G3 - Gas, Non-flammable. Any product (includes compressed gas, liquefied gas, pressurized cryogenic gas and
compressed gas in solution) which is required to be shipped as UN Class 2.2 under 49 CFR 173.115 (b). This
means a "non-flammable, non-poisonous compressed gas" material (or mixture) which:
(a) Exerts in the packaging a pressure of 41 psia (280 kPa) or higher at 20oC (68oF), and
(b) Does not meet the definition of a Flammable Gas (HCC G2), a Poison Gas (HCC G1), a Corrosive Gas (HCC
G5), or an Oxidizing Gas (HCC G4).
G4 - Gas, Nonflammable, Oxidizer. A Nonflammable Gas, Oxidizer is a material (or mixture) which:
(a) Meets the definition of a Nonflammable Gas (HCC G3), except is an oxidizer; and
(b) Does not meet the definition of Poison Gas (HCC G1) or Flammable Gas (HCC G2); and
(c) Requires an Oxidizer label and a Nonflammable Gas label for transportation under 49 CFR.
G5 - Gas, Nonflammable, Corrosive. A Nonflammable Gas, Corrosive is a material (or mixture) which:
(a) Meets the definition of a Nonflammable Gas (HCC G3), except it is corrosive; and
(b) Does not meet the definition of Poison Gas (HCC G1) or Flammable Gas (HCC G2); and
(c) Requires a Corrosive label and a Nonflammable Gas label for transportation under 49 CFR.
G6 - Gas, Poison, Corrosive (Nonflammable). A Gas, Poison, Corrosive, (Nonflammable) is a material (or
mixture) which:
(a) Meets the definition of a Nonflammable Gas (HCC G3), except it is poisonous and corrosive; and
(b) Does not meet the definition of a Flammable Gas (HCC G2) or an Oxidizing Gas (HCC G4); and
(c) Meets the definition of a Poison Gas (HCC G1); and
(d) Requires a Corrosive label and a Poison Gas label for transportation under 49 CFR.
G7 - Gas, Poison, Oxidizer (Nonflammable). A Gas, Poison, Oxidizer (Nonflammable) is a material (or
mixture) which:
(a) Meets the definition of a Nonflammable Gas (HCC G3), except it is oxidizing and poisonous; and
(b) Does not meet the definition of a Flammable Gas (HCC G2) or a Corrosive Gas (HCC G5); and
B-8
