NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

Hydrazine

CAS
302-01-2

H2NNH2

RTECS
MU7175000
Synonyms & Trade Names

Diamine, Hydrazine (anhydrous), Hydrazine base
DOT ID & Guide
2029 / 132 (anhydrous)
3293 / 152 (< or =37% solution)
2030 / 153 (37-64% solution)
2029 / 132 (>64% solution)

Exposure
Limits

NIOSH REL: Ca C 0.03 ppm (0.04 mg/m3) [2-hour] See Appendix A
OSHA PEL: TWA 1 ppm (1.3 mg/m3) [skin]
IDLH
Ca [50 ppm] See: 302012
Conversion
1 ppm = 1.31 mg/m3
Physical Description
Colorless, fuming, oily liquid with an ammonia-like odor. [Note: A solid below 36°F.]
MW: 32.1
BP: 236°F
FRZ: 36°F
Sol: Miscible
VP: 10 mmHg
IP: 8.93 eV

Sp.Gr: 1.01
Fl.P: 99°F
UEL: 98%
LEL: 2.9%

Class IC Flammable Liquid: Fl.P. at or above 73F and below 100F.
Incompatibilities & Reactivities

Oxidizers, hydrogen peroxide, nitric acid, metallic oxides, acids [Note: Can ignite SPONTANEOUSLY on contact with oxidizers or porous materials such as earth, wood & cloth.]
Measurement Methods
NIOSH 3503; OSHA 20, 108
See: NMAM or OSHA Methods
Personal Protection & Sanitation
(See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet (flammable)
Change: No recommendation
Provide: Eyewash, Quick drench
First Aid
(See procedures)
Eye: Irrigate immediately
Skin: Water flush immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations
NIOSH
At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus
Escape: Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
Irritation eyes, skin, nose, throat; temporary blindness; dizziness, nausea; dermatitis; eye, skin burns; in animals: bronchitis, pulmonary edema; liver, kidney damage; convulsions; [potential occupational carcinogen]
Target Organs
Eyes, skin, respiratory system, central nervous system, liver, kidneys

Cancer Site
[in animals: tumors of the lungs, liver, blood vessels & intestine]
See also: INTRODUCTION   See ICSC CARD: 0281   See MEDICAL TESTS: 0115