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Chemical Sampling Information (CSI)
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General Description

Synonyms: 2-Methyl-4-chlorophenoxyacetic acid; MCP

OSHA IMIS Code Number: M178

Chemical Abstracts Service (CAS) Registry Number: 94-74-6

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: AG1575000; 1940

Chemical Description and Physical Properties:

white crystalline solid
molecular weight: 200.54
melting point: 118°C

Health Factors

Health Effects: Similar to 2,4-D; LD50 (oral, rat) 700 mg/kg

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Glass Fiber Filter (37 mm)
    analytical solvent: Methanol
    maximum volume: 250 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: Not Validated

Conditions: Methanol Extraction; C-18; 60% methanol 40% water 1% acetic acid; 1 mL/min; UV Det: 254 nm; DL 5 ug/sample; C/P KM

Bulk Method:

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

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