Sulfur trioxide

For Sulfur trioxide, cas no. is 7446-11-9; epa rmp tq (lbs) is 10,000; rmp category is toxic; rmp basis for listing is a, b, recorded from its source on 2026-08-15.

Substance: Sulfur trioxide verified
CAS No.: 7446-11-9 verified
EPA RMP TQ (lbs): 10,000 verified
RMP category: toxic our reading
RMP basis for listing: a, b verified

Sourceecfr.gov

Verified2026-08-15

Review by2027-08-15

DatasetOSHA PSM vs EPA RMP: chemical threshold quantities side by side

Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.

What the source says

Sulfur trioxide | 7446-11-9 | 10,000 | a, b

— ecfr.gov, retrieved 2026-08-15

Source

ecfr.govhttps://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130

Last verified against source: 2026-08-15. Due for re-check by 2027-08-15. This page as Markdown · OKF bundle · full dataset as JSON.