# The Chemicals (Hazard Information and Packaging for Supply) Regulations 1994, Paragraph 3.2: Gaseous preparations


For gases that produce severe effects after repeated or prolonged exposure (R48/route of exposure), the individual concentration limits specified in Table IIIA below, e⅔ xpressed as a volume/volume percentage, determine, when appropriate, the classification of the preparation.
TABLE IIIA
Classification of the substance (gas)
Classification of the preparation
T
Xn
(*) In order to indicate the route of administration/exposure the combined R phrases listed in paragraphs 44, 45 and 46 of the approved classification and labelling guide shall be used.
T + with R48/route of exposure
concentration > 5% R48 obligatory
0.5% < concentration < 5% R48 obligatory
Xn with R48/route of exposure
concentration > 5% R48 obligatory

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Source: https://www.legislation.gov.uk/uksi/1994/3247/schedule/3/paragraph/3.2 (the official version)
Page: https://openlegislation.uk/chemicals-hazard-information-and-packaging-for-supply-regulations-1994/schedule-3/paragraph-3.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.