# The Russia (Sanctions) (EU Exit) Regulations 2019, Paragraph 2: CAS numbers


(1) For the purposes of this Schedule “CAS Number” when followed by a numerical sequence is a reference to the CAS Registry Numbers assigned to chemicals by the Chemical Abstracts Service.
(2) But regulation 53A applies to chemicals of the same structural formula (including hydrates) regardless of name or CAS Number.

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Source: https://www.legislation.gov.uk/uksi/2019/855/schedule/3C/part/1/paragraph/2 (the official version)
Page: https://openlegislation.uk/russia-sanctions-eu-exit-regulations-2019/schedule-3C/part-1/paragraph-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.