Material Safety Data Sheet (MSDS) Potassium Dichromate (K₂Cr₂O₇)

Resonance March 18, 2026

  B. Sc Chemistry III & IV Semester NEP 2020 w.e.f June 2025

SEC00022764P

CHE/SEC/P/276
Lab Safety and Laboratory Practices
(Practical Paper)

Material Safety Data Sheet (MSDS)

Potassium Dichromate (K₂Cr₂O₇)

1. Identification of the Substance

  • Chemical Name: Potassium Dichromate

  • Formula: K₂Cr₂O₇

  • Molecular Weight: 294.18 g/mol

  • Manufacturer/Supplier: Laboratory Chemical Supplier

  • Emergency Contact No.: As per supplier

2. Hazard Identification

  • Hazard Class: Toxic, oxidizing, carcinogenic, corrosive

  • Hazard Symbols: Toxic, Oxidizing, Environmental hazard

  • Signal Word: Danger

  • Hazard Statements:

    • Toxic if swallowed or inhaled

    • Causes severe skin burns and eye damage

    • Strong oxidizing agent (may intensify fire)

    • Carcinogenic (may cause cancer)

    • Harmful to aquatic life

3. Composition / Information on Ingredients

Component NamePercentage (%)CAS Number
Potassium Dichromate~100%7778-50-9

4. First Aid Measures

  • Inhalation: Move to fresh air; seek medical attention

  • Skin Contact: Wash immediately with plenty of water

  • Eye Contact: Rinse cautiously with water for 15 minutes

  • Ingestion: Do not induce vomiting; seek medical help immediately

5. Fire-Fighting Measures

  • Suitable Extinguishers: Water spray, foam

  • Special Hazards: Releases toxic chromium fumes on heating

  • Protective Equipment: Wear full protective gear

6. Accidental Release Measures

  • Personal Precautions: Avoid dust inhalation; wear PPE

  • Environmental Precautions: Prevent contamination of water bodies

  • Cleanup Method: Collect carefully and dispose as hazardous waste

7. Handling and Storage

  • Handling: Avoid contact and inhalation; use gloves

  • Storage: Store in a cool, dry place away from organic materials

8. Exposure Controls / Personal Protection

  • Exposure Limits: As per safety guidelines

  • PPE Required: Gloves, goggles, mask, lab coat

9. Physical and Chemical Properties

  • Appearance: Orange-red crystalline solid

  • Odor: Odorless

  • Melting Point: ~398°C

  • Solubility: Soluble in water

10. Stability and Reactivity

  • Stability: Stable under normal conditions

  • Conditions to Avoid: Heat, organic materials

  • Incompatible Materials: Reducing agents, combustible substances

11. Toxicological Information

  • Health Effects: Skin irritation, respiratory issues, cancer risk

  • LD₅₀: Toxic (varies)

12. Ecological Information

  • Highly toxic to aquatic organisms

13. Disposal Considerations

  • Dispose as hazardous chemical waste

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