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Chemical Sampling Information (CSI)
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General Description

Synonyms: 2-Carbomethoxy-1-methylvinyl dimethyl phosphate; Mevinphos

OSHA IMIS Code Number: 2065

Chemical Abstracts Service (CAS) Registry Number: 7786-34-7

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: GQ5250000; 27538

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: NA2783 152 Poison

NIOSH Pocket Guide to Chemical Hazards, Phosdrin: chemical description, physical properties, potentially hazardous incompatibilities, and more

Chemical Description and Physical Properties:

colorless or yellow liquid with a weak odor
molecular weight: 224
vapor pressure: 0.003 mm
boiling point: 99-103°F at 0.03 mm
melting point: -69°F

Incompatibilities: Strong oxidizers

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 0.1 mg/m3 (Skin)

Construction Industry: 0.1 mg/m3 TWA (Skin)

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 0.09 mg/m3 TWA; 0.03 ppm, 0.27 mg/m3 STEL (Skin); (TLV listed under Mevinphos)

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 0.01 ppm TWA, 0.03 ppm STEL (Skin)

Health Factors

Potential Symptoms: Miosis; rhinorrhea; headaches; tight chest, wheezing, laryngeal + spasms; salivation; cyanosis; anorexia; nausea, vomiting, abdominal cramps, diarrhea; paralysis, ataxia; convulsions; low blood pressure, cardiac irregularities; skin, eye irritation

Health Effects: Cholinesterase inhibition (HE6); LD50 (oral, rat) 3.7-6.1 mg/kg

Affected Organs: Respiratory system, CNS, CVS, skin, blood cholinesterase

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: OSHA Versatile Sampler (OVS-2) - 13 mm XAD-2 tube (270/140 mg sections, 20/60 mesh) with Glass Fiber Filter enclosed
    analytical solvent: Toluene
    maximum volume: 480 Liters
    maximum flow rate: 1.0 L/min (TWA)
    maximum volume: 15 Liters
    maximum flow rate: 1.0 L/min (STEL)
    current analytical method: Gas Chromatography; GC/FPD
    method reference: 2 (OSHA In-House File)
    method classification: Partially Validated
    note: OSHA personnel may obtain sampling tubes from the Salt Lake Technical Center.

Wipe Sampling Method:

  • sampling media: Glass Fiber Filter

Bulk Method:

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

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