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Chemical Sampling Information (CSI)
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General Description

Synonyms: Cobalt metal dust; Cobalt metal fume

OSHA IMIS Code Number: 0350

Chemical Abstracts Service (CAS) Registry Number: 56-55-3

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: CV9275000

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: See Coal Tar Pitch Volatiles (Benzene Soluble Fraction)

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): Appendix A2 (Suspected Carcinogen)

Health Factors

Carcinogenic Classification:

National Toxicology Program: Suspect Human Carcinogen

International Agency for Research on Cancer (IARC): Group 2A, probably carcinogenic to humans [340 KB PDF, 6 pages]


Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):
  • sampling media: Pre-cleaned Glass Fiber Filter (37 mm)
    maximum volume: 960 Liters   
    maximum flow rate: 2.0 L/min
    current analytical method: High Performance Liquid Chromatography; HPLC/UV/FLU
    method reference: 2 (OSHA In-House File)
    method classification: Partially Validated
    note: OSHA personnel can obtain pre-cleaned filters, vials, and Teflon-lined caps from SLTC. Immediately after sampling, transfer filter to glass scintillation vial and seal with Teflon-lined cap. Protect from light.

Conditions:

  • column: C18
    mobile phase: 85:15 Acetonitrile: Water
    detector wavelength: 254nm
    flouresence detection limit:
      excitation: 254nm
      emissions: 370nm

Bulk Method:

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

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