# NIOSH Pocket Guide to Chemical Hazards
Phorate | CAS 298-02-2
(C2H5O)2P(S)SCH2SC2H5 | RTECS TD9450000
Synonyms & Trade Names O,O-Diethyl S-(ethylthio)methylphosphorodithioate; O,O-Diethyl S-ethylthiomethylthiothionophosphate; Thimet; Timet | DOT ID & Guide 3018 152 (organophosphorus pesticide, liquid)
Exposure Limits | NIOSH REL: TWA 0.05 mg/m3 ST 0.2 mg/m3 [skin]
OSHA PEL†: none
IDLH N.D. | Conversion
Physical Description Clear liquid with a skunk-like odor. [insecticide]
MW: 260.4 | BP: ? | FRZ: -45°F | Sol: 0.005%
VP: 0.0008 mmHg | IP: ? |  | Sp.Gr(77°F): 1.16
Fl.P(oc): 320°F | UEL: ? | LEL: ? |
Class IIIB Combustible Liquid, but does not readily ignite.
Incompatibilities & Reactivities Water, alkalis [Note: Hydrolyzed in the presence of moisture and by alkalis.]
Measurement Methods NIOSH 5600
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet or contaminated Change: No recommendation Provide: Eyewash, Quick drench | First Aid (See procedures) Eye: Irrigate immediately Skin: Soap flush 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, skin, respiratory system; miosis; rhinorrhea (discharge of thin mucus); headache; chest tightness, wheezing, laryngeal spasm, salivation, cyanosis; anorexia, nausea, vomiting, abdominal cramps, diarrhea; sweating; muscle fasciculation, lassitude (weakness, exhaustion), paralysis; dizziness, confusion, ataxia; convulsions, coma; low blood pressure; cardiac irregularities
Target Organs Eyes, skin, respiratory system, central nervous system, cardiovascular system, blood cholinesterase
See also: INTRODUCTION