1 Kilogram 1-100 Metric Ton/Month Hangzhou Dayangchem Co., Ltd. Contact Supplier
High purity Sulfanilic acid with high quality cas:121-57-3
Cas No: 121-57-3
USD $ 2210.0-2530.0 / Metric Ton 1 Metric Ton 99999 Kilogram/Year Hangzhou Dingyan Chem Co., Ltd Contact Supplier
CAS:121-57-3 Sulfanilic acid
Cas No: 121-57-3
No Data 1 Kilogram 100 Metric Ton/Month Kono Chem Co.,Ltd Contact Supplier
Sulfanilic acid
Cas No: 121-57-3
No Data 1 Kilogram 20 Metric Ton/Month Henan Allgreen Chemical Co.,Ltd Contact Supplier
High quality P-Aminobenzenesulfonic Acid supplier in China
Cas No: 121-57-3
No Data No Data No Data Simagchem Corporation Contact Supplier
Cas No: 121-57-3
No Data 10 Milligram Amadis Chemical Co., Ltd. Contact Supplier
Sulfanilic acid
Cas No: 121-57-3
No Data No Data Metric Ton/Day Hefei TNJ chemical industry co.,ltd Contact Supplier

121-57-3 Usage

Fire Hazard

Flash point data for Sulfanilic acid are not available, however Sulfanilic acid is probably combustible.

General Description

White powder with faint purple tinge. Grayish-white flat crystals. Becomes anhydrous at around 212°F. Low toxicity (used medicinally).

Purification Methods

Crystallise 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.]

Reactivity Profile

Sulfanilic acid is an amino acid. Reacts weakly with both acids and bases.


A toxic metabolite of Tartrazine (T007700). Used as Ehrlich’s reagent, for detecting of nitrites. Antibacterial.

Air & Water Reactions

Insoluble in water.

Chemical Properties

greyish-white crystals or powder


ChEBI: An aminobenzenesulfonic acid that is aniline sulfonated at the para-position.

121-57-3 Well-known Company Product Price

Brand (Code)Product description CAS number Packaging Price Detail
Sigma-Aldrich (251917)  Sulfanilicacid  ACS reagent, 99% 121-57-3 251917-500G 3,100.50CNY Detail
Sigma-Aldrich (251917)  Sulfanilicacid  ACS reagent, 99% 121-57-3 251917-100G 869.31CNY Detail
Sigma-Aldrich (251917)  Sulfanilicacid  ACS reagent, 99% 121-57-3 251917-25G 304.20CNY Detail
Vetec (V900220)  Sulfanilicacid  Vetec reagent grade, 99% 121-57-3 V900220-100G 101.23CNY Detail
USP (1633506)  Sulfanilicacid  United States Pharmacopeia (USP) Reference Standard 121-57-3 1633506-200MG 14,578.20CNY Detail
Sigma-Aldrich (86090)  Sulfanilicacid  puriss. p.a., ≥99.0% (T) 121-57-3 86090-500G 2,666.43CNY Detail
Sigma-Aldrich (86090)  Sulfanilicacid  puriss. p.a., ≥99.0% (T) 121-57-3 86090-100G 869.31CNY Detail
Sigma-Aldrich (86090)  Sulfanilicacid  puriss. p.a., ≥99.0% (T) 121-57-3 86090-5G 522.99CNY Detail
Fluka (72326)  Sulfanilicacidsolution  volumetric, 0.1 M (0.1N) 121-57-3 72326-1L 436.41CNY Detail
Sigma-Aldrich (39441)  NitrateReagentB  for microbiology 121-57-3 39441-100ML-F 356.85CNY Detail
Sigma-Aldrich (PHR1419)  Sulfanilic Acid  pharmaceutical secondary standard; traceable to USP 121-57-3 PHR1419-500MG 718.73CNY Detail
Alfa Aesar (A15825)  Sulfanilic acid, 98+%    121-57-3 5000g 2433.0CNY Detail



According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 12, 2017

Revision Date: Aug 12, 2017


1.1 GHS Product identifier

Product name 4-aminobenzenesulfonic acid

1.2 Other means of identification

Product number -
Other names Sulfanilic Acid

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:121-57-3 SDS

121-57-3Upstream product

121-57-3Related news

Kinetic, mechanistic and spectral studies for the oxidation of Sulfanilic acid (cas 121-57-3) by alkaline hexacyanoferrate(III)09/25/2019

The kinetics of oxidation of sulfanilic acid (p-aminobenzenesulfonic acid) by hexacyanoferrate(III) in alkaline medium was studied spectrophotometrically. The reaction showed first order kinetics in hexacyanoferrate(III) and alkali concentrations and an order of less than unity in sulfanilic aci...detailed

A turn-on fluorescent probe for sensitive detection of sulfide anions and ascorbic acid by using Sulfanilic acid (cas 121-57-3) and glutathione functionalized graphene quantum dots09/24/2019

The rational surface functionalization of graphene quantum dots (GQDs) has attracted much attention to extend their application in fabricating bio/chemical sensing platform. In this paper, a GQDs-based copper ions (Cu2+) modulated dual-functional fluorescent probe was developed. The attachment o...detailed

Sulfanilic acid (cas 121-57-3) catalyzed solvent-free synthesis of 1,5-benzodiazepine derivatives09/10/2019

Sulfanilic acid has been found to be an efficient catalyst for the synthesis of 1,5-benzodiazepines from o-phenylenediamine and ketones. This method is simple, effective and environmentally friendly and gives better yields.detailed

Enzymatic growth of single-layer MnO2 nanosheets in situ: Application to detect alkaline phosphatase and ascorbic acid in the presence of Sulfanilic acid (cas 121-57-3) functionalized graphene quantum dots09/08/2019

In this work, a rapid fluorescence “turn off-on” assay was developed to detect alkaline phosphatase (ALP) and ascorbic acid (AA) based on sulfanilic acid functionalized graphene quantum dots (SGQDs) and MnO2 nanosheets, which was fabricated through in situ formation of MnO2 nanosheets in the p...detailed

Electrochemical incineration of Sulfanilic acid (cas 121-57-3) at a boron-doped diamond anode09/06/2019

The anodic oxidation of sulfanilic acid solutions has been studied in acidic medium using a divided cell with a boron-doped diamond (BDD) anode and a stainless steel cathode. Overall mineralization was achieved under all experimental conditions tested due to the efficient destruction of sulfanil...detailed

Kinetic of the degradation of Sulfanilic acid (cas 121-57-3) azochromotrop (SPADNS) by Fenton process coupled with ultrasonic irradiation or L-cysteine acceleration09/05/2019

The degradation kinetics of sulfanilic acid azochromotrop (SPADNS) in aqueous phase by Fenton process has been examined. The effect of pH, hydrogen peroxide [H2O2], ferrous ion [Fe2+], molar ratio of [H2O2]/[Fe2+] and SPADNS concentration [SPADNS] have been estimated systematically. The optimu...detailed

Sulfanilic acid (cas 121-57-3) increases intracellular free-calcium concentration, induces reactive oxygen species production and impairs trypsin secretion in pancreatic AR42J cells09/04/2019

We studied the effects of the tartrazine-metabolite sulfanilic acid on the physiology of pancreatic AR42J cells. Sulfanilic acid (1 μM-1 mM) induced a slow and progressive increase in intracellular free-calcium concentration that reached a plateau. The effect of sulfanilic acid was not concentr...detailed

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