NIOSH logo and tagline

Methomyl

Related Pages
Synonyms & Trade Names
Lannate®, Methyl N-((methylamino)carbonyl)oxy)ethanimidothioate, S-Methyl-N-(methylcarbamoyloxy)thioacetimidate
CAS No.
16752-77-5
RTECS No.
AK2975000
DOT ID & Guide
2757 151(carbamate pesticide, solid, toxic)
Formula
CH₃C(SCH₃)NOC(O)NHCH₃
Conversion
IDLH
N.D.
See: IDLH INDEX
Exposure Limits
NIOSH REL
TWA 2.5 mg/m3
OSHA PEL
none See Appendix G
Measurement Methods
NIOSH 5601
See: NMAM or OSHA Methods
Physical Description
White, crystalline solid with a slight, sulfur-like odor. [insecticide]
Molecular Weight
162.2
Boiling Point
?
Melting Point
172°F
Solubility
(77°F): 6%
Vapor Pressure
(77°F): 0.00005 mmHg
Ionization Potential
?
Specific Gravity
(75°F): 1.29
Flash Point
NA
Upper Explosive Limit
NA
Lower Explosive Limit
NA
Noncombustible Solid, but may be dissolved in flammable liquids.
Incompatibilities & Reactivities
Strong bases
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
irritation eyes; blurred vision, miosis; salivation; abdominal cramps, nausea, vomiting; dyspnea (breathing difficulty); lassitude (weakness, exhaustion), muscle twitching; liver, kidney damage
Target Organs
Eyes, respiratory system, central nervous system, cardiovascular system, liver, kidneys, blood cholinesterase
Personal Protection/Sanitation
(See protection codes)
Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:When contaminated
Remove:When wet or contaminated
Change:Daily
Provide:Quick drench
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

See also
INTRODUCTION   ICSC CARD: 0177
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health