# The Good Laboratory Practice Regulations 1999, Paragraph 4


Chemicals, reagents and solutions should be labelled to indicate identity (with concentration if appropriate), expiry date and specific storage instructions. Information concerning source, preparation date and stability should be available. The expiry date may be extended on the basis of documented evaluation or analysis.

---
Source: https://www.legislation.gov.uk/uksi/1999/3106/schedule/1/part/IV/paragraph/4 (the official version)
Page: https://openlegislation.uk/good-laboratory-practice-regulations-1999/schedule-1/part-IV/paragraph-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.