NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

Monocrotophos

CAS
6923-22-4

C7H14NO5P

RTECS
TC4375000
Synonyms & Trade Names

3-Hydroxy-N-methylcrotonamide dimethylphosphate, Monocron
DOT ID & Guide
2783 / 152 (organophosphorus pesticide, solid)

Exposure
Limits

NIOSH REL: TWA 0.25 mg/m3
OSHA PEL: none
IDLH
N.D. See: IDLH INDEX
Conversion
Physical Description
Colorless to reddish-brown solid with a mild, ester odor. [insecticide]
MW: 223.2
BP: 257°F
MLT: 129°F
Sol: Miscible
VP: 0.000007 mmHg
IP: ?

Sp.Gr: ?
Fl.P: >200°F
UEL: ?
LEL: ?

Combustible Solid
Incompatibilities & Reactivities

Metals, low molecular weight alcohols & glycols [Note: Corrosive to black iron, drum steel, stainless steel 304 & brass. Should be stored at 70-80°F.]
Measurement Methods
NIOSH 5600; OSHA PV2045
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: Water 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
Irritation eyes, miosis, blurred vision; dizziness, convulsions; dyspnea (breathing difficulty); salivation, abdominal cramps, nausea, diarrhea, vomiting; in animals: possible teratogenic effects
Target Organs
Eyes, respiratory system, central nervous system, cardiovascular system, blood cholinesterase, reproductive system
See also: INTRODUCTION   See ICSC CARD: 0181