NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

Fenthion

CAS
55-38-9

C10H15O3PS

RTECS
TF9625000
Synonyms & Trade Names

Baytex; Entex; O,O-Dimethyl O-3-methyl-4-methylthiophenyl phosphorothioate
DOT ID & Guide

Exposure
Limits

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
UEL: NA
LEL: NA

Noncombustible Liquid
Incompatibilities & Reactivities

Oxidizers
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
Respirator Recommendations
Not available.
Important additional information about respirator selection
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