NIOSH Pocket Guide to Chemical Hazards


CAS 22224-92-6


RTECS TB3675000
Synonyms & Trade Names
Ethyl 3-methyl-4-(methylthio)phenyl-(1-methylethyl)phosphoramidate; Nemacur®; Phenamiphos
DOT ID & Guide


NIOSH REL: TWA 0.1 mg/m3 [skin]
OSHA PEL†: none
IDLH N.D. See: IDLH INDEX Conversion
Physical Description
Off-white to tan, waxy solid. [insecticide] [Note: Found commercially as a granular ingredient (5-15%) or in an emulsifiable concentrate (400 g/l).]
MW: 303.4
BP: ?
MLT: 121°F
Sol: 0.03%
VP: 0.00005 mmHg
IP: ?

Sp.Gr: 1.14
Fl.P: ?
UEL: ?
LEL: ?

Incompatibilities & Reactivities
None reported [Note: May hydrolyze under alkaline conditions.]
Measurement Methods
NIOSH 5600
See: NMAM or OSHA Methods
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated/Daily
Remove: When wet or contaminated
Change: Daily
Provide: Quick drench
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, blood cholinesterase
See also: INTRODUCTION   See ICSC CARD: 0483