Naphthalene

CAS Number

91-20-3

Synonym

Napthalin; Naphthene; EPA Pesticide Code: 055801

Occurrence/Use

Household fumigant (mothballs, toilet deodorant blocks), pyrotechnics; chemical precursor to phthalic anhydride, 2-naphthol, surfectants, resins, dyes, insecticide, solvents, and others; component of petroleum, coal, and tobacco smoke

Naphthalene

Soil Screening

Last CHHSL revision: 1/2005
CHHSL Comments:

For chemical-specific screening levels for use in assessing contaminated sites, please see HHRA Note 3 (DTSC HERO). https://www.dtsc.ca.gov/assessingrisk/humanrisk2.cfm

Cancer Potency Information

Inhalation Unit Risk (μg/cubic meter)-1: 3.4 E-5
Inhalation Slope Factor (mg/kg-day)-1: 1.2 E-1
Oral Slope Factor (mg/kg-day)-1: 1.2 E-1
Comments/References:

OEHHA 2009. Air Toxics Hot Spots Program Technical Support Document for Cancer Potencies. Appendix B. Chemical-specific summaries of the information used to derive unit risk and cancer potency values. Updated 2011.

Air

Chronic REL

Chronic Inhalation REL (μg/m3): 9
Chronic Target Organs: Respiratory system
Human Data: No
Last Chronic REL Revision: 2000
Chronic Reference Exposure Levels Comments:

OEHHA 2008. Technical Supporting Document for Noncancer RELs, Appendix D3

 

Proposition 65

Chemical Status

Cancer: Currently listed

Cancer

Cancer - Listing Mechanism
Authoritative Bodies-National Toxicology Program
Listed as causing : Listed as causing: Cancer
Date of Listing:

Safe Harbor Levels

No Significant Risk Level (NSRL)
5.8 µg/day
Cancer
Last NSRL/MADL Revision: 2005

Documents, Presentations, and Publications

Cancer:

Public notices related to this chemical

Water

California Public Health Goals Data

Notification Level (μg/L): 170
Notification Level - Download: palnaphthalene.pdf