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Carbon Tetrachloride

CAS Number

56-23-5

Synonym

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.

Carbon Tetrachloride

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: 

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: 

Proposition 65

Chemical Status

Cancer: 
Currently listed

Cancer

Listed for: 
Cancer
Date of Listing: 
10/01/1987
Basis for Listing: 
State's Qualified Experts

Safe Harbor Levels

Cancer
No Significant Risk Level (NSRL): 
5 µg/day

Water

California Public Health Goals Data

Health Risk Category: 
Carcinogenicity
Public Health Goal (mg/L): 
0.0001
Public Health Goal - Download: 
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: