Article last updated: October 15, 2024
Hc Blue No. 8, also known by its chemical name 1-[(3-aminopropyl)amino]-4-(methylamino)anthraquinone hydrochloride, is a synthetic dye primarily used in hair coloring products. This vibrant blue dye is part of the anthraquinone family, a group of compounds known for their vivid colors and stability. The “Hc” in its name stands for “Hair Colorant,” indicating its primary function in the cosmetic industry.
The history of Hc Blue No. 8 in cosmetics dates back to the mid-20th century when synthetic dyes began to replace natural dyes due to their consistency, longevity, and broader range of colors. Over the years, it has become a staple in the formulation of semi-permanent and permanent hair dyes, thanks to its ability to impart a rich, long-lasting blue hue to hair.
The production of Hc Blue No. 8 involves a series of chemical reactions starting with anthraquinone, a naturally occurring compound found in some plants and fungi. Through a process of amination and methylation, the anthraquinone is modified to produce the desired blue dye. The final product is then converted into its hydrochloride salt form to enhance its solubility and stability, making it easier to incorporate into hair dye formulations.
In this section, we will delve into the officially recognized cosmetic benefits and uses of Hc Blue No. 8:
Hc Blue No. 8 is primarily used as a hair dye. This means that its main function is to impart color to the hair. Whether you’re looking to achieve a bold, vibrant blue hue or a more subtle tint, Hc Blue No. 8 is the ingredient that makes it possible. It works by penetrating the hair shaft and depositing color, which can either enhance your natural hair color or completely transform it, depending on the formulation and concentration used.
Note: the listed benefits above are exclusively based on the officially recognized and defined functions of the ingredient, as documented by the International Nomenclature of Cosmetic Ingredients (INCI).
When considering the use of Hc Blue No. 8 in cosmetic products, it is important to be aware of its safety, suitability, and allergenic potential. While this ingredient is primarily used for hair dyeing, it can have some side effects when applied topically.
Regarding individuals who are pregnant or breastfeeding, data and research on the topical usage of Hc Blue No. 8 during pregnancy are lacking. Therefore, it is advisable for pregnant or breastfeeding women to consult a healthcare professional for further advice before using products containing this ingredient.
Side effects and adverse reactions from Hc Blue No. 8 are generally uncommon, but they can occur. It is recommended to perform a patch test before widespread usage to ensure there are no adverse reactions.
In terms of comedogenicity, Hc Blue No. 8 has a rating of 0, meaning it is considered totally non-comedogenic. This is beneficial for individuals who are prone to acne, blemishes, or breakouts, as it is unlikely to clog pores or exacerbate these conditions.
