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Chemical Sampling Information
Methomyl
 Field Definitions
 Analytical Methods
General Description

NAME: Methomyl

SYNONYM(s): N-[[(Methylamino)carbonyl]oxy]ethanimidothioic Acid Methyl Ester; Nudrin; Lannate

IMIS: 1644

CAS: 16752-77-5

NIOSH: RTECS AK2975000; 2876

DESCRIPTION:

Solid.
MP: 78-79 C



Exposure Limits

ACGIH TLV: 2.5 mg/m3 TWA; Appendix A4 (Not Classifiable as a Human Carcinogen)

NIOSH REL: 2.5 mg/m3 TWA

Health Factors

HEALTH EFFECTS: Cholinesterase inhibition (HE6) Mutagen (HE2); LD50 (oral, rat) 17 mg/kg

Monitoring

PRIMARY SAMPLING/ANALYTICAL METHOD (SLC1):



MEDIA: OSHA Versatile Sampler (OVS-2) - 13 mm XAD-2 tube (270/140 mg sections, 20/60 mesh) with Glass Fiber Filter enclosed
ANL SOLVENT: Acetonitrile
MAX V: 60 Liters   MAX F: 1.0 L/min
ANL 1: High Performance Liquid Chromatography; HPLC/UV
REF: 2 (OSHA In-house File)
CLASS: Partially Validated

COND: HPLC/UV; Acetonitrile extraction; C18 column; 25% methanol 75% water; 1 mL/min; UV Det: 210; Retention time, 4.7 min; DL 8.8 ng/inj; C/P

WIPE:

Yes, with Glass Fiber Filter.

BULK METHOD:

Limit the amount of bulk submitted to one gram or one mL.


Revision Date: 01/12/1999
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