# NIOSH Pocket Guide to Chemical Hazards
Temephos | CAS 3383-96-8
S[C6H4OP(S)(OCH3)2]2 | RTECS TF6890000
Synonyms & Trade Names Abate®; Temefos; O,O,O'O'-Tetramethyl O,O'-thiodi-p-phenylene phosphorothioate | DOT ID & Guide
Exposure Limits | NIOSH REL: TWA 10 mg/m3 (total) TWA 5 mg/m3 (resp)
OSHA PEL†: TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp)
IDLH N.D. | Conversion
Physical Description White, crystalline solid or liquid (above 87°F). [insecticide] [Note: Technical grade is a viscous, brown liquid.]
MW: 466.5 | BP: 248-257°F (Decomposes) | MLT: 87°F | Sol: Insoluble
VP(77°F): 0.00000007 mmHg | IP: ? |  | Sp.Gr: 1.32
Fl.P: ? | UEL: ? | LEL: ? |
Combustible Solid
Incompatibilities & Reactivities None reported
Measurement Methods NIOSH 0500, 0600; OSHA PV2056
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 immediately Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations To be added later
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms Irritation eyes, blurred vision; dizziness; dyspnea (breathing difficulty); salivation; abdominal cramps, nausea, diarrhea, vomiting
Target Organs Eyes, respiratory system, central nervous system, cardiovascular system, blood cholinesterase
See also: INTRODUCTION