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Thermo Scientific™ Sodium diphenylamine-4-sulphonate 98%
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Specifications:
| Application | Colorimetric Assay | ||
| Storage Temperature | Ambient | ||
| Product Type | Indicators | Forms | Powder |
| Product Brand | Thermo Fisher Scientific™, thermo Scientific | ||
| Product Grade | Analytical grade | Formula | C₁₂H₁₀NNaO₃S |
Sodium Diphenylamine-4-sulfonate is a water-soluble organic sulfonate salt frequently used as a redox indicator and intermediate in analytical chemistry. It is valued for its distinctive UV-Vis absorbance at λ_max ≈ 292–293 nm, and its ability to form charge-transfer complexes with oxidizing agents.
Key Features
- High Purity: ≥98% by HPLC; suitable for analytical and research workflows
- Redox Indicator: Commonly used in redox titrations (e.g., permanganate or cerium assays)
- UV-Vis Active: Strong absorbance at 292–293 nm in aqueous media
- Stable Solid Form: Supplied as a white to pale brown or grey powder
- Solubility: Water-soluble and compatible with aqueous-phase reactions
Chemical Identity & Properties
| Property | Value |
|---|---|
| CAS Number | 6152-67-6 |
| IUPAC Name | 4-(phenylamino)benzene-1-sulfonic acid sodium |
| Molecular Formula | C₁₂H₁₁NNaO₃S |
| Molecular Weight | 272.27 g/mol |
| Synonyms | Sodium 4-(phenylamino)benzenesulfonate |
| SMILES | [Na].OS(=O)(=O)C1=CC=C(NC2=CC=CC=C2)C=C1 |
| InChI Key | VMVSDVIYIMNZBS-UHFFFAOYSA-N |
| Appearance | White to pale brown or pale grey powder |
| UV-Vis λ_max | 292–293 nm (in water) |
| Form | Powder |
| Purity (Assay, HPLC) | >97.5% |
| Intended Use | Research Use Only (RUO) |
Applications
- Redox Indicator in titrations (e.g., Fe²⁺/Fe³⁺, MnO₄⁻, Ce⁴⁺ systems)
- UV-Visible Spectroscopy studies and detection methods
- Organic and coordination chemistry research
- Analytical chemistry teaching laboratories
- Colorimetric assay development
Compliance and Handling
- Brand Lineage: Previously Alfa Aesar, now Thermo Scientific™ Chemicals
- Grade: Research Use Only (RUO)
- Handling: Store in a dry place at room temperature; avoid exposure to light and moisture
- Documentation: Certificate of Analysis, SDS, and Specification Sheet available upon request
Thermo Scientific™ Sodium Diphenylamine-4-sulfonate is a high-purity analytical reagent widely used in redox titration and UV-Vis spectrophotometric applications. Its strong optical absorbance and redox sensitivity make it ideal for precise analytical determinations and colorimetric endpoint detection in chemical laboratories.
- Pack Size: 5g 25g