Sulfanilic Acid CAS 121-57-3

Sulfanilic Acid CAS 121-57-3
Details:
Product Name: Sulfanilic acid
CAS No.: 121-57-3
Molecular Formula: C6H7NO3S
Molecular Weight: 173.19
Melting Point: >300 °C (lit.)
Boiling Point: 288 °C
Bulk Density: 620 kg/m³
Density: 1.485
Vapor Pressure: 0 Pa at 25 °C
Refractive Index: 1.5500 (estimate)
Storage Conditions: Store below +30 °C.
Solubility: 10 g/L
Acidity Coefficient (pKa): 3.24 (at 25 °C)
pH: 2.5 (10 g/L, H₂O, 20 °C)
Water Solubility: 0.1 g/100 mL (20 °C)
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Description
Technical Parameters

 

Products Description

 

Sulfanilic acid, white or grayish-white crystals. The hydrate loses water at 100°C, while the anhydrous form begins to decompose and carbonize at 280°C. Relative density 1.485 (25/4). Slightly soluble in cold water, insoluble in ethanol, ether, and benzene; significantly acidic; soluble in caustic soda and sodium carbonate solutions.

 

QQ20260316-133748

 

Application

 

Sulfanilic acid is mainly used in the manufacture of dyes, printing and dyeing auxiliaries, and in the prevention and control of wheat rust. It is also used as an intermediate in the production of fragrances, food colorings, pharmaceuticals, whitening agents, and pesticides. It can be used as a reference reagent, experimental reagent, and chromatographic analysis reagent in organic synthesis and chemical analysis processes.

 

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Quality Standard

Items

Standard

Appearance

White to light grey powder

Assay

99%min

Water insoluble

0.1% max

Aniline

0.05% max

Water

0.5% max

Storage and transportation

 

Storage Environment: Store in a cool, well-ventilated warehouse, away from fire and heat sources.

Separate Storage: Store separately from oxidizers, acids, and alkalis. Do not mix with other substances.

Spill Handling: The storage area should be equipped with suitable materials to contain spills.

Safety Precautions: Wear appropriate protective equipment during handling, such as dust masks and chemical safety goggles.

 

product-480-328
product-480-328

Marketing

 

Our products are sold well in more than 60 countries and regions including North America, Western Europe, Southeast Asia, Central and South America, etc. We have established long-term and stable cooperative relations with pharmaceutical companies in Europe, the United States, Greece, Germany, Iran, Russia, South Korea, India and other countries.

product-1600-900

 

product-1600-900

 

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