Technical guides
The key terms in cosmetic science, explained properly.
Pillar pages written and checked by CSL scientists. Each one explains a standard, test or regulatory requirement in full, with tables, worked examples and the primary sources behind it.
Guires Cosmetic Science Lab
Cosmetic Science Technical Guides from Guires CSL
Our technical guides are pillar pages on the standards and regulations that decide whether a cosmetic can go to market. Each guide is written and checked by Guires CSL scientists, cites the primary regulation or ISO standard, and explains the method, the acceptance criteria and the common reasons products fail, with practical next steps for brands, formulators and regulatory teams.
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Start with the term you need.
Every mention of these terms across the site links back to its guide.
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Create your next product with CSL.
Our formulation chemists, testing scientists and regulatory specialists work alongside your team, from the first brief to a market-ready product. Bring a brief, a benchmark or just an idea: a scientist will reply within one working day with next steps and an indicative scope.