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Tetramethyl succinonitrile

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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 ppm
See: 3333526
Exposure Limits
NIOSH REL
TWA 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 Weight
136.2
Boiling Point
Sublimes
Melting Point
338°F (Sublimes)
Solubility
Insoluble
Vapor Pressure
?
Ionization Potential
?
Specific Gravity
1.07
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