StacksVerified U.S. regulatory reference

40 CFR Part 82, Appendix E

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov
End-useSubstituteDecisionComments
All refrigeration and air-conditioning end usesMT-31UnacceptableChemical contained in this blend presents unacceptable toxicity risk.

[64 FR 3865, Jan. 26, 1999]