Diallate

  • Avadex
  • DATC
  • di-Allate
  • Dichloroallyl diisopropylthiocarbamate
  • S-(2,3-dichloroallyl) diisopropylthiocarbamate
  • 2,3-Dichloroallyl n,n-diisopropylthiolcarbamate
Formula
C10H17Cl2NOS
Structure
Description
Brown liquid.
Uses
An extremely active pre-emergence herbicide against certain annual monocots, particularly avena fatua, with safety for cereal grains at rates necessary to control the weeds. It has also shown promise as a sprout inhibitor in potatoes.

Registry Numbers and Inventories.
CAS
2303-16-4
EC (EINECS/ELINCS)
218-961-1
EC Index Number
006-019-00-0
EC Class
Carcinogenic Category 3; Harmful; Dangerous for the Environment
RTECS
EZ8225000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Mutagen
UN (DOT)
2902
Merck
12,3014
Beilstein/Gmelin
2210954
RCRA
U062
EPA OPP
78801
Swiss Giftliste 1
G-1487
Austrailia AICS
Listed

Properties.
Formula
C10H17Cl2NOS
Formula mass
270.22
Melting point, °C
25-30
Boiling point, °C
306
Vapor pressure, mmHg
0.0008 (25 C)
Density
1.188 g/cm3 (20 C)
Solubility in water
14 ppm (25 C)
Partition coefficient, pKow
5.13
Heat of vaporization
54.7 kJ/mol

Hazards and Protection.
Storage
Stable in storage. Keep away from alkali.
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 rubber gloves and goggles when handling. The use of neoprene gloves during tank fills reduced total exposure to diallate.
Respirators
Use NIOSH/MSHA approved respirator appropriate for exposure of concern.
Small spills/leaks
Evacuate area and ventilate. Wear protective equipment. If required, use an inert absrobent. Sweep up and place in an appropriate container for disposal. Wash contaminated surfaces.
Stability
Indefinitely stable; not sensitive to light or heat.
Incompatibilities
Strong oxidizing agents.

Fire.
Flash Point,°C
139
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use agent most appropriate to extinguish fire.
Fire potential
Nonflammable

Health.
Poison_Class
3
Exposure effects
Exposure to thiram or mbdt-carb (based on animal studies) may cause weakness, ataxia, ascending paralysis and hypothermia. Peripheral neuropathy (pain, numbness and weakness of the extremities) has been noted following exposure to thiuram (the ethyl analog of thiram). No adverse reproductive effects (testicular parameters) in male mice were observed following methyl thiophanate doses up to 1000 mg/kg orally for 5 consecutive days (Traina et al, 1998). Maternal toxicity was evident in female rats.
   Ingestion
Nausea, vomiting and diarrhea may occur.
   Inhalation
Respiratory failure, requiring ventilatory support, has been reported following ingestions.
   Skin
Exposure to dusts, sprays, solutions, wettable powder suspensions or emulsions of these agents may lead to skin and mucous membrane irritation.

First aid
 
   Ingestion
Ipecac induced vomiting is not recommended because of the potential for cns depression and seizures. Consider after ingestion of a potentially life-threatening amount of poison if it can be performed soon after ingestion (generally within 1 hour). Activated charcoal: administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents. Intravenous fluids may be useful in restoring extracellular fluid volume following severe vomiting and diarrhea. Oxygen therapy is effective in relieving the distress of antabuse-like reactions rarely associated with exposure to thiram and possibly the mbdt-carb compounds. No specific antidotes are available for poisoning by these compounds. Activated charcoal: administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents.
   Inhalation
If symptoms develop, move individual away from exposure and into fresh air. If symptoms persist, seek medical attention. If breathing is difficult, administer oxygen. Keep person warm and quiet; seek immediate medical attention.
   Skin
Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists.
   Eyes
If symptoms develop, immediately move individual away from exposure and into fresh air. Flush eyes gently with water for at least 15 minutes while holding eyelids apart; seek immediate medical attention.

Transport.
UN number
2902
Response guide
USCG CHRIS Code
DLT