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VWR Sulphanilic acid 98.0-102.0%, AnalaR NORMAPUR® analytical reagent
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Formula: 4-(H₂N)C₆H₄SO₃H
CAS Number: 121-57-3
Specifications:
| Application | Analytical Chemistry | ||
| Storage Temperature | Ambient | ||
| Product Type | Laboratory Chemical | Forms | Powder |
| Product Brand | VWR | ||
| Product Grade | Analytical grade | Formula | 4-(H₂N)C₆H₄SO₃H |
High-Purity Aromatic Amine-Sulfonic Acid for Analytical, Synthetic, and Dye Chemistry Applications
VWR Sulphanilic Acid (4-Aminobenzenesulfonic acid, C₆H₄(NH₂)(SO₃H)) is an aromatic amine-sulfonic acid compound available in both GPR RECTAPUR® (≥98%) and AnalaR NORMAPUR® (98.0–102.0%) analytical grades. It is widely used in azo dye synthesis, diazotization reactions, and analytical assays, especially for detecting nitrite ions via diazotization-coupling methods. This compound serves as a key intermediate in colorimetric analysis, pharmaceutical research, and organic synthesis workflows.
Product Specifications
| Property | Value |
|---|---|
| Product Name | Sulphanilic Acid |
| Chemical Formula | 4-(H₂N)C₆H₄SO₃H |
| Molecular Weight | 173.19 g/mol |
| CAS Number | 121-57-3 |
| MDL Number | MFCD00007886 |
| Merck Index | 13,09012 |
| EINECS Number | 204-482-5 |
| GHS Classification | GHS07 (Irritant) |
| Boiling Point | 363 °C (1013 hPa) |
| Melting Point | 279 °C |
| Density (25 °C) | 1.485 g/cm³ |
| Storage Temperature | Ambient |
| Physical Form | White to off-white crystalline powder |
Assay and Purity (AnalaR NORMAPUR®)
| Parameter | Specification |
|---|---|
| Assay (on dried basis) | 98.0–102.0% |
| Ignition residue (as SO₄) | ≤100 ppm |
| Water content | ≤0.7% |
| Insolubility in Na₂CO₃ solution | ≤0.02% |
| Chloride (Cl⁻) | ≤20 ppm |
| Nitrite (NO₂⁻) | ≤0.5 ppm |
| Sulphate (SO₄²⁻) | ≤100 ppm |
Packaging Options
| Catalog Number | Grade | Pack Type | Pack Size |
|---|---|---|---|
| 20673.294 | GPR RECTAPUR® | Plastic bottle (solid) | 1 kg |
| 20674.231 | AnalaR NORMAPUR® | Plastic bottle (solid) | 250 g |
Applications
- Diazotization reactions for azo dye and pigment synthesis
- Colorimetric detection of nitrites in analytical chemistry
- Intermediate in pharmaceutical and organic synthesis
- Reagent for chemical education and teaching labs
- Building block in aromatic sulfonic acid chemistry
VWR Sulphanilic Acid, available in both GPR RECTAPUR® and AnalaR NORMAPUR® grades, offers high purity and reproducibility for a wide range of analytical, synthetic, and educational applications. Its reliable performance in diazotization and colorimetric testing makes it a trusted reagent in research, QC, and chemical formulation labs.
- Pack Size: 250g 1kg