Methiocarb

  • Carbamic acid, methyl-3,5-dimethyl-4-(methylthio)phenyl ester
  • Carbamic acid, N-methyl-4-(methylthio)-3,5-xylyl ester
  • 3,5-Dimethyl-4-methylmercaptophenyl-N-methyl-carbamate
  • 4-Methylmercapto-3,5-dimethylphenyl N-methylcarbamate
  • Phenol, 3,5-dimethyl-4-(methylthio)-methylcarbamate
  • 3,5-Xylenol, 4-(methylthio)-methylcarbamate
Formula
C11H15NO2S
Structure
Description
White crystalline powder with a mild odor.
Uses
Acaricide, molluscicide.

Registry Numbers and Inventories.
CAS
2032-65-7
EC (EINECS/ELINCS)
217-991-2
EC Index Number
006-023-00-2
EC Class
Toxic; Dangerous for the Environment
RTECS
FC5775000
RTECS class
Agricultural Chemical and Pesticide
UN (DOT)
2757
Merck
12,6050
Beilstein/Gmelin
1881431
RCRA
P199
EPA OPP
100501
Swiss Giftliste 1
G-2250
Austrailia AICS
Listed
New Zealand
Listed

Properties.
Formula
C11H15NO2S
Formula mass
225.31
Melting point, °C
117.2
Boiling point, °C
334
Vapor pressure, mmHg
0.0001 (25 C)
Vapor density (air=1)
N/R
Critical temperature
539
Critical pressure
26.7
Density
1.236 g/cm3 (20 C)
Solubility in water
30 mg/L (20 C)
Partition coefficient, pKow
2.92

Hazards and Protection.
Storage
Tightly closed containers. Keep away from heat and water.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Personal protective equipment include safety goggles or face mask, hooded suit, approved respirator or self-contained breathing apparatus, rubber gloves and boots.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Avoid inhalation of material. This compound is a solid carbamate insecticide. Do not touch spilled material; stop leak if you can do so without risk. Use water spray to reduce vapors. Small spills: absorb with sand or other noncombustible absorbent material and place into containers for later disposal. Small dry spills: With clean shovel, place material into clean, dry container and cover; move containers from spill area. Large spills: Dike far ahead of spill for later disposal. Keep unnecessary people away; isolate hazard area and deny entry. Stay upwind; keep out of low areas. Ventilate closed spaces before entering them. Remove and isolate contaminated clothing at the site. In case of contact with material, immediately flush skin or eyes with running water for at least 15 minutes.
Stability
Unstable in highly alkaline media.
Incompatibilities
Incompatible with strong acids and bases, and especially

Fire.
Fire fighting
This compound is a solid carbamate insecticide.Keep unnecessary people away; isolate hazard area and deny entry. Stay upwind; keep out of low areas. Ventilate closed spaces before entering them. Wear positive pressure breathing apparatus and special protective clothing. Remove and isolate contaminated clothing at the site. Move container from fire area if you can do it without risk. Fight fire from maximum distance. Dike fire control water for later disposal; do not scatter the material.This compound is a carbamate insecticide.Extinguish with dry chemical, carbon dioxide, water spray, fog, or foam.
Fire potential
Nonflammable.
Hazards
When heated to decomposition, it emits very toxic fumes of nitrogen and sulfur oxides.
Combustion products
Toxic fumes of sulfur and nitrogen oxides are emitted.

Health.
Poison_Class
3
Exposure effects
Blurred vision, miosis, tremor, muscle twitching, convulsions, mental confusion, and coma may occur. Delayed peripheral neuropathy similar to that seen with organophosphates has been described in one case. Dystonic reaction may occur following parenteral injection. Methiocarb was not teratogenic in rats or rabbits, but was rapidly transferred across the placenta in rats. <br>No data were available to assess the potential effects of exposure to this agent during pregnancy or lactation.
   Ingestion
Nausea, vomiting, diarrhea, and abdominal cramping may be noted.
   Inhalation
Dyspnea, rales, and pulmonary edema may occur.
   Skin
Avoid any skin contact. See Inhalation.
   Eyes
See Inhalation.

First aid
 
   Ingestion
Do not induce emesis. Activated charcoal: administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents.
   Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.
   Skin
Remove contaminated clothing and jewelry. Wash the skin, including hair and nails, vigorously; do repeated soap washings. Discard contaminated clothing.
   Eyes
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Transport.
UN number
2757
Response guide
Hazard class
6.1
Packing Group
I; II; III
 
USCG CHRIS Code
MCD