Styrene
CAS Number
100-42-5Synonym
Cinnamene; Cinnamenol; Cinnamol; Diarex HF 77; Ethylbenzene; NCI-C02200; Phenethylene; Phenylethene; Phenyl ethene; Phenylethylene; Styrene monomer; Styrol; Styrolene; Styron; Styropol; Styropor; Vinylbenzol; Vinyl benzene; Vinylbenzene
Occurrence/Use
Precursor to polystyrene and several copolymers; production of plastic, synthetic rubber, insulation and protective coatings, construction materials, vehicle components, food containers; flavoring agent; component of automobile and tobacco smoke
Cancer Potency Information
| Latest Criteria: | California Public Health Goals |
|---|
Air
Acute RELs
| Acute REL (μg/m3): | 21000 |
|---|---|
| Species: | Human |
| Acute REL Toxicologic Endpoint: | Respiratory and eye irritation |
| Acute REL Target Organs: | Respiratory system, eyes |
| Severity: | Mild |
| Last Acute REL Revision: | 1999 |
| Acute Reference Exposure Levels Comments: |
OEHHA 2008. Technical Supporting Document for Noncancer RELs, Appendix D2. |
Chronic REL
| Chronic Inhalation REL (μg/m3): | 900 |
|---|---|
| Chronic Target Organs: | Nervous system |
| Human Data: | Yes |
| 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)
27 µg/day
| Cancer |
Public notices related to this chemical
- Notice of Intent to List: Styrene
- Styrene Listed Effective April 22, 2016 as Known to the State of California to Cause Cancer
- Proposed Amendment to Section 25705, Specific Regulatory Levels Posing No Significant Risk: Styrene
- Notice of Amendment to Section 25705, No Significant Risk Level for Styrene
- Issuance of Safe Use Determination for Styrene in Fiber Care Baths, Inc. Bathware Products Manufactured Utilizing 1st And 2nd Laminations Systems and Lv-9800 Acrylated Gel-Coat
Water
California Public Health Goals Data
| Health Risk Category: | Carcinogenicity |
|---|---|
| Public Health Goal (mg/L): | 0.0005 |
| Public Health Goal - Download: | Public Health Goal for Styrene in Drinking Water |
| Cancer Risk at PHG: | 0.000001 |
| MCL value (mg/L): | 0.1 |
| Cancer Risk at MCL: | 0.0002 |
| Last PHG Revision : | 2010 |
| California PHG Comments: |
OEHHA 2013. Health Risk Information for Public Health Goal Exceedance Reports. |