Page history

DavidB4-bot

→‎External links: clean up & uniformity

Wuhao1911

Undo revision 748367 by JoeForest (Talk)

JoeForest

Replaced content with 'Page corrected by Anon Category:Chemistry'

Aschlafly

wikify

NathanG

no edit summary

Philip J. Rayment

Class I Substance moved to Class I substance: Conform to revised MoS

HelpJazz

clean up

Jallen

no edit summary

Aschlafly

New page: A Class I Substance is one of several groups of chemicals given an ozone-depletion potential of 0.2 or higher by the EPA. Class I substances listed in the CAA include CFCs...