Reference Source

Methyl acetylene (Propyne)

For Methyl acetylene (Propyne), cas no. is 74-99-7; pel (ppm) is 1000; pel (mg/m³) is 1650, verified against its source on 2026-08-05.

Substance
Methyl acetylene (Propyne)
CAS No.
74-99-7
PEL (ppm)
1000
PEL (mg/m³)
1650
Sourceosha.gov
Verified2026-08-05
Review by2027-08-05
DatasetUS workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

What the source says

Methyl acetylene (Propyne) | 74-99-7 | 1000 | 1650 | - |

— osha.gov, retrieved 2026-08-05

Source

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.