Here's a detailed expansion of UN 2725 Nickel Nitrate with tables, covering chemical properties, hazards, regulations, and more:
UN 2725: Nickel Nitrate (Ni(NO₃)₂)
CAS Number: 13478-00-7 (anhydrous); 13478-01-8 (hexahydrate)
Synonyms: Nickel(II) Nitrate, Nickelous Nitrate
1. Chemical & Physical Properties
Property Details
Molecular Formula - Anhydrous: Ni(NO₃)₂
- Hexahydrate: Ni(NO₃)₂·6H₂O
Molar Mass - Anhydrous: 182.70 g/mol
- Hexahydrate: 290.79 g/mol
Appearance - Anhydrous: Greenish-yellow crystalline powder
- Hexahydrate: Bright green crystals, deliquescent
Solubility Highly soluble in water (55 g/100 mL at 20°C); soluble in ethanol, ammonia
Melting Point - Hexahydrate: ~56°C (loses water)
- Anhydrous: Decomposes above 100°C
Boiling Point Decomposes before boiling; hexahydrate releases NO₂ at ~137°C
Density - Hexahydrate: 2.05 g/cm³ (relative to water: 1.0)
pH (aqueous solution) Acidic (pH < 7 due to nitrate hydrolysis)
2. Hazard Classification
UN/DOT Class Hazard Category Risk Phrases (GHS)
Class 5.1 Oxidizing Substance - H272: May cause fire or explosion; strong oxidizer
- H301: Toxic if swallowed
- H314: Causes severe skin burns and eye damage
- H330: Fatal if inhaled
Environmental Risk Aquatic toxicity (H410: Very toxic to aquatic life with long-lasting effects)
3. Applications
Industry/Use Details
Electroplating Major use in nickel plating baths for corrosion resistance and surface finishing
Catalyst Production Synthesis of nickel-based catalysts for chemical reactions (e.g., hydrogenation)
Ceramics & Glass Additive for colored glazes and glass pigments (green/blue hues)
Agriculture Formerly used in fertilizers (now restricted due to toxicity)
Laboratory Reagents Analytical reagent for nickel ion detection and synthesis of nickel compounds
4. Safety & Handling
Precautions Measures
Personal Protection - Wear chemical-resistant gloves (e.g., nitrile).
- Use full-face shields or goggles.
- Wear respiratory protection (N95 or higher for dust/mist).
Storage - Store in airtight containers in a cool, dry place.
- Segregate from: Flammables (e.g., alcohols), reducing agents (e.g., metals, sulfides), organic materials.
Spill Response - Contain spills with non-combustible absorbents.
- Neutralize with lime or sodium bicarbonate (avoid excess heat).
- Dispose of waste as hazardous material.
Emergency Contact - In case of fire: Use water spray, dry chemical, or CO₂ extinguishers (avoid generating toxic NOx fumes).
- Inhalation/ingestion: Seek medical attention immediately; do not induce vomiting.
5. Regulatory Information
Regulation/Region Classification/Standards
OSHA (USA) PEL (Permissible Exposure Limit): 1 mg/m³ (as Ni) over 8-hour TWA
EU CLP Regulations Classified as:
- Oxidizing solid (Category 3)
- Toxic (Category 2, H301)
- Skin/eye corrosion (Category 1A, H314)
UN Transport Packing Group: II (Moderate hazard)
Label: OXIDIZER and TOXIC
REACH (EU) Listed for restriction due to carcinogenicity (Nickel compounds)
6. Environmental Impact
Toxicity: Highly toxic to aquatic organisms (e.g., fish, algae) even at low concentrations (LC50 for fish: ~1 mg/L).
Bioaccumulation: Nickel can bioaccumulate in food chains, posing risks to wildlife and humans.
Disposal: Must be treated as hazardous waste; avoid direct discharge into waterways or soil.
Key Notes:
Nickel nitrate is a strong oxidizer and reacts violently with combustible materials (e.g., sawdust, oil).
Chronic exposure may cause lung damage, skin sensitization, and systemic nickel poisoning.
Hot Tags: un 2725 nickel nitrate, China un 2725 nickel nitrate manufacturers, suppliers, factory