aerosols
aerosols (un no. 1950) are assigned to one of the following groups according to their hazardous properties, as follows:
a asphyxiant;
o oxidizing;
f flammable;
t toxic;
c corrosive;
co corrosive, oxidizing;
fc flammable, corrosive;
tf toxic, flammable;
tc toxic, corrosive;
to toxic, oxidizing;
tfc toxic, flammable, corrosive; toc toxic, oxidizing, corrosive.
the classification depends on the nature of the contents of the aerosol dispenser.
note: gases, which meet the definition of toxic gases according to 2.2.2.1.5 and gases identified as "considered as pyrophoric" by table note c of table 2 of packing instruction p200 in 4.1.4.1, shall not be used as a propellant in an aerosol dispenser. aerosols with contents meeting the criteria for packing group i for toxicity or corrosivity shall not be accepted for carriage (see also 2.2.2.2.2).
the following criteria shall apply:
(a) assignment to group a shall apply when the contents do not meet the criteria for any other group according to sub-paragraphs (b) to (f) below;
(b) assignment to group o shall apply when the aerosol contains an oxidizing gas according to 2.2.2.1.5;
(c) assignment to group f shall apply if the contents include 85% by mass or more flammable components and the chemical heat of combustion is 30 kj/g or more.
it shall not apply if the contents contain 1% by mass or less flammable components and the heat of combustion is less than 20 kj/g.
otherwise the aerosol shall be tested for flammability in accordance with the tests described in the manual of tests and criteria, part iii, section 31. extremely flammable and flammable aerosols shall be assigned to group f;
note: flammable components are flammable liquids, flammable solids or flammable gases and gas mixtures as defined in notes 1 to 3 of sub-section 31.1.3 of part iii of the manual of tests and criteria. this designation does not cover pyrophoric, self-heating or water-reactive substances. the chemical heat of combustion shall be determined by one of the following methods astm d 240, iso/fdis 13943:1999 (e/f) 86.1 to 86.3 or nfpa 30b.
(d) assignment to group t shall apply when the contents, other than the propellant of aerosol dispensers to be ejected, are classified as class 6.1, packing groups ii or iii;
(e) assignment to group c shall apply when the contents, other than the propellant of aerosol dispensers to be ejected, meet the criteria for class 8, packing groups ii or iii;
(f) when the criteria for more than one group amongst groups o, f, t, and c are met, assignment to groups co, fc, tf, tc to, tfc or toc shall apply, as relevant.