Module 1: Regulations - International Association of Fire Fighters

Student Text IAFF Training for Hazardous Materials: Technician©
hazard but are so insensitive that there is
very little probability of initiation or of
transition from burning to detonation under
normal conditions of transport. Examples of
division 1.5 explosives include pilled ammonium
nitrate fertilizer-fuel oil mixtures
(blasting agents).
Division 1.6
Division 1.6 consists of extremely insensitive
articles that do not have a mass explosive
hazard. This division is comprised of
articles that contain only extremely insensitive
detonating substances and that demonstrate
a negligible probability of accidental
initiation or propagation.
Class 2 Gases
The materials included in Class 2 are compressed gases.
The gases are divided into three divisions. Notice that the
basic shipping description for a material in Class 2 does not
include a packing group!
Division 2.1
Division 2.2
Flammable gases are defined as “a material
which is a gas at 68°F or less and 14.7 psi
and which is ignitable at 14.7 psi when in a
mixture of 13% or less by volume with air,
or has a flammable range at 14.7 psi with
air of at least 12%, regardless of the lower
flammable limit.” An example of a basic
shipping description for a flammable gas:
Butylene, 2.1, UN 1012.
Non-flammable, non-poisonous compressed
gases are described as “a material or mixture
that has an absolute pressure of 41 psi
at 68°F and does not meet the definition of
Division 2.1 or 2.3.” An example of the
basic shipping description for a non-flammable,
non-poisonous gas is Bromotrifluoromethane,
2.2, UN 1009.
Module 1: Regulations 1-29