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Chemical Sampling Information (CSI)
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General Description

Synonyms: Actybaryte; Artificial Barite; Barium Sulphate; Sulfuric Acid, Barium Salt (1:1)

OSHA IMIS Code Number: B104

Chemical Abstracts Service (CAS) Registry Number: 7727-43-7

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: CR0600000; 11862

Chemical Description and Physical Properties:

molecular weight: 233.40
molecular formula: O4S.Ba
Exposure Limits

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 5 mg/m3 TWA

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Tared Low Ash Polyvinyl Chloride (LAPVC) filter 5 microns preceded by 10 mm Nylon Cyclone
    maximum volume: 816 Liters
    minimum volume: 408 Liters
    maximum flow rate: 1.7 L/min
    current analytical method: Gravimetric
    method reference: 11, 12
    sampling and analytical error: 0.10
    method classification: Fully Validated
    note: Field method. If the gross weight of the sample yields a concentration below the standard for the air contaminate, do not submit sample to SLTC for analysis.

    current analytical method: Atomic Absorption Spectroscopy; AAS
    method reference: (OSHA ID-121)
    method classification: Not Validated
    note: Submit as a separate sample. An elemental analysis is + performed for Barium and reported as the compound.

Conditions:

  • Barium Sulfate is soluble in concentrated sulfuric acid. The ICP digestion (Sulfuric, Hydrochloric acids) is performed on samples with analysis by AAS.
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