# The Chemicals (Hazard Information and Packaging for Supply) Regulations 1994, Paragraph 5.2: Gaseous preparations


Gases that produce such effects are classified as sensitizing and assigned:
the symbol Xn and phrase R42 if this effect can be produced by inhafilation,
the symbol Xn and phrase R 42/43 if this effect can be produced by inhalation and through contact with the skin.
The individual concentration limits specified in Table VA below, expressed as a volume/volume percentage, determine, when appropriate, the classification of the preparation.
TABLE VA
Classification of the substance (gas)
Classification of the preparation
Sensitizing with R42
Sensitizing with R43
Sensitizing with R42
concentration > 0.2% R42 obligatory
Sensitizing with R42/43
concentrationf0.2% R42/43 obligatory

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Source: https://www.legislation.gov.uk/uksi/1994/3247/schedule/3/paragraph/5.2 (the official version)
Page: https://openlegislation.uk/chemicals-hazard-information-and-packaging-for-supply-regulations-1994/schedule-3/paragraph-5.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.