Product Identification:

Product name : Anhydrous Hydrazine(AH), Hydrazine Anhydrous

CAS NO. 302-01-2

UN NO. 2029 

Molecular formula: H4N2

Molecular weight: 32.05

Hazard Class: 8/3.3/6.1

Melting point: 1.4℃                  Boiling point: 113.5℃

Saturated vapour pressure: 1.92/25℃ Kpa

Relative density(water = 1): 1.01    Relative density(air = 1): 1.11

Solubility: Dissolved in water, alcohol, liquid ammonia and organic

solvents

Critical temperature: 380℃            Critical pressure: 14.69Mpa

Heat of combustion: 621.1kj/mol

Chemical Properties:

Combustibility: flammable         Fire insurance grade: second

Flash point(Open Cup): 52℃                 Spontaneous combustion temperature: 270℃

Explosive limit(v%): 2.9 min. --- 98.0max.

Dangerous characters: the product has strong restorative ability. 

Contacted with flame:

Heat can cause burning and explosion. Contacted with oxidizers such as

Chromium acid anhydride, KClO3, KMnO4 etc. can cause strong chemical

reaction and burning or explosion. Its vapour is hazardous. If be ignited, the product can burn without oxygen. If be heated, it decomposed into toxic nitro oxide gas.

Combustion (decomposition) product: nitro oxide (NO)

Stability: Unstable                Polymerization: none

Avoid: strong oxidizer, oxygen, copper etc.

Storage condition: avoid heat and direct sunshine

Fire extinguishing methods: using atomized water, carbon dioxide, foam, dry powder and sand etc. as fire extinguishing agent.

Toxicity: middling

        LD50: 60mg/kg (adult rat swallow); 91mg/kg (rabbit skin contact)

        LC50: 570ppm 4 hours (adult rat inhalation)

Disperse the population in polluted area to safe place, cut off fire sources. Advise the treating people wear pressure self respirator and anti-chemicals clothing. Don’t contact the leaked product directly. Spray water can lower vaporization, but can not lower the flammability. Absorb with sand or other inflammable materials, transported to suitable place for treating. It can wash away by large quantity water, diluted water released to effluent water system.  

MONOMETHYL HYDRAZINE

Product Identification:

Product name : Monomethyl Hydrazine(MMH), Methylhydrazine

CAS NO. 60-34-4

UN NO. 1244    

Molecular formula: CH6N2

Molecular weight: 46.06

Hazard Class: 6.1/3/8

Freezing point: -52.5℃                  Boiling point: 87.8℃

Saturated vapour pressure: 6.61/25℃ Kpa

Relative density(water = 1): 0.87    Relative density(air = 1): 1.6

Solubility: Dissolved in water, alcohol, liquid ammonia and organic

solvents

Critical temperature: 235℃     

Combustibility: flammable       Fire insurance grade: second

Flash point: -8℃               Spontaneous combustion temperature: 194℃

Explosive limit(v%): 2.5 min. --- 98.0max.

Dangerous characters: the product has strong restorative ability. 

Contacted with flame:

Heat can cause burning and explosion. Contacted with oxidizers such as

Chromium acid anhydride, KClO3, KMnO4 etc. can cause strong chemical

reaction and burning or explosion. Its vapour is hazardous. If be ignited, the product can burn without oxygen.

Combustion (decomposition) product: nitro oxide (NO)

Stability: Unstable                Polymerization: none

Avoid: strong oxidizer, oxygen, copper etc.

Storage condition: Space in container of its vapor phase must fill with nitrogen in storage.

Fire extinguishing methods: using atomized water, carbon dioxide, foam, dry powder and sand etc. as fire extinguishing agent.

Disperse the population in polluted area to safe place, cut off fire sources. Advise the treating people wear pressure self respirator and anti-chemicals clothing. Don’t contact the leaked product directly. Spray water can lower vaporization, but can not lower the flammability. Absorb with sand or other inflammable materials, transported to suitable place for treating. It can wash away by large quantity water, diluted water released to effluent water system.  

UNS-DIMETHYL HYDRAZINE

Product Identification:

Product name : 1,1-Dimethylhydrazine; Unsymmetrical(UDMH)

CAS NO. 57-14-7

UN NO. 1163   

Molecular formula: C2H8N2

Molecular weight: 60.10

Hazard Class: 6.1

Freezing point: -57.2℃                  Boiling point: 63.3℃

Saturated vapour pressure: 20.9/25℃ Kpa

Relative density(water = 1): 0.78    Relative density(air = 1): 1.94

Solubility: Dissolved in water, alcohol, hydrazine, petrol etc.

Critical temperature: 247.8℃   

A mildly alkaline and a very strong reducing agent

Combustibility: flammable       Fire insurance grade:

Flash point: -15℃             

Explosive limit(v%): 2.0 min. --- 95.0max.

Emergency:

Disperse the population in polluted area to safe place, cut off fire sources. Advise the treating people wear pressure self respirator and anti-chemicals clothing. Don’t contact the leaked product directly. Spray water can lower vaporization, but can not lower the flammability. Absorb with sand or other inflammable materials, transported to suitable place for treating. It can wash away by large quantity water, diluted water released to effluent water system.

Dinitrogen Tetroxide

Product Identification:

Product name : Dinitrogen Tetroxide(N2O4)
CAS NO. 10544-72-6
UN NO. 1067
Molecular formula: N2O4
Molecular weight: 92
Hazard Class: 2.3

Physical Properties:

Melting point: -11.2℃ Boiling point: 20.9℃
Saturated vapour pressure: 20.9/25℃ Kpa
Relative density(water = 1): 1.4   Relative density(air = 1): 2.8
Vapour Pressure 20℃ : 720 mm Hg
Critical temperature: 158℃
Appearance/Colour: Brownish gas
Odour: Pungent 

Chemical Properties:

Flammability range: Oxidiser

Emergency:

Personal precautions
Evacuate area. Ensure adequate air ventilation. Eliminate ignition sources.
Use self-contained breathing apparatus and chemically protective clothing.

Environmental precautions
Try to stop release. Reduce vapour with fog or fine water spray. Prevent from entering sewers, basements and workpits, or any place where its accumulation can be dangerous.

Clean up methods
Ventilate area.Wash contaminated equipment or sites of leaks with copious quantities of water. Hose down area with water.