Phenolydisulfonic Acid 25% in H₂SO₄ CHEM-425481033

Chemical Name: Solution of Phenolydisulfonic Acid 25% in Sulfuric Acid

Molecular Formula of Active Ingredient: _C6H6O7S2

CAS Number: 96-77-5

EC Number: 202-533-6

Technical Specifications

• Form: liquid
• Color: yellowish to brown
• Odor: characteristic, phenolic
• pH Value: strongly acidic
• Melting Point: no data available
• Boiling Point: not specified
• Auto-ignition Temperature: not applicable
• Flash Point: not applicable
• Explosion Limits: not applicable
• Vapor Pressure: no data available
• Density: approx. 1.8 g/cm³
• Bulk Density: not applicable
• Solubilityin Water: very good, miscible
• Solubility in Organic Solvents: no data available

Analytical Properties

• Content of Phenolydisulfonic Acid: 25% (in H₂SO₄ solution)
• Sensitivity to Nitrate Ions: according to the analytical formulation

Warning Statements and Classification

• RID/ADR Transport Class: 8, Packaging Group II
• UN Number: 2584
• H-Statements: H314 - Causes severe skin burns and eye damage
• P-Statements:
  • P280 - Wear protective gloves/protective clothing/eye protection/face protection
  • P305+P351+P338 - IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing

Recommended Storage Conditions

Store in a tightly closed container, in a dry and cool place, away from heat sources and incompatible substances. Avoid contact with metals, alkalis, and large amounts of water.

Remarks

Primarily used in chemical analysis, especially in the determination of nitrates by colorimetric methods.