Reference Source

Propylene oxide

For Propylene oxide, cas no. is 75-56-9; cercla rq (lbs) is 100; regulatory categories is 1,3, verified against its source on 2026-08-05.

Substance
Propylene oxide
CAS No.
75-56-9
CERCLA RQ (lbs)
100
Regulatory categories
1,3
EPCRA TPQ (lbs)
10,000 per ecfr.gov
EPCRA RQ (lbs)
100 per ecfr.gov
Sourceecfr.gov
Verified2026-08-05
Review by2027-08-05
DatasetUS federal chemical regulatory reporting thresholds by program (CERCLA, EPCRA, CAA)

What the source says

Propylene oxide | 75-56-9 | 1,3 | | 100 (45.4)

— ecfr.gov, retrieved 2026-08-05

What ecfr.gov says

75-56-9 | Propylene Oxide | f | 100 | 10,000 |

— ecfr.gov, retrieved 2026-08-05

Sources

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