1,1-Dimethylhydrazine |
Synonyms & Trade Names Dimazine, DMH, UDMH, Unsymmetrical dimethylhydrazine |
CAS No. 57-14-7 |
RTECS No. MV2450000 |
DOT ID & Guide 1163 131 |
Formula(CH3)2NNH2 |
Conversion 1 ppm = 2.46 mg/m3 |
IDLH Ca [15 ppm]
See: 57147 |
Exposure Limits NIOSH REL: Ca C 0.06 ppm (0.15 mg/m3) [2-hr] See Appendix A
OSHA PEL: TWA 0.5 ppm (1 mg/m3) [skin] |
Measurement Methods
NIOSH 3515
See: NMAM or OSHA Methods |
Physical Description Colorless liquid with an ammonia- or fish-like odor. |
MW: 60.1 |
BP: 147°F |
FRZ: -72°F |
Sol: Miscible |
VP: 103 mmHg |
IP: 8.05 eV |
Sp.Gr: 0.79 |
Fl.P: 5°F |
UEL: 95% |
LEL: 2% |
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| Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F. |
Incompatibilities & Reactivities Oxidizers, halogens, metallic mercury, fuming nitric acid, hydrogen peroxide [Note: May ignite SPONTANEOUSLY in contact with oxidizers.] |
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact |
Symptoms irritation eyes, skin; choking, chest pain, dyspnea (breathing difficulty); drowsiness; nausea; anoxia; convulsions; liver injury; [potential occupational carcinogen] |
Target Organs central nervous system, liver, gastrointestinal tract, blood, respiratory system, eyes, skin |
Cancer Site[in animals: tumors of the lungs, liver, blood vessels & intestines] |
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:
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted canister providing protection against the compound of concern
Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection |
| See also: INTRODUCTION See ICSC CARD: 0147 See MEDICAL TESTS: 0083 |
