Thermo Scientific™ Chromosulphuric acid

Chromosulphuric acid is a strongly corrosive oxidizing agent, typically composed of concentrated sulfuric acid (≥92%) and dissolved chromium(VI) compounds (e.g., potassium dichromate). It is widely used in laboratories for heavy-duty glassware cleaning, removing organic residues that resist conventional detergents.

This acid blend exhibits powerful oxidizing properties, making it extremely effective but also toxic and environmentally hazardous, requiring strict handling protocols.

Key Features

• CAS Number: 65272-71-1
• Chemical Formula: Cr₂K₂O₇·H₂O₄S
• Molecular Weight: 392.25 g/mol
• Grade: Laboratory reagent
• Concentration: ≥92% sulfuric acid
• Appearance: Red-brown to dark brown liquid
• Packaging: Available in 1 L and 2.5 L amber glass bottles
• Hazard Class: ADR 8, Packing Group I
• UN Number: 2240

Typical Specifications

Applications

• Glassware Cleaning: Highly effective for oxidizing and removing persistent organic residues.
• Analytical Preparation: Used in protocols requiring clean, contaminant-free surfaces.
• Specialty Chemical Processes: May be employed in oxidation steps for specific industrial or synthetic procedures.

Note: Due to its environmental and health hazards, Chromosulphuric acid is increasingly being replaced by safer alternatives like non-chromium glass cleaners or acid-peroxide mixtures.

Safety & Handling

• Hazard Statements:
  • H290: May be corrosive to metals
  • H314: Causes severe skin burns and eye damage
  • H350: May cause cancer
• Precautions:
  • Handle in a chemical fume hood
  • Use appropriate PPE (acid-resistant gloves, face shield, lab coat)
  • Avoid contact with organic materials and reducing agents
• First Aid:
  • In case of contact, rinse with plenty of water and seek medical attention immediately

Ordering Information

Thermo Fisher’s Chromosulphuric Acid offers a highly potent oxidizing solution for laboratory cleaning and select analytical applications. Due to its carcinogenic and corrosive nature, it should only be used when no safer alternative is viable. Appropriate handling and disposal are essential to protect personnel and the environment.