BENZO[A]PYRENE†

Chemical Identification
CAS # 50-32-8
Formula

C₂₀H₁₂

Synonyms

BaP, 1,2-benzpyrene; 3,4-BP; 3,4-benzo(a)pyrene; 4,5-benzpyrene; 6,7-benzopyrene; benzo(d,e,f)chrysene; B(a)P). Synonyms vary depending upon the specific compound (e.g., pyrene, phenanthrene, acridine, chrysene, anthracene)

Physical Properties
Physical description Odorless, silver-gray to black solid.
Boiling point 5612°F Molecular weight 252.32
Freezing point/melting point 3497-3515°F Vapor pressure depends upon the specific compound
Flash point Vapor density 8.7
Specific gravity >1 Ionization potential
Lower explosive limit (LEL) Upper explosive limit (UEL) 2719°F
NFPA health rating 0 NFPA fire rating 1
NFPA reactivity rating 0 NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs
Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 0726
Sampling group
Sampler/Sampling media Coal Tar Pitch Volatiles (CTPV) Sampling Filters and Cassette [SLTC109]
Sampling time*

480 min

Sampling volume (TWA)*

960 L

Sampling flow rate (TWA)*

2 L/min

Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments HPLC-UV
Method reference OSHA 58 (fully validated)
Notes

OSHA 58 is validated in conjunction with Coal Tar Pitch Volatiles and Coke Oven Emissions.

OSHA personnel can obtain pre-cleaned filters, vials, and teflon-lined caps from the SLTC.

Special requirements

These media are prepared by SLTC as needed and are not available for immediate shipment. Please allow time for SLTC to prepare these media prior to sampling.

After sampling, filter must be transferred to a vial with a teflon-lined cap. Sample must be protected from direct sunlight.

* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Wipe Method
Sampler/Sampling media
Bulk Method
Bulk Method
On-Site Screening Techniques
Device
Model/Type
Sampling information
(see manufacturer instructions)
Exposure Limits
OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
NIOSH REL
Up to 10-hour TWA
(ST) STEL
(C) Ceiling
ACGIH TLV©
8-hour TWA
(ST) STEL
(C) Ceiling
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
PEL-TWA

0.2 mg/m³ as Coal tar pitch volatiles (benzene soluble fraction)

REL-TWA

0.1 mg/m³ as Coal tar pitch volatiles (cyclohexane extractable fraction)

TLV-TWA

Exposure by all routes should be carefully controlled to levels as low as possible. [1990]

PEL-TWA

0.2 mg/m³ as Coal tar pitch volatiles

PEL-STEL REL-STEL TLV-STEL PEL-STEL
PEL-C REL-C TLV-C PEL-C
Skin notation

N

Skin notation

N

Skin notation

N

Skin notation

N

Notes:

See 29 CFR 1910.1000 Table Z-1.

Notes:

CARCINOGEN (Ca); COAL TAR PITCH VOLATILE, CYCLOHEXANE-EXTRACTABLE FRACTION. See Appendix A, NIOSH Potential Occupational Carcinogens and Appendix C, Supplementary Exposure Limits.

Notes:

BEI®

Notes:
Health factors:  See NIH-NLM PubChem. IDLH

80 mg/m³

Carcinogenic classifications: EPA-B2, IARC-1, NIOSH-Ca, NTP-R, TLV-A2 Notes:

Ca

AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Last Updated Date : 01/28/2021