Reference Source

beta-Propiolactone

For beta-Propiolactone, cas no. is 57-57-8; cercla rq (lbs) is 10; regulatory categories is 3, verified against its source on 2026-08-05.

Substance
beta-Propiolactone
CAS No.
57-57-8
CERCLA RQ (lbs)
10
Regulatory categories
3
EPCRA TPQ (lbs)
500 per ecfr.gov
EPCRA RQ (lbs)
10 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

beta-Propiolactone | 57-57-8 | 3 | | 10 (4.54)

— ecfr.gov, retrieved 2026-08-05

What ecfr.gov says

10 | 57-57-8 | Propiolactone, Beta- | | 10 | 500 |

— 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.