CI 75810

CI 75810, commonly known as indigo, is a natural blue colorant derived from the indigo plant (Indigofera tinctoria). It has been used in textile and cosmetic applications for centuries. In skincare, it functions primarily as a cosmetic colorant to provide blue pigmentation to products.Beyond its colouring function, indigo has been studied for potential deodorant properties, though its use in skincare formulations remains relatively niche. It is typically incorporated at very low concentrations and is found in fewer than 1% of skincare products on the market.

As a colorant, CI 75810 works by absorbing and reflecting light to produce a blue hue in the final product. The mechanism behind any antimicrobial or deodorant action is less well characterised in contemporary skincare research, though indigo's traditional use in folk medicine suggests possible bioactive properties.

Since indigo is used mainly for cosmetic colouring rather than active treatment, usage follows standard product instructions. Simply incorporate the product into your routine as directed. Because indigo is used at very low concentrations, it is unlikely to be a primary active ingredient in most formulations.

Indigo is generally well tolerated and has a long history of use in cosmetics. However, those with known sensitivity to plant-derived dyes or indigo itself should patch test before full application.