NIOSH Pocket Guide to Chemical Hazards


CAS 55-38-9


RTECS TF9625000
Synonyms & Trade Names
Baytex; Entex; O,O-Dimethyl O-3-methyl-4-methylthiophenyl phosphorothioate
DOT ID & Guide


NIOSH REL: See Appendix D
OSHA PEL†: none
IDLH N.D. See: IDLH INDEX Conversion
Physical Description
Colorless to brown liquid with a slight, garlic-like odor. [insecticide]
MW: 278.3
BP: ?
FRZ: 43°F
Sol: 0.006%
VP: 0.0003 mmHg
IP: ?

Sp.Gr: 1.25
Fl.P: NA

Noncombustible Liquid
Incompatibilities & Reactivities
Measurement Methods
None available
See: NMAM or OSHA Methods
Personal Protection & Sanitation (See protection)
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 flush immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
Important additional information about respirator selection
Respirator Recommendations Not available.
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms Nausea, vomiting, abdominal cramps, diarrhea, salivation; headache, dizziness, lassitude (weakness, exhaustion); rhinorrhea (discharge of thin mucus), chest tightness; blurred vision, miosis; cardiac irregularities; muscle fasciculation; dyspnea (breathing difficulty)
Target Organs respiratory system, central nervous system, cardiovascular system, plasma cholinesterase
See also: INTRODUCTION   See ICSC CARD: 0655