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Chemical Sampling Information (CSI)
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General Description

Synonyms: Dowtherm A; Diphenyl oxide-diphenyl mixture; Phenyl Ether-Diphenyl Mixture

OSHA IMIS Code Number: 2053

Chemical Abstracts Service (CAS) Registry Number: 8004-13-5

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: DV1500000; 20643

NIOSH Pocket Guide to Chemical Hazards, Phenyl ether-biphenyl mixture (vapor): chemical description, physical properties, potentially hazardous incompatibilities, and more

Chemical Description and Physical Properties:

straw-colored liquid, which darkens on use, with an aromatic, somewhat disagreeable odor
molecular weight: 166
vapor pressure: 0.08 mm Hg at 25°C
boiling point: 495°F
melting point: 54°F

Incompatibilities: Strong oxidizers

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 1 ppm, 7 mg/m3 TWA

Construction Industry: 1 ppm, 7 mg/m3 TWA

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 1 ppm TWA

Health Factors

Potential Symptoms: Nausea; eye, nose, skin irritation

Health Effects: Irritation-Eye, Nose, Throat, Skin---Mild (HE16) Nausea (HE7); Cumulative liver and kidney damage (HE3)

Affected Organs: Eyes, skin, respiratory system

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: XAD-7 Tube (100/50 mg sections, 15/50 mesh)
    analytical solvent: Carbon Disulfide
    maximum volume: 20 Liters
    maximum flow rate:
    0.2 L/min
    current analytical method: Gas Chromatography; GC/FID
    method reference: 2 (OSHA In-House File)
    method classification: Partially Validated

  • sampling media: Silica Gel Tube (150/75 mg sections, 20/40 mesh)
    analytical solvent: Benzene
    maximum volume: 10 Liters
    maximum flow rate:
    0.2 L/min
    current analytical method: Gas Chromatography; GC/FID
    method reference: 1 (NIOSH S-73)
    sampling and analytical error: 0.15
    method classification: Fully Validated

Secondary Laboratory Sampling/Analytical Method (SAM2):

  • device: Instrumentation
    company: Infrared Spectrophotometer
    part #: MIRAN 1A & 1B
    range: 0.2 ppm @ 8.1 um
    class: Mfg

  • device: Instrumentation
    company: Infrared Spectrophotometer
    part #: MIRAN 103
    range: 0-10 ppm @ 8.06 um
    class: Mfg

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