<< Back to Chemical Sampling Information

Chemical Sampling Information (CSI)
Search (use word(s)/phrase)
Table of Contents
By Name
A B C D E F G H I J K L M
N O P Q R S T U V W X Y Z

By CAS Number
Quick Links

General Description

Synonyms: N-(Butoxymethyl)-2-chloro-N-(2,6-diethylphenyl)acetamide; Butachlor; Machete

OSHA IMIS Code Number: M175

Chemical Abstracts Service (CAS) Registry Number: 23184-66-9

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: AE1200000; 1364

Chemical Description and Physical Properties:

amber-colored liquid; used in pre-emergence weed control of rice fields; not marketed in U.S. since 1977
vapor pressure: approx. 0 mm Hg Solubility in water: 24 ppm
boiling point: 156°C (at 0.5 mm)
melting point: -5°C

Health Factors

Health Effects: LD50 (rats) 3120 mg/kg

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Glass Fiber Filter (37 mm)
    analytical solvent: Acetonitrile
    maximum volume: 100 Liters
    maximum flow rate: 1.0 L/min
    current analytical method: High Performance Liquid Chromatography; HPLC/U
    method reference: 2 (OSHA In-House File)
    method classification: Partially Validated

Conditions: Zorbax ODS column; 80% acetonitrile 20% water; 1.1 mL/min; Det: 214, 254 nm; retention time, 11 min.; Retention and extraction efficiencies tested; C/P JML 6-83

Bulk Method:

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

** All Trademarks are the property of their respective owners.