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Tetramethyl succinonitrile																				Related Pages
Synonyms & Trade Names
			Tetramethyl succinodinitrile, TMSN
CAS No.
			3333-52-6
	RTECS No.
			WN4025000
	DOT ID & Guide

Formula(CH3)2C(CN)C(CN)(CH3)2
	Conversion
			1 ppm = 5.57 mg/m3
	IDLH
			5 ppmSee: 3333526

Exposure Limits
			NIOSH RELTWA 3 mg/m3 (0.5 ppm) [skin]
					OSHA PEL TWA 3 mg/m3 (0.5 ppm) [skin]
	Measurement Methods
			**NIOSH** S155 (II-3);**OSHA** 7
					
					See: NMAM or OSHA Methods
										
Physical Description
			Colorless, odorless solid.
					[Note: Forms cyanide in the body.]													
										
Molecular Weight136.2	
	Boiling PointSublimes
	Melting Point338°F (Sublimes)
	SolubilityInsoluble
	Vapor Pressure?
	Ionization Potential?											
Specific Gravity1.07	
	Flash Point?
	Upper Explosive Limit?
	Lower Explosive Limit?
Combustible Solid
Incompatibilities & Reactivities
			Strong oxidizers
Exposure Routes
			inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
			headache, nausea; convulsions, coma; liver, kidney, gastrointestinal effects
Target Organs
			central nervous system, liver, kidneys, gastrointestinal tract
										
Personal Protection/Sanitation
			(See protection codes) **Skin:**Prevent skin contact
							**Eyes:**Prevent eye contact
							**Wash skin:**When contaminated
							**Remove:**When wet or contaminated
							**Change:**Daily
	First Aid
			(See procedures)**Eye:**Irrigate immediately
							**Skin:**Soap wash promptly
							**Breathing:**Respiratory support
							**Swallow:**Medical attention immediately
Respirator Recommendations
			**NIOSH/OSHA****Up to 28 mg/m3**: (APF = 10) Any supplied-air respirator(APF = 50) Any self-contained breathing apparatus with a full facepiece**Emergency or planned entry into unknown concentrations or IDLH conditions:** (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: 1121

			
							

			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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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
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