Hydrazine

Synonyms & Trade Names

Diamine, Hydrazine (anhydrous), Hydrazine base

CAS No.

302-01-2

RTECS No.

MU7175000

DOT ID & Guide

2029 132(anhydrous)
3293 152(≤ 37% solution)
2030 153(37-64% solution)
2029 132(>64% solution)

Formula

H₂NNH₂

Conversion

1 ppm = 1.31 mg/m³

IDLH

Ca [50 ppm]
See: 302012

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] See Appendix G

Measurement Methods

NIOSH 3503;
OSHA 20 , 108
See: NMAM or OSHA Methods

Physical Description

Colorless, fuming, oily liquid with an ammonia-like odor. [Note: A solid below 36°F.]

Molecular Weight

32.1

Boiling Point

236°F

Freezing Point

36°F

Solubility

Miscible

Vapor Pressure

10 mmHg

Ionization Potential

8.93 eV

Specific Gravity

1.01

Flash Point

99°F

Upper Explosive Limit

98%

Lower Explosive Limit

2.9%

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

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.]

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]

Personal Protection/Sanitation

(See protection codes)
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

Hydrazine

NIOSH REL

OSHA PEL

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