Metolcarb

  • C-3
  • m-Cresyl methylcarbamate
  • DRC 3341
  • Metacrate
  • Metholcarb
  • 3-Methylphenyl methylcarbamate
Formula
C9H11NO2
Structure
Description
Colorless crystalline solid.
Uses
An insecticide used to control sucking insects on rice such as leafhoppers and planthoppers. Used for control of citrus mealybugs, onion thrips, mediterranean fruit flies, pink bollworms and cotton aphids.

Registry Numbers and Inventories.
CAS
1129-41-5
EC (EINECS/ELINCS)
214-446-0
EC Index Number
006-056-00-2
EC Class
Harmful; Dangerous for the Environment
RTECS
FC8050000
RTECS class
Agricultural Chemical and Pesticide; Mutagen; Human Data
Beilstein/Gmelin
2045865
Beilstein Reference
4-06-00-02050
RCRA
P190
Swiss Giftliste 1
G-6624
Canada DSL/NDSL
NDSL
US TSCA
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C9H11NO2
Formula mass
165.21
Melting point, °C
78 - 82
Vapor pressure, mmHg
1E-5
Solubility in water
2.6 g/L @ 30 C
Partition coefficient, pKow
1.70

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
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
When handling metolcarb, a respirator with gas absorbent should be used. Protective clothing includes gloves, gas mask or respiratory, goggles, and clothing. When handling, wear a respiratory with gas absorbent. Avoid skin and eye contact.
Respirators
Use NIOSH/MSHA approved respirator appropriate for exposure of concern.
Small spills/leaks
Avoid inhalation. For solid carbamate pesticides, use the following procedures. For small spills, take up with sand or other noncombustible absorbent material and place in containers for later disposal. For small dry spills, with clean shovel place material into clean, dry container and cover; move container from spill area. For large spills, dike far ahead of spill for later disposal. Do not touch spilled material. Use water spray to reduce vapors.
Stability
No data.
Incompatibilities
Incompatible with strong acids and bases, and especially

Fire.
Fire fighting
Procedures for carbamate pesticides, solid, include the following. Stay upwind and keep out of low areas. Wear positive pressure breathing apparatus and special protective clothing. 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.Metolcarb is a carbamate insecticide.Solid carbamate pesticides may burn but do not ignite readily. For small fires, use dry chemical, carbon dioxide, water spray, and foam. For large fires, use water spray, fog or foam. Dike fire control water for later disposal.
Fire potential
Neither flammable nor autoignitible.
Hazards
As for other solid carbamate pesticides, container may explode in heat of fire. Fire and runoff from fire control water may produce irritating or poisonous gases. Emits toxic fumes of nitrogen oxides when heated to decomposition. Avoid decomposing heat.

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. Metolcarb was fetotoxic in rats, crossed the placenta in rats and ewes, and was detectible in ewe's milk.
   Ingestion
Nausea, vomiting, diarrhea, and abdominal cramping may be noted.
   Inhalation
Dyspnea, rales, and pulmonary edema may occur.

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 patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
   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.
USCG CHRIS Code
MTL