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Benomyl (Total Dust)

General Description

  • Synonyms: Methyl 1-(butylcarbamoyl)-2-benzimidazolecarbamate; Benlate; Tersan 1991
  • OSHA IMIS Code Number: B407
  • Chemical Abstracts Service (CAS) Registry Number: 17804-35-2
  • NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: DD6475000; 14849
  • Chemical Description and Physical Properties:
    • white crystalline solid, essentially insoluble in water or oil
    • formulation: 50% wettable powder soluble in xylene, acetone, DMF, and chloroform
    • molecular weight: 290

Exposure Limits

  • American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 0.84 ppm, 10 mg/m3 TWA; Appendix A4 (Not Classifiable as a Human Carcinogen)

Health Factors

  • Health Effects: LD50 (oral, mammal) 10 g/kg; Systemic fungicide

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):
  • OSHA Versatile sampler (OVS-2)-13 mm XAD-2 tube (270/140 mg sections, 20/60 mesh) with Glass Fiber Filter enclosed
  • analytical solvent: Acetonitrile
  • maximum volume: 60 Liters
  • maximum flow rate: 1.0 L/min
  • current analytical method: High Performance Liquid Chromatography; HPLC/UV
  • method reference: 2 (OSHA In-House File)
  • method classification: Not Validated
Wipe Sampling Method:
  • Glass Fiber Filter
Bulk Method:
  • Limit the amount of bulk submitted to one gram or one mL.
Conditions:

Column: Chromasil C18 5 um mobile phase: 70% acetonitrile/30% water; 1 mL/min ultra violet detector: 286, 218 nm retention time: 3.5 min detection limit: 10 ng/inj

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