Beryllium Oxide
CAS Number
1304-56-9Synonym
Beryllia; Beryllium monoxide; Bromellete; Thermalox 995
Occurrence/Use
Sintered to produce ceramic; semiconductor parts, filler in thermal interface materials, electronic and microelectronic applications
Soil Screening
| Last CHHSL revision: | 3/2009 |
|---|---|
| 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
| Latest Criteria: | California Public Health Goals |
|---|---|
| Inhalation Unit Risk (μg/cubic meter)-1: | 2.4 E-3 |
| Inhalation Slope Factor (mg/kg-day)-1: | 8.4 E+0 |
| Comments/References: |
OEHHA 2003. Public Health Goal for Beryllium and Beryllium Compounds in Drinking Water.
US EPA 1998. IRIS Database: Beryllium and compounds.
US EPA 1987. Relative Carcinogenic Potencies Among 59 Chemicals. |
Air
Chronic REL
| Chronic Inhalation REL (μg/m3): | 0.007 (inhalation); 2.0 μg/kg BW-day (oral) |
|---|---|
| Chronic Target Organs: | Inhalation: Respiratory system, immune system. Oral: Alimentary system (gastrointestinal tract) |
| Human Data: | Yes |
| Last Chronic REL Revision: | 2001 |
| Chronic Reference Exposure Levels Comments: |
OEHHA 2008. Technical Supporting Document for Noncancer RELs, Appendix D3. Listed as Beryllium & beryllium compounds. |
Water
California Public Health Goals Data
| Public Health Goal (mg/L): | 0.001 |
|---|---|
| Public Health Goal - Download: | bephg92303.pdf |