MEK

For MEK, cas no. is 78-93-3; cercla rq (lbs) is 5000; rcra waste number is U159; regulatory categories is 4, verified against its source on 2026-08-05.

Substance: MEK verified
CAS No.: 78-93-3 verified
CERCLA RQ (lbs): 5000 verified
RCRA waste number: U159 verified
Regulatory categories: 4 verified

Sourceecfr.gov

Verified2026-08-05

Review by2027-08-05

DatasetUS federal chemical regulatory reporting thresholds by program (CERCLA, EPCRA, CAA)

What the source says

MEK | 78-93-3 | 4 | U159 | 5000 (2270)

— ecfr.gov, retrieved 2026-08-05

Source

ecfr.govhttps://www.ecfr.gov/current/title-40/chapter-I/subchapter-J/part-302/section-302.4

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