Carbon Tetrachloride
CAS Number
56-23-5Synonym
Acritet; Benzinoform; Carbon tet; Carbona; Carbon chloride; Fasciolin; Flukoids; Freon 10; Mecatorina; Methane tetrachloride; Necatorina; Perchloromethane carbona; Tetrachloormetaan; Tetrachlorocarbon; Tetrafinol; Tetraform; Tetrasol; Tetrachloromethane; Univerm; Vermoestricid
Occurrence/Use
Dry cleaning agent, fire extinguisher, solvent, degreaser, refrigerant, chlorofluorocarbon feedstock. Use as fumigant banned in US in 1986 except for preservation of museum artifacts. Synthesis, use as CFC feedstock, and agricultural use have ceased in California.
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: | 4.2 E-5 |
|---|---|
| Inhalation Slope Factor (mg/kg-day)-1: | 1.5 E-1 |
| Oral Slope Factor (mg/kg-day)-1: | 1.5 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
Acute RELs
| Acute REL (μg/m3): | 1900 |
|---|---|
| Species: | Rat |
| Acute REL Toxicologic Endpoint: | Reproductive/ development; hepatoxicity; headaches, nausea, vomiting |
| Acute REL Target Organs: | Reproductive/ developmental, alimentary system (liver), nervous system |
| Severity: | Severe |
| 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): | 40 |
|---|---|
| Chronic Target Organs: | Alimentary system (liver), development, nervous 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
| Listed as causing : | Listed as causing: Cancer |
|---|---|
| Date of Listing: |
Safe Harbor Levels
| Cancer |
Water
California Public Health Goals Data
| Health Risk Category: | Carcinogenicity |
|---|---|
| Public Health Goal (mg/L): | 0.0001 |
| Public Health Goal - Download: | carbtet.pdf |
| Cancer Risk at PHG: | 0.000001 |
| MCL value (mg/L): | 0.0005 |
| Cancer Risk at MCL: | 0.000005 |
| Last PHG Revision : | 2000 |
| California PHG Comments: | OEHHA 2013. Health Risk Information for Public Health Goal Exceedance Reports |