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Chemical Sampling Information (CSI)
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General Description

OSHA IMIS Code Number: B128

Chemical Abstracts Service (CAS) Registry Number: 92-87-5

Exposure Limits

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): Lowest Feasible Concentration Carcinogen

Health Factors

Carcinogenic Classification:

International Agency for Research on Cancer (IARC): Group 1, carcinogenic to humans [392 KB PDF, 8 pages]

National Toxicology Programs (NTP): Known to be a Human Carcinogen [169 KB PDF, 4 pages].
Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Polytetrafluoroethylene Filter, 5 micron
    maximum volume: 500 Liters
    maximum flow rate: 3.0 L/min
    current analytical method: High Performance Liquid Chromatography; HPLC/UL52.
    method reference: 1 (NIOSH 5013 [28 KB PDF, 5 pages])
    method classification: Partially Validated
    note: This method does not differentiate between different dyes. Protect samples from heat and light.

Conditions: column: C18 mobile phase: 60:40 Methanol: Phosphate Buffer detection limit: Direct Blue 6 - 0.94 ug/m3, Direct Brown 95 - 7.7 ug/m3, Direct Black 38 - 15 ug/m3

Wipe Sampling Method:

  • sampling media: Glass Fiber Filter

Bulk Method:

  • For any dye analysis, a bulk sample of the dye must be sent to the Salt Lake Technical Center. Limit the amount of bulk submitted to one gram or approx. one mL. If possible include Material Safety Data Sheet and color index number of dye.
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