Sulfanilic Acid CAS 121-57-3

Product Description:

Product Name: Sulfanilic acid CAS NO: 121-57-3            

Synonyms:

4-Sulfoaniline;

Benzenesulfonic acid, 4-amino-;

p-Anilinesulfonic Acid;

Chemical & Physical Properties:

Appearance: Light grey powder

Assay :≥99.0%

Density: 1.485

Boiling Point: 500℃

Melting Point: 288℃(dec)

Water Solubility: 0.1 g/100 mL (20℃)

Stability: Stable. Incompatible with strong oxidizing agents.

Storage Condition: Store in dark

Safety Information:

RTECS: WP3895500

Safety Statements: S24-S37

HS Code: 2921420090

WGK Germany: 1

RIDADR: UN 2790 8/PG 3

Risk Statements: R36/38; R43

Hazard Codes: Xi,C

Hazard Declaration: H315; H317; H319

Caution Statements: P280; P305 + P351 + P338

Signal Word: Warning

Symbol: GHS07

Sulfanilic acid (4-aminobenzenesulfonic 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. As 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.

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