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Chemical Sampling Information (CSI)
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General Description

Synonyms: o-o-Diethyl o(and s)-z-(ethylthio)ethyl phosphorothioate mixture; Systox; Bayer 8169; Demeton-o + Demeton-s; Demox; E-1059; Mercaptophos

OSHA IMIS Code Number: 0857

Chemical Abstracts Service (CAS) Registry Number: 8065-48-3

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: TF3150000; 59390

Chemical Description and Physical Properties:

light brown liquid with an odor of sulfur compounds.
molecular weight: 258
boiling point: (2 mm): 273°F
vapor pressure: Very low
melting point: -13°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): 0.05 mg/m3 TWA (Inhalable Fraction) (Vapor and Aerosol) (Skin)

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 0.1 mg/m3 TWA (Skin)

Health Factors

Potential Symptoms: Miosis, aching eyes; rhinorrhea; headaches; chest pain, wheezing, laryngeal spasms; salivation; cyanosis; anorexia, nausea, vomiting, abdominal cramps, diarrhea; local sweating; muscle fasciculation; weakness; paralysis; giddiness, confusion, ataxia; convulsions; coma; low blood pressure; cardiac irregularities; eye, skin irritation

Health Effects: Cholinesterase inhibition (HE6) Suspect teratogen (HE5); Mutagen (HE2)

Affected Organs: Respiratory system, CVS, CNS, skin, eyes, blood cholinestera

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 L/min
    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.

Secondary Laboratory Sampling/Analytical Method (SAM2):

  • CH 27501: 1 microgram

Wipe Sampling Method:

  • sampling media: Glass Fiber Filter

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