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o-Dianisidine																				Related Pages
Synonyms & Trade Names
			Dianisidine, 3,3'-Dianisidine, 3,3'-Dimethoxybenzidine
CAS No.
			119-90-4
	RTECS No.
			DD0875000
	DOT ID & Guide

Formula(NH2C6H3OCH3)2
	Conversion
	IDLH
			Ca [N.D.]See: IDLH INDEX

Exposure Limits
			NIOSH RELCa See Appendix A See Appendix C
					OSHA PEL See Appendix C
	Measurement Methods
			**NIOSH** 5013;**OSHA** 71
					
					See: NMAM or OSHA Methods
										
Physical Description
			Colorless crystals that turn a violet color on standing.
					[Note: Used as a basis for many dyes.]													
										
Molecular Weight244.3	
	Boiling Point?
	Melting Point279°F
	SolubilityInsoluble
	Vapor Pressure?
	Ionization Potential?											
Specific Gravity?	
	Flash Point403°F
	Upper Explosive Limit?
	Lower Explosive Limit?
Combustible Solid
Incompatibilities & Reactivities
			Oxidizers
Exposure Routes
			inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
			irritation skin; In Animals: kidney, liver damage; thyroid, spleen changes; [potential occupational carcinogen]
Target Organs
			Skin, kidneys, liver, thyroid, liver
Cancer Site[in animals: bladder, liver, stomach & mammary gland tumors]										
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
			**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: 1582

			
							

			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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D
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M
N
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P
Q
R
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T
U
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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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