2-METHYLNAPHTHALENE

Chemical Identification
CAS #	91-57-6
Formula	C₁₁H₁₀₀
Synonyms	β-methylnaphthalene

Physical Properties
Physical description	White crystalline solid.
Boiling point	466-468°F	Molecular weight	142.2
Freezing point/melting point	94.3°F	Vapor pressure
Flash point	208°F	Vapor density
Specific gravity	1.0058	Ionization potential
Lower explosive limit (LEL)		Upper explosive limit (UEL)
NFPA health rating		NFPA fire rating
NFPA reactivity rating		NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.)
Sampling group
Sampler/Sampling media
Sampling time^*
Sampling volume (TWA)^*
Sampling flow rate (TWA)^*
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments
Method reference
Notes
Special requirements

^* 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.

Bulk/Wipe Method
Wipe Sampler/Sampling media
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		REL-TWA		TLV-TWA	0.5 ppm [2006]	PEL-TWA
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C		TLV-C		PEL-C
Skin notation	NA	Skin notation	NA	Skin notation	Y	Skin notation	NA
Notes: Not established		Notes: Not established		Notes:		Notes: Not established
Health factors: See NIH-NLM PubChem.		IDLH
Carcinogenic classifications: TLV-A4		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - 2-Methylnaphthalene

NIOSH: Pocket Guide to Chemical Hazards - 2-Methylnaphthalene

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - 1-Methylnaphthalene [90-12-0] and 2-Methylnaphthalene [91-57-6]. See annual publication for most recent information.
Agency for Toxic Substances and Disease Registry (ATSDR): Toxicological profile for naphthalene, 1-methynaphthalene and 2-methylnaphthalene. US Government Printing Office 1995-639-298, 200 pp., 1995.
Korsak, Z., Majcherek, W. and Rydzynski, K.: Toxic effects of acute inhalation exposure to 1-methylnaphthalene and 2-methylnaphthalene in experimental animals. Int. J. Occup. Med. Environ. Health 11(4): 335-342, 1998.
Melancon, M.J., Rickert, D.E. and Lech, J.J.: Metabolism of 2-methylnaphthalene in the rat in vivo. I. Identification of 2-naphthoylglycine. Drug Metab. Dispos. 10(2): 128-133, 1982.
Schultz, M.A., Morin, D., Chang, A.-M., Buckpitt, A.: Metabolic capabilities of CYP2F2 with various pulmonary toxicants and its relative abundance in mouse lung subcompartments. J. Pharmacol. Exp. Ther. 296(2): 510-519, 2001.
Teshima, R., Nagamatsu, K., Ikebuchi, H., Kido, Y. and Terao, T.: In vivo and in vitro metabolism of 2-methylnaphthalene in the guinea pig. Drug. Metab. Dispos. 11(2): 152-157, 1983.

Last Updated Date : 12/15/2020

2-METHYLNAPHTHALENE

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References