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Sulfanilic Acid CAS 121-57-3
Sulfanilic Acid is an aromatic amine sulfonic acid. It appears as a white to off-white crystalline powder that is stable under normal conditions. This compound combines the characteristics of both an amine and a sulfonic acid, making it a valuable intermediate in dye, pharmaceutical, and chemical manufacturing industries.
Sulfanilic Acid CAS 121-57-3
- CAS: 121-57-3
- Molecular Formula: C6H7NO3S
- Molecular Weight: 173.19
- EINECS: 204-482-5
- HS Code: 29214210
- Synonyms: Sulfanilic acid puriss. p.a., >=99.0% (T); Sulfanilic acid Vetec(TM) reagent grade, 99%; BES SODIUM SALT HIGH PURITY GRADE; p-Anilinesulfonic acid anhydrous; DNA MW MARKER 1KB LADDER; 4-SULFOANILINE;4-ANILINESULFONIC ACID; SUFANILIC ACID
What is Sulfanilic Acid CAS 121-57-3？
Sulfanilic Acid CAS 121-57-3 is an important industrial chemical derived from aniline through sulfonation. It is widely used as a key intermediate in the synthesis of azo dyes, optical brighteners, and various organic compounds. Because of its high purity, good stability, and strong reactivity, it has become indispensable in colorant production and analytical chemistry. Additionally, Sulfanilic Acid forms stable diazonium salts, which are crucial for coupling reactions in dye manufacturing. It also finds applications in the pharmaceutical field and as a standard reagent in laboratories for nitrate detection.
Specifications
| Property | Value |
|---|---|
| Melting Point | >300 °C(lit.) |
| Boiling Point | 288 ℃ |
| Density | 1.485 |
| Color | White to Off-White |
| Form | Solid |
| Solubility | 10g/l |
| InChIKey | HVBSAKJJOYLTQU-UHFFFAOYSA-N |
| PH | 2.5 (10g/l, H2O, 20℃) |
| Storage Temperature | Store below +30°C |
| Stability | Stable. Incompatible with strong oxidizing agents. |
Features
- High Chemical Purity: Ensures consistent performance across industrial and laboratory applications.
- Excellent Reactivity: Suitable for diazotization and coupling reactions.
- Thermally Stable: Maintains stability under standard storage and processing conditions.
- Versatile Intermediate: Compatible with a wide range of organic synthesis pathways.
- Eco-Compatible Production: Manufactured through controlled processes with minimal environmental impact.
Applications
- Dye and Pigment Industry: Used in the production of azo dyes, acid dyes, and direct dyes.
- Optical Brighteners: Serves as a raw material in the synthesis of optical brightening agents for textiles and paper.
- Pharmaceuticals: Acts as an intermediate in the preparation of sulfa drugs and other medicinal compounds.
- Analytical Chemistry: Employed in the quantitative determination of nitrates and nitrites.
- Electroplating and Polymers: Utilized in certain surface treatment formulations and polymer modification processes.
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