# The Explosives (Hazard Information and Packaging for Supply) Regulations (Northern Ireland) 2009, Paragraph 2.2: Gaseous preparations

Extent: N.I.

For gases that produce non-lethal irreversible effects after a single exposure (R39/route of exposure, R68/route of exposure), the individual concentration limits specified in Table IIA, expressed as a volume/volume percentage, determine, when appropriate, the classification of the preparation.
Table IIA
Classification of the substance (gas)
Classification of the preparation
T+
T
Xn
(*)In order to indicate the route of administration/exposure the combined R phrases listed in Annex III of Council Directive 67/548/EEC shall be used.
(†)R68 here refers to substances classified as harmful. Concentration limits for substances required to be labelled R68 but classified mutagenic are given in Table VI.
T+ with R39/ route of exposure
concentration ≥ 1% R39 obligatory
0.2% ≤ concentration < 1% R39 obligatory
0.02% ≤ concentration < 0.2% R68 obligatory
T with R39/ route of exposure
concentration ≥ 5% R39 obligatory
0.5% ≤ concentration < 5% R68 obligatory
Xn with R68/ route of exposure
concentration ≥ 5% R68 obligatory

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Source: https://www.legislation.gov.uk/nisr/2009/273/schedule/3/paragraph/2.2 (the official version)
Page: https://openlegislation.uk/explosives-hazard-information-and-packaging-for-supply-regulations-northern-ireland-2009/schedule-3/paragraph-2.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.