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1,1-Dimethylhydrazine																				Related Pages
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 RELCa 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.													
										
Molecular Weight60.1	
	Boiling Point147°F
	Freezing Point-72°F
	SolubilityMiscible
	Vapor Pressure103 mmHg
	Ionization Potential8.05 eV											
Specific Gravity0.79	
	Flash Point5°F
	Upper Explosive Limit95%
	Lower Explosive Limit2%
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 concernAny appropriate escape-type, self-contained breathing apparatus
				Important additional information about respirator selection
See also
			INTRODUCTION
					  ICSC CARD: 0147
					  MEDICAL TESTS: 0083

			
							

			Page last reviewed:  October 30, 2019						Content
							source: 	National Institute for Occupational Safety and Health NIOSH Pocket Guide to Chemical Hazards
Introduction
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Chemical Names, Synonyms and Trade Names
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CAS Numbers
RTECS Numbers
Appendices
A – NIOSH Potential Occupational Carcinogens
B – Thirteen OSHA-Regulated Carcinogens
C – Supplementary Exposure Limits
D – Substances with No Established RELs
E – OSHA Respirator Requirements for Selected Chemicals
F – Miscellaneous Notes
G – 1989 Air Contaminants Update Project: Exposure Limits NOT in Effect
Type C & CE – Definitions for Type C and Type CE Respirators
Personal Protection and Sanitation Codes
First Aid Procedures Follow NIOSH Facebook
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