# NIOSH Pocket Guide to Chemical Hazards
Tetramethyl succinonitrile | CAS 3333-52-6
(CH3)2C(CN)C(CN)(CH3)2 | RTECS WN4025000
Synonyms & Trade Names Tetramethyl succinodinitrile, TMSN | DOT ID & Guide
Exposure Limits | NIOSH REL: TWA 3 mg/m3 (0.5 ppm) [skin]
OSHA PEL: TWA 3 mg/m3 (0.5 ppm) [skin]
IDLH 5 ppm | Conversion 1 ppm = 5.57 mg/m3
Physical Description Colorless, odorless solid. [Note: Forms cyanide in the body.]
MW: 136.2 | BP: Sublimes | MLT: 338°F (Sublimes) | Sol: Insoluble
VP: ? | IP: ? |  | Sp.Gr: 1.07
Fl.P: ? | UEL: ? | LEL: ? |
Combustible Solid
Incompatibilities & Reactivities Strong oxidizers
Measurement Methods NIOSH S155 (II-3); OSHA 7
Personal Protection & Sanitation 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 a high-efficiency particulate filter/Any appropriate escape-type, self-contained breathing apparatus
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
See also: INTRODUCTION