1,3-Butadiene

For 1,3-Butadiene, cas no. is 106-99-0; cercla rq (lbs) is 10; regulatory categories is 3, verified against its source on 2026-08-05.

What the source says

1,3-Butadiene | 106-99-0 | 3 | | 10 (4.54)

— 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.