Naphthalene
CAS Number
91-20-3Synonym
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
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
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Proposition 65
Chemical Status
| Cancer: | Currently listed |
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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 |
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Documents, Presentations, and Publications
| Cancer: |
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Public notices related to this chemical
- Amendments to Text of Regulations Title 22, California Code Of Regulations Section 12705. Specific Regulatory Levels Posing No Significant Risk Section 12805. Specific Regulatory Levels: Chemicals Causing Reproductive Toxicity
- Notice of Addition of Documents and Information to Rulemaking File, Amendment to Title 22, California Code of Regulations Section 12705, Oal Rulemaking Files 04-1110-06s, 05-0318-04sr, 05-0602-03sr, And 05-0701-01sr (Naphthalene)
- Notice of Modifications to the Risk Assessment Document for Naphthalene
- Notice of Amendments to Text of Regulations, Title 22, California Code of Regulations, Sections 12705 and 12805
- Notice of Proposed Rulemaking, Title 22, California Code of Regulations, Proposed Amendment To Section 12705 and Section 12805
- Chemical Listed Effective April 19, 2002 as Known to the State of California to Cause Cancer: Naphthalene
- Notice of Intent to List Chemical: Naphthalene
- 23 Chemicals Under Consideration for Possible Listing
- Availability of Final Data Summaries and Priorities for 33 Chemicals With Respect to Their Potential to Cause Cancer
Water
California Public Health Goals Data
| Notification Level (μg/L): | 170 |
|---|---|
| Notification Level - Download: | palnaphthalene.pdf |