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4,4'-Methylenedianiline																				Related Pages
Synonyms & Trade Names
			4,4'-Diaminodiphenylmethane, para, para'-Diaminodiphenyl-methane, Dianilinomethane, 4,4'-Diphenylmethanediamine, MDA
CAS No.
			101-77-9
	RTECS No.
			BY5425000
	DOT ID & Guide

FormulaCH2(C6H4NH2)2
	Conversion
	IDLH
			Ca [N.D.]See: IDLH INDEX

Exposure Limits
			NIOSH RELCa See Appendix A
					OSHA PEL [1910.1050] TWA 0.010 ppm ST 0.100 ppm
	Measurement Methods
			**NIOSH** 5029
					
					See: NMAM or OSHA Methods
										
Physical Description
			Pale-brown, crystalline solid with a faint, amine-like odor.													
										
Molecular Weight198.3	
	Boiling Point748°F
	Melting Point198°F
	Solubility0.1%
	Vapor Pressure(77°F): 0.0000002 mmHg
	Ionization Potential10.70 eV											
Specific Gravity1.06 (Liquid at 212°F)	
	Flash Point374°F
	Upper Explosive Limit?
	Lower Explosive Limit?
Combustible Solid
Incompatibilities & Reactivities
			Strong oxidizers
Exposure Routes
			inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
			irritation eyes; jaundice, hepatitis; myocardial damage; In Animals: heart, liver, spleen damage; [potential occupational carcinogen]
Target Organs
			Eyes, liver, cardiovascular system, spleen
Cancer Site[in animals: bladder cancer]										
Personal Protection/Sanitation
			(See protection codes) **Skin:**Prevent skin contact
							**Eyes:**Prevent eye contact
							**Wash skin:**When contaminated/Daily
							**Remove:**When wet or contaminated
							**Change:**Daily
							**Provide:**Eyewash, Quick drench
	First Aid
			(See procedures)**Eye:**Irrigate immediately
							**Skin:**Soap wash immediately
							**Breathing:**Respiratory support
							**Swallow:**Medical attention immediately
Respirator Recommendations
			(See Appendix E)**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 organic vapor canister having an N100, R100, or P100 filter. Click here for information on selection of N, R, or P filters.Any appropriate escape-type, self-contained breathing apparatus
				Important additional information about respirator selection
See also
			INTRODUCTION
					  ICSC CARD: 1111
					  MEDICAL TESTS: 0250

			
							

			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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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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