This standard describes a basis for categorizing a gas mixture as flammable or nonflammable for transportation
marking and labeling. A mixture can contain components that are not gases but the mixture shall be a gas. This
standard applies to all users, shippers, transporters, and manufacturers affected by transportation labeling and
classification requirements for gas mixtures that contain flammable component(s).
Oxidizing components and the oxidizing potential of mixtures are not covered in this standard. Classification of
gas mixtures containing flammable and oxidizing gas is outside the scope of this standard.