Hydrazine, aqueous solution, with not more than 37% Hydrazine

Formula
H2NNH2
Structure
Description
Colorless oily liquid. Penetrating odor resembling ammonia.
Uses
Reactant in fuel cells in military uses, reducing agent in electrodless nickel plating, chain extender in urethane polymerizations, reducing agent in plutonium extraction from reactor waste, water treatment agent-eg, for the removal of halogens.

Registry Numbers and Inventories.
CAS
302-01-2
EC (EINECS/ELINCS)
206-114-9
EC Index Number
007-008-00-3
EC Class
Flammable; Carcinogenic Category 2; Toxic; Corrosive; Sensitising; Dangerous for the Environment
RTECS
MU7175000
RTECS class
Tumorigen; Mutagen; Reproductive Effector
UN (DOT)
3293
Merck
12,4809
Beilstein/Gmelin
190 (G)
RCRA
U133
Swiss Giftliste 1
G-1690
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
H4N2
Formula mass
32.05
Melting point, °C
1
Boiling point, °C
113.5
Vapor pressure, mmHg
14 (25 C)
Vapor density (air=1)
1.1
Odor Threshold Odor threshold 3-4 ppm
Critical temperature
380
Critical pressure
14
Density
1.011 g/cm3 (20 C)
Solubility in water
Miscible
Viscosity
1.044 cp (15 C)
Surface tension
66.7 g/s2 at 25 C
Refractive index
1.46979 (20 C)
pKa/pKb
6.04 (pKb)
Heat of vaporization
45.27 kJ/mol
Heat of combustion
-615 kJ/mol

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Do not store in direct sunlight. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Storage under a nitrogen blanket has been recommended.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Ground and bond containers when transferring material. Use spark-proof tools and explosion proof equipment. Do not get in eyes, on skin, or on clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid contact with heat, sparks and flame. Do not ingest or inhale. Store protected from light. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Use water spray to disperse the gas/vapor. Remove all sources of ignition. Absorb spill using an absorbent, non-combustible material such as earth, sand, or vermiculite. Do not get water inside containers. A vapor suppressing foam may be used to reduce vapors. Water spray may reduce vapor but may not prevent ignition in closed spaces.
Stability
Thermally unstable.
Incompatibilities
Substance is highly reactive reducing agent. Incompatible with oxidizing agents (including air), acids, and some metal oxides and metals. Substance may spontaneously ignite in air when in contact with porous materials. Ignites on contact with dinitrogen oxide and tetroxide, hydrogen peroxide, tetryl, and nitric acid. Explodes on contact with dicyanofurazan, n-halomides, potassium, silver compounds, sodium hydroxide, titanium compounds, and trioxygen difluoride. Explosive compounds may result from contact with air, chloromethylnitrobenzene, lithium perchlorate, metal salts, methanol + nitromethane, sodium , and sodium perchlorate. Also incompatible with barium oxide or calcium oxide, benzeneseleninic acid or anhydride, calcium, carbon dioxide + stainless steel, 1-chloro-2,4-dinitrobenzene, cotton waste + heavy metals, (difluoroamino)difluoroacetonitrile, iodine pentoxide, rust, ruthenium(III) oxide, thiocarbonyl azide thiocyanate,
Decomposition
Oxides of nitrogen, ammonia and/or derivatives.

Fire.
Flash Point,°C
52
Autoignition, °C
270
Upper exp. limit, %
100
Lower exp. limit, %
4.7
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Use water spray to keep fire-exposed containers cool. Autoignition temperature varies based upon contact surface. Containers may explode when heated. Extinguishing media: For large fires, use water spray, fog, or alcohol-resistant foam. Use water spray to cool fire-exposed containers. Do NOT get water inside containers. For small fires, use dry chemical, carbon dioxide, or water spray. Cool containers with flooding quantities of water until well after fire is out.
Fire potential
Very flammable. Combustion probable.
Hazards
It is a flammable/combustible material and may be ignited by heat, sparks, or flames. Vapor may travel to a source of ignition and flash back. Container may explode in heat of fire. Vapor explosion and poison hazard indoors, outdoors, or in sewers. Runoff to sewer may create fire or explosion hazard. Vapors form explosive mixtures with air. May continue to burn in the absence of air. Decomposition gives off toxic nitrogen compound fumes. Can catch fire when in contact with porous materials such as wood, asbestos, cloth, earth, and rusty metals. Incompatible with oxidizers, hydrogen peroxide, nitric acid, metal oxides, and strong acids.
Combustion products
Fire will produce irritating, corrosive and/or toxic gases.
Health
4
 
Flammability
4
 
 
Reactivity
3
 

Health.
Exposure limit(s)
OSHA PEL: TWA 1 ppm (1.3 mg/m3) skin NIOSH REL: Ca C 0.03 ppm (0.04 mg/m3) 2-hour See Appendix A NIOSH IDLH: Potential occupational carcinogen 50 ppm
Carcinogin
G-A3, I-2B, N-2, CP65
Poison_Class
1*
Exposure effects
Repeated inhalation may cause chronic bronchitis. May cause cancer according to animal studies. Repeated exposure may cause sensitization dermatitis. May cause reproductive and fetal effects.
   Ingestion
Harmful if swallowed. Causes gastrointestinal irritation with nausea, vomiting and diarrhea. May cause liver and kidney damage. Causes digestive tract burns with immediate pain, swelling of the throat, convulsions, and possible coma. Exposure may cause anemia and other blood abnormalities.
   Inhalation
Harmful if inhaled. Irritation may lead to chemical pneumonitis and pulmonary edema. May cause liver and kidney damage. Causes severe irritation of upper respiratory tract with coughing, burns, breathing difficulty, and possible coma. Vapors may cause dizziness, nausea, itching, burning, and swelling of the eyes.
   Skin
May be fatal if absorbed through the skin. Prolonged and/or repeated contact may cause irritation and/or dermatitis. May cause skin sensitization, an allergic reaction, which becomes evident upon re-exposure to this material. Contact with liquid is corrosive and causes severe burns and ulceration. Contact with the skin may dissolve hair.
   Eyes
May cause irreversible eye injury. Exposure to the vapors or liquid may cause temporary blindness. Causes severe eye irritation and burns.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Discard contaminated clothing in a manner which limits further exposure.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed.

Transport.
UN number
3293
Response guide
Hazard class
3.1
USCG CHRIS Code
HDZ
 
Std. Transport #
4940322