# Commission Regulation (EU) No 544/2011 of 10 June 2011 implementing Regulation (EC) No 1107/2009 of the European Parliament and of the Council as regards the data requirements for active substances (Text with EEA relevance) (repealed), Division 2.5.1

Extent: E+W+S+N.I.

The following spectra including a table of signal characteristica needed for interpretation must be determined and reported: Ultraviolet/Visible (UV/VIS), infrared (R), nuclear magnetic resonance (NMR), and mass spectra (MS) of purified active substance and molecular extinction at relevant wavelengths, must be determined and reported.
The wavelengths at which UV/visible molecular extinction occurs are to be determined and reported and must include where appropriate a wavelength at the highest absorption value above 290 nm.
In the case of active substances which are resolved optical isomers their optical purity must be measured and reported.

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Source: https://www.legislation.gov.uk/eur/2011/544/annex/part/A/division/2/division/2.5/division/2.5.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2011-544/annex/part-A/division-2/division-2.5/division-2.5.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.