Hafnium

For Hafnium, cas no. is 7440-58-6; pel (mg/m³) is 0.5, verified against its source on 2026-08-05.

What the source says

Hafnium | 7440-58-6 | - | 0.5 | - |

— osha.gov, retrieved 2026-08-05

Sources

• osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
• dir.ca.govhttps://www.dir.ca.gov/title8/5155.html

Last verified against source: 2026-08-05. Scheduled for re-check by: 2027-08-05. This page as Markdown · OKF concept · full dataset as JSON.