# NIOSH Pocket Guide to Chemical Hazards
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. | 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
Personal Protection & Sanitation 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 To be added later
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