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Coal Tar Pitch Volatiles (benzene soluble fraction)

General Description

Synonyms: Coal tar pitch; Oil pitch; Pitch; CTPV; Coal tar distillates

Components (contains detectable quantities of one or more of the following polycyclic aromatic hydrocarbons [PAHs]): Benz[a]anthracene; Benzo[b]fluoranthene; Chrysene; Anthracene; Benzo[a]pyrene; Phenanthrene; Acridine; Pyrene

OSHA IMIS code: 0700

CAS number: 65996-93-2

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method:
  • pre-cleaned glass fiber filter (Gelman Type A/E)
  • maximum volume: 960 L
  • minimum flow rate: 1.5-2.0 L/min
  • current analytical method: extraction-gravimetric
  • method reference: OSHA 58 (fully validated)
  • sampling and analytical error: 0.15
  • note: OSHA personnel can obtain pre-cleaned filters, vials, and Teflon-lined caps from the OSHA-Salt Lake Technical Center. After sampling, filter must be transferred to a vial with a Teflon-lined cap. Sample must be protected from direct sunlight. If chemicals are present that may be soluble in benzene, such as sulfur, please note them on the 91A form, because additional analyses may be possible to determine the extent of interference.
Bulk Method:
  • Limit the amount of bulk submitted to 1 g or 1 mL

Exposure Limits and Health Effects (Updated September 6, 2012)

Standard Set By Exposure Limit Health Effect Codes -- Health Effects and Target Organs
OSHA PEL - General Industry
See 29 CFR 1910.1000 Table Z-1
0.2 mg/m3 (benzene soluble fraction) TWA HE2 -- lung and other tumors
OSHA PEL - Construction Industry
See 29 CFR 1926.55 Appendix A
0.2 mg/m3 (benzene soluble fraction) TWA HE2 -- lung and other tumors
OSHA PEL - Shipyard Employment
See 29 CFR 1915.1000 Table Z-Shipyards
0.2 mg/m3 (benzene soluble fraction) TWA HE2 -- lung and other tumors
NIOSH REL 0.1 mg/m3 (cyclohexane extractable fraction) TWA
HE2 -- cancer of the respiratory tract, kidney, bladder, and skin
ACGIH TLV® (1984) 0.2 mg/m3 (benzene soluble aerosol) TWA
HE2 -- lung and other tumors
CAL/OSHA PELs 0.2 mg/m3 TWA HE2 -- lung and other tumors

Carcinogenic classification:

EPA Inhalation Reference Concentration (RfC): Not established

ATSDR Inhalation Minimal Risk Levels (MRLs): Not established

NIOSH IDLH concentration: 80 mg/m3 (benzene soluble fraction)

Notes on other potential health effects and hazards:

  1. Coal tar pitch is combustible and decomposes when heated above 400°C, producing toxic fumes. It reacts with strong oxidants (NIOSH/IPCS 2002).
  2. Researchers found a mathematical relationship between polycyclic aromatic hydrocarbon air concentrations and 1-hydroxypyrene concentration (biological monitoring) in urine. Researchers determined that coke oven workers with a urinary concentration of 1-hydroxypyrene of 2.3 µmol/mol creatinine after three work days were exposed to the coal tar pitch volatile TLV air concentration (Jongeneelen 1992).
  3. Deaths have been reported from atherosclerosis among Norwegian aluminum smelter workers due to cumulative exposure to coal tar pitch volatiles (Bingham et al. 2001).

Partial reference list:

  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Coal Tar Pitch Volatiles. 2016.
  • Bingham, E., Cohrssen, B., Powell, C.H.: Patty's Toxicology Volumes 1-9 5th ed. John Wiley & Sons. New York, N.Y. p. 1:773, 2001.
  • California Occupational Safety & Health Standards Board: Initial and Final Statement of Reasons August 3, 2010.
  • Jongeneelen, F.: Biological exposure limit for occupational exposure to coal tar pitch volatiles at cokeovens. Int Arch Occup Environ Health. 63(8):511-516, 1992.
  • NIOSH: Occupational Health Guideline for Coal Tar Pitch Volatiles. 1978
  • NIOSH/CEC/IPCS: International Chemical Safety CardsCoal Tar Pitch. March 2002.

Chemical Sampling Information

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