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| 1,1-Dimethylhydrazine | CAS 57-14-7 | ||
| (CH3)2NNH2 | RTECS MV2450000 | ||
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Synonyms & Trade Names Dimazine, DMH, UDMH, Unsymmetrical dimethylhydrazine |
DOT ID & Guide 1163 131 |
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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] | |||
| IDLH Ca [15 ppm] | Conversion 1 ppm = 2.46 mg/m3 | ||
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Physical Description Colorless liquid with an ammonia- or fish-like odor. |
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MW: 60.1 |
BP: 147°F |
FRZ: -72°F |
Sol: Miscible |
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VP: 103 mmHg |
IP: 8.05 eV |
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Sp.Gr: 0.79 |
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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. | |||
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Incompatibilities & Reactivities Oxidizers, halogens, metallic mercury, fuming nitric acid, hydrogen peroxide [Note: May ignite SPONTANEOUSLY in contact with oxidizers.] |
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Measurement Methods NIOSH 3515 |
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Personal Protection & Sanitation 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 |
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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 |
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| 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] | |
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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] |
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| See also: INTRODUCTION |