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Code: AZUL3



Guaiazulene is an active ingredient used in the cosmetic and pharmaceutical industries and derived from azulene. It (and other azulene derivatives) can undergo considerable changes with a varying of the pH, and also due to photochemical sensitivity when exposed to daylight and ultra-violet light.
In an acid environment, azulene derivatives change in colour from a yellowy green to yellow. Atmospheric oxygen, like with light, leads to oxidisation of the azulene compounds and these change in colour from blue to greeny blue.
This change in colour has implications in aesthetic terms but none in terms of how effective the compounds are. For this reason, a stable dye is recommended to minimise colour changes and for the same reason we recommend using coloured glass bottles and tubes for packaging. Dosage: 0.01 – 0.05 %.

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