Benomyl

  • Arilate
  • Benlat
  • Fundasol
  • Tersan
  • Methyl 1-(Butylcarbamoyl)benzimidazol-2-ylcarbamate
  • Methyl 1-(Butylcarbamoyl)-2-Benzimidazolecarbamate
Formula
C14H18N4O3
Structure
Description
Colorless to white crystals or off-white powder. Faint acrid odor.
Uses
Fungicide

Registry Numbers and Inventories.
CAS
17804-35-2
EC (EINECS/ELINCS)
241-775-7
EC Index Number
613-049-00-3
EC Class
Mutagenic Category 3
RTECS
DD6475000
RTECS class
Agricultural Chemical and Pesticide; Mutagen; Reproductive Effector; Primary Irritant
UN (DOT)
2757
Merck
12,1073
Beilstein/Gmelin
825455
Beilstein Reference
5-25-10-00390
RCRA
U271
EPA OPP
600051
Swiss Giftliste 1
G-4601
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Korea ECL
Listed

Properties.
Formula
C14H18N4O3
Formula mass
290.32
Melting point, °C
328 - 334
Vapor pressure, mmHg
4E-9
Solubility in water
Insoluble
Partition coefficient, pKow
2.12

Hazards and Protection.
Storage
Store in the dry state. Do not contaminate water, food, or feeds by storage or disposal. Keep benlate dry during storage to avoid certain chemical changes affecting fungicidal effectiveness. Keep container tightly closed when not in use.
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 appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Should a spill occur while you are handling this chemical, FIRST REMOVE ALL SOURCES OF IGNITION, then you should dampen the solid spill material with 60-70% ethanol and transfer the dampened material to a suitable container. Use absorbent paper dampened with 60-70% ethanol to pick up any remaining material. Seal the absorbent paper, and any of your clothes, which may be contaminated, in a vapor-tight plastic bag for eventual disposal. Solvent wash all contaminated surfaces with 60-70% ethanol followed by washing with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned.
Stability
Subject to decomp on storage in presence of moisture. Non-volatile @ room temperature.
Incompatibilities
Incompatible with strong acids, peroxides and strong oxidizers.

Fire.
Autoignition, °C
220
Fire fighting
Fires involving this material can be controlled with a dry chemical, carbon dioxide or Halon extinguisher. A water spray may also be used.
Fire potential
This material is nonflammable
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure limit(s)
TLV: 0.84 ppm; 10 mg/m3 (as TWA) (ACGIH 1997). OSHA PEL: TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp) NIOSH REL: See Appendix D
Poison_Class
3
Exposure effects
Benomyl has produced brain, eye and systemic malformations in rats, as well as adverse efffects on the male reproductive system of the rat.
   Inhalation
Benomyl is a potential mild respiratory irritant.
   Skin
Skin irritation, eczema and contact dermatitis has been described.
   Eyes
Rare eye irritation has been noted.

First aid
 
   Ingestion
DO NOT INDUCE VOMITING. If the victim is conscious and not convulsing, administer a slurry of activated charcoal in water and simultaneously call a hospital or poison control center. IMMEDIATELY transport the victim to a hospital.
   Inhalation
IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. IMMEDIATELY call a physician and be prepared to transport the victim to a hospital even if no symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used.
   Skin
IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.
   Eyes
First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.

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