Aldicarb

  • 2-Methyl-2-(methylthio)propionaldehyde O-methylcarbamoyl)oxime
  • 2-Methyl-2-(methylthio)propanal O-((methylamino)carbonyl)oxime
Formula
C7H14N2O2S
Structure
Description
White crystals with a slightly sulfurous odor.
Uses
Soil application for control of chewing & sucking insects (esp aphids, whiteflies, leaf miners, & soil-dwelling insects), spider mites, & nematodes in glasshouse & outdoor ornamentals, sugar beet, fodder beet, strawberries, potatoes, onions, hops, vine nurseries, tree nurseries, groudnuts, soya beans, citrus fruit, bananas, coffee, sorghum, pecans cotton, sweet potatoes & other crops.

Registry Numbers and Inventories.
CAS
116-06-3
EC (EINECS/ELINCS)
204-123-2
EC Index Number
006-017-00-X
EC Class
Very toxic; Toxic; Dangerous for the Environment
RTECS
UE2275000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Mutagen; Human Data
UN (DOT)
2757
Merck
12,223
Beilstein/Gmelin
2046931
RCRA
P070
EPA OPP
98301
Swiss Giftliste 1
G-3334
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed

Properties.
Formula
C7H14N2O2S
Formula mass
190.27
Melting point, °C
99-100
Boiling point, °C
251
Vapor pressure, mmHg
3.5X10-5 at 20 C
Vapor density (air=1)
6.6
Critical temperature
443
Critical pressure
26.2
Density
1.195 g/cm3 (20 C)
Solubility in water
6 g/L
Partition coefficient, pKow
1.13

Hazards and Protection.
Storage
Store at in a clean, dry, and well-ventilated area.
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
Wear long-sleeved clothing and protective gloves when handling. Wear appropriate chemical protective clothing, gloves, boots and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Caution : Avoid sources of heat including fire. Aldicarb will liberate toxic nitrogen and sulfur oxide gases when heated. (Non-Specific -- Carbamate Pesticide, solid) 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. Do not touch spilled material; stop leak if you can do it without risk. Use water spray to reduce vapors. Small spills: take up 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.
Stability
Poor stability at 50 C; unstable in alkali analysis. Indicated that this material had not changed under storage conditions for approx 4 years.
Incompatibilities
Incompatible with highly alkaline substances.
Decomposition
When heated to decomposition, aldicarb emits very toxic fumes of nitrogen oxides and sulfur oxides.

Fire.
Fire fighting
(Non-Specific -- Carbamate Pesticide, Solid) Stay upwind; keep out of low areas. Ventilate closed spaces before entering them. 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.(Non-Specific -- Carbamate Pesticide, Solid) Some of these materials may burn but none of them ignite readily. Small fires: dry chemical, carbon dioxide, water spray, or foam. Large fires: water spray, fog or foam.
Fire potential
Aldicarb is non-flammable and is difficult to ignite, but it may burn.
Hazards
When heated to decomposition, it emits very toxic fumes of nitrogen oxides and sulfur oxides. Incompatible with highly alkaline substances. Unstable in alkali; poor stability at 122F.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Poison_Class
1
Exposure effects
Rapid breathing may occur. Headache, blurred vision, miosis, tremor, muscle twitching, seizures, 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. Aldicarb was not teratogenic in rats or rabbits, but fetal rats were more sensitive to cholinesterase inhibition in the brain than the dams. Two stillbirths occurred after pregnant women consumed aldicarb-contaminated watermelons.
   Ingestion
Nausea, vomiting, diarrhea, and abdominal cramping may be noted.
   Inhalation
Dyspnea, rales, bronchoconstriction and pulmonary edema may occur.
   Skin
Diaphoresis may be seen.
   Eyes
Pinpoint pupils, tearing and excessive salivation may be seen.

First aid
 
   Ingestion
Seek medical assistance.
   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
ALB