--- type: threshold id: silica-amorphous-diatomaceous-earth-containing-less-than-1-crystalline-silica asset: workplace-exposure-limits title: "Silica, amorphous, diatomaceous earth, containing less than 1% crystalline silica — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side" sources: - https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1 source_quote: "Silica, amorphous, diatomaceous earth, containing less than 1% crystalline silica | 61790-53-2 | - | ( 3 ) | - |" generated: true harvested: 2026-08-05 stale_after: 2027-08-05 substance: "Silica, amorphous, diatomaceous earth, containing less than 1% crystalline silica" cas_number: "61790-53-2" verified: true --- **Substance:** Silica, amorphous, diatomaceous earth, containing less than 1% crystalline silica **CAS No.:** 61790-53-2 > Silica, amorphous, diatomaceous earth, containing less than 1% crystalline silica | 61790-53-2 | - | ( 3 ) | - | Source: