The Aerosol Dispensers Regulations 2009 No. 2824

[F1 SCHEDULE 1A E+W+S (Annex to the Directive)

Textual Amendments

F1 Sch. 1A inserted (E.W.S.) (31.12.2020) by The Product Safety and Metrology etc. (Amendment etc.) (EU Exit) Regulations 2019 (S.I. 2019/696), reg. 1, Sch. 13 para. 8 (with reg. 2 as amended by S.I. 2020/676, regs. 1(1), 2); 2020 c. 1, Sch. 5 para. 1(1)

Chemical Heat of Combustion E+W+S

1.10.   The chemical heat of combustion ΔH_c shall be either determined by:

(a) acknowledged rules of technology, described e.g. in standards such as ASTM D 240, ISO 13943 86.1 to 86.3 and NFPA 30B, or found in the scientifically established literature; or

(b) applying the following calculation method:

The chemical heat of combustion (ΔH_c), in kilojoules per gram (kJ/g), can be calculated as the product of the theoretical heat of combustion (ΔH_comb), and a combustion efficiency, usually less than 1,0 (a typical combustion efficiency is 0,95 or 95%).

For a composite aerosol formulation, the chemical heat of combustion is the summation of the weighted heats of combustion for the individual components, as follows:

where:

• ΔHc = chemical heat of combustion (kJ/g) of the product;

• w_i% = mass fraction of component i in the product;

• ΔH_c(i) = specific heat of combustion (kJ/g) of component i in the product.

The person responsible for the marketing of the aerosol dispenser has to describe the method used for determining the chemical heat of combustion in a document to be made readily available in English at the address specified on the label in accordance with regulation 3(8)(a)(i), if the chemical heat of combustion is used as a parameter for assessing the flammability of aerosols, according to the provisions of these Regulations.]