1,4-Dichlorobenzene
CAS Number
106-46-7Synonym
p-DCB; 1,4-Dichlorobenzene; paracide; dichloricide; DCB; Dichlorocide; pdcb; pdb; Para-zene; Paramoth; p-chlorophenyl chloride; p-dichlorobenzol, p-dichlorobenzene
Occurrence/Use
Insecticide, germicide, space and garbage deodorizer; chemical intermediate in organic chemicals, dyes, and pharmaceuticals
Cancer Potency Information
| Inhalation Unit Risk (μg/cubic meter)-1: | 1.1 E-5 |
|---|---|
| Inhalation Slope Factor (mg/kg-day)-1: | 4.0 E-2 |
| Oral Slope Factor (mg/kg-day)-1: | 5.4 E-3 |
| 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. OEHHA 1997. Public Health Goal for 1,4-Dichlorobenzene in Drinking Water. |
Air
Acute RELs
| Acute REL (μg/m3): | 8700 |
|---|---|
| Species: | Rat |
| Acute REL Toxicologic Endpoint: | Development |
| Last Acute REL Revision: | 2025 |
| Acute Reference Exposure Levels Comments: |
1,4-Dichlorobenzene Reference Exposure Levels Technical Support Document |
8-Hour RELs
| 8-Hour Inhalation REL (μg/m3): | 5 |
|---|---|
| Last 8-Hour REL Revision: | 2025 |
| 8-Hour Reference Exposure Levels Comments: |
1,4-Dichlorobenzene Reference Exposure Levels Technical Support Document |
Chronic REL
| Chronic Inhalation REL (μg/m3): | 10 |
|---|---|
| Chronic Target Organs: | Respiratory system, male reproductive system |
| Human Data: | No |
| Last Chronic REL Revision: | 2025 |
| Chronic Reference Exposure Levels Comments: |
1,4-Dichlorobenzene Reference Exposure Levels Technical Support Document |
Proposition 65
Chemical Status
| Cancer: | Currently listed |
|---|
Cancer
Cancer - Listing Mechanism
State's Qualified Experts
| Listed as causing : | Listed as causing: Cancer |
|---|---|
| Date of Listing: |
Safe Harbor Levels
No Significant Risk Level (NSRL)
20 µg/day
| Cancer |
Water
California Public Health Goals Data
| Health Risk Category: | Carcinogenicity |
|---|---|
| Public Health Goal (mg/L): | 0.006 |
| Public Health Goal - Download: | 14dcbc.pdf |
| Cancer Risk at PHG: | 0.000001 |
| MCL value (mg/L): | 0.005 |
| Cancer Risk at MCL: | 0.0000008 |
| Last PHG Revision : | 1997 |
| California PHG Comments: |
OEHHA 2013. Health Risk Information for Public Health Goal Exceedance Reports |