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Chemical Name: Anhydrous Hydrazine
Synonyms: Diamide, Hydrazine Monohydrate, Hydrazine Anhydrous
CAS Number: 302-01-2
Recommended Use: Rocket propellant, chemical intermediate, water treatment chemical, blowing agent
Supplier Information: Name, address, emergency phone number, and fax should come from the provider
Classification: Flammable liquid (Category 3), Acute toxicity oral (Category 2), Acute toxicity dermal (Category 1), Acute toxicity inhalation (Category 2), Skin corrosion (Category 1B), Serious eye damage (Category 1), Carcinogenicity (Category 2), Aquatic chronic (Category 3)
Label Elements: Signal word: Danger; Skull and crossbones pictogram, corrosive pictogram, health hazard pictogram, exclamation mark pictogram
Hazard Statements: Fatal if swallowed, fatal in contact with skin, toxic if inhaled; Causes severe burns to skin and eyes; Suspected of causing cancer; Causes damage to organs by repeated exposure; Flammable liquid and vapor; Harmful to aquatic life with long-lasting effects
Precautionary Statements: Do not breathe dust, fumes, gas, mist, vapors, or spray; Wear full protective gear; Keep away from heat, hot surfaces, sparks, open flames, and other ignition sources; No smoking
Other Hazards: Reacts violently with oxidizers, acids, and some metals; Produces toxic fumes when decomposed
Substance: Anhydrous Hydrazine
Hydrazine Concentration: Greater than 64% by weight
Other Constituents: Water (<36%), trace impurities from manufacturing process
Impurities Contributing to Hazard: Metal ions, chloride or nitrate residues can increase instability and hazard potential
Inhalation: Move the affected person to fresh air. Remove contaminated clothing. Bring medical attention quickly. Give oxygen if breathing is difficult, artificial respiration if breathing has stopped.
Skin Contact: Remove contaminated clothing. Rinse skin immediately with plenty of water for at least 15 minutes. Seek medical treatment.
Eye Contact: Flush eyes with water for at least 15 minutes while holding eyelids apart. Get immediate medical help even if no symptoms appear.
Ingestion: Do not induce vomiting. Rinse mouth, do not give anything by mouth if person is unconscious. Call poison control and physician at once.
Most Important Symptoms: Severe irritation, blisters, chemical burns, coughing, shortness of breath, dizziness, headache, risk of delayed lung injury and organ damage.
Advice for Medical Responders: Maintain open airway, monitor for delayed pulmonary edema, treat symptomatically.
Suitable Extinguishing Media: Use water spray, alcohol-resistant foam, dry chemical powder, or carbon dioxide. Do not use water jet.
Specific Hazards: Releases toxic fumes of nitrogen oxides and ammonia; can explode under intense heat or when contaminated.
Protective Equipment: Positive pressure self-contained breathing apparatus, full protective suit, avoid skin or eye contact with runoff.
Firefighting Instructions: Move containers from fire area if possible, cool containers with flooding water, keep people away from downwind vapor cloud.
Personal Precautions: Evacuate area, ventilate space, keep unprotected persons away, eliminate all ignition sources.
Protective Equipment: Wear chemical splash suit, gloves, boots, face shield, and self-contained breathing apparatus.
Cleanup Method: Absorb with inert material (dry sand or earth), do not use sawdust. Collect in a sealed metal container for disposal.
Environmental Precautions: Prevent entry into sewers or waterways. Notify authorities for large spills.
Safe Handling: Handle in a chemical fume hood or well-ventilated area. Avoid breathing vapor or mist, avoid skin and eye contact. Use spark-proof tools and explosion-proof equipment.
Safe Storage: Store in tightly closed metal containers, away from heat, sparks, flammable materials, oxidizers, and acids. Cool, dry, well-ventilated, and secure location. Protect from light.
Storage Incompatibilities: Oxidizers, acids, metals such as copper, brass, lead, and certain plastics. Do not reuse containers.
Occupational Exposure Limits: OSHA PEL: 1 ppm (1.3 mg/m3), ACGIH TLV: 0.01 ppm (0.013 mg/m3)
Engineering Controls: Local exhaust ventilation, explosion-proof ventilation systems, eye wash and safety shower stations in area
Personal Protective Equipment: Chemical resistant gloves (butyl rubber, Viton), splash goggles and face shield, full body suit, respiratory protection (PAPR or SCBA)
Hygiene Measures: Wash hands and face before breaks, after handling, and immediately if skin contact occurs; remove contaminated clothing
Appearance: Clear, colorless, oily liquid
Odor: Ammonia-like, pungent
Odor Threshold: 0.1–1 ppm
pH: Strongly basic (11-12 as solution)
Melting Point: 2°C (36°F)
Boiling Point: 113°C (235°F)
Flash Point: 38°C (100°F) (closed cup)
Autoignition Temperature: 270°C (518°F)
Explosive Limits: 2.7–100 vol % in air
Vapor Pressure: 14 mm Hg @ 25°C
Vapor Density: 1.1 (air = 1)
Density: 1.00–1.03 g/cm3
Solubility: Miscible with water, soluble in alcohol and ether
Partition coefficient (log Pow): -2.6
Decomposition Temperature: Decomposes explosively above 130°C
Evaporation Rate: Not available
Chemical Stability: Stable under recommended storage conditions, but highly reactive
Reactive Hazards: May ignite spontaneously on contact with porous materials; violent reaction with oxidizing agents, acids, certain metals
Decomposition Products: Nitrogen, ammonia, nitrogen oxides, hydrogen
Polymerization: May occur in the presence of contaminants or catalysts
Conditions to Avoid: Heat, flames, ignition sources, contamination with incompatible materials
Routes of Exposure: Inhalation, skin absorption, ingestion, eye and skin contact
Acute Toxicity: Oral (LD50, rat): 60 mg/kg; Dermal (LD50, rat): 42 mg/kg; Inhalation (LC50, rat, 4h): 0.83 mg/L
Chronic Toxicity: Liver and kidney damage, hemolytic anemia, allergic dermatitis, possible reproductive effects
Cancer Risk: IARC Group 2B (possibly carcinogenic to humans), NTP reasonably anticipated human carcinogen
Symptoms: Burning sensation, coughing, shortness of breath, headache, nausea, vomiting, dizziness, convulsions, coma
Other Effects: Risk of delayed pulmonary edema and organ injury
Ecotoxicity: Highly toxic to aquatic life (LC50 fish 0.6 mg/L, 96h); Harmful to plants and animals
Bioaccumulation: Low bioaccumulation potential (BCF < 1)
Persistence and Degradability: Rapidly degraded in the environment through volatilization and biodegradation
Mobility in Soil: High mobility in soil; can reach groundwater
Other Adverse Effects: Raising pH in water bodies, harm to aquatic flora and fauna even at low concentrations
Disposal Methods: Treat as hazardous waste under RCRA regulations; incineration by licensed waste disposal contractor in chemical incinerator with afterburner and scrubber
Sewage Disposal: Strictly prohibited
Contaminated Packaging: Triple-rinse, puncture or crush, dispose as hazardous waste
Precautions: Do not empty containers to drains; do not dispose without full neutralization and regulatory approval
UN Number: UN2029
Proper Shipping Name: Hydrazine, anhydrous
Hazard Class: 8 (Corrosive), 3 (Flammable liquid), 6.1 (Toxic substance)
Packing Group: I (Great Danger)
Transport Labels: Corrosive, Flammable Liquid, Toxic
Environmental Hazards: Marine pollutant
Special Precautions: Secure tightly, avoid heating, keep away from incompatible substances; Emergency Response Guide 132
US Regulations: TSCA listed, CERCLA (RQ: 1 lb), SARA 302/313, Listed carcinogen (NTP, OSHA, IARC)
EU Regulations: REACH registered, classified as Carcinogen Cat. 2, Flammable, Toxic, Corrosive
International Transport: IMDG, IATA restrictions apply, classified as marine pollutant and forbidden on passenger aircraft
Other Local Requirements: National, state, regional, and municipal regulatory obligations for storage, transport, and disposal; keep records of inventory and hazardous waste movements
