Reference Source

4,4′-DDE

For 4,4′-DDE, cas no. is 72-55-9; cercla rq (lbs) is 1; regulatory categories is 2,4, verified against its source on 2026-08-05.

Substance
4,4′-DDE
CAS No.
72-55-9
CERCLA RQ (lbs)
1
Regulatory categories
2,4
Sourceecfr.gov
Verified2026-08-05
Review by2027-08-05
DatasetUS federal chemical regulatory reporting thresholds by program (CERCLA, EPCRA, CAA)

What the source says

4,4′-DDE | 72-55-9 | 2,4 | | 1 (0.454)

— ecfr.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 bundle · full dataset as JSON.