Article last updated: October 15, 2024
Hc Blue No. 9, also known by its chemical name 1-[(2′,3′-Dihydroxypropyl)amino]-2-nitro-4-[ethyl-(2′-hydroxyethyl)amino]benzene hydrochloride, is a synthetic compound primarily used as a hair dye ingredient in cosmetic products. This vibrant blue dye is part of a broader category of hair colorants designed to provide a range of shades and tones to hair, enhancing its appearance and allowing for creative expression.
The history of Hc Blue No. 9 in cosmetics dates back to the development of synthetic dyes in the early 20th century. As the demand for more diverse and vibrant hair colors grew, chemists began to explore various synthetic compounds that could deliver long-lasting and vivid results. Hc Blue No. 9 emerged as a popular choice due to its stability, safety profile, and ability to produce a striking blue hue.
The production of Hc Blue No. 9 involves a series of chemical reactions starting with the base compound, benzene. Through a process of nitration, amination, and subsequent reactions with ethyl and hydroxyethyl groups, the final compound is synthesized. The resulting product is then purified and converted into its hydrochloride salt form, which enhances its solubility and ease of use in cosmetic formulations.
In this section, we will delve into the officially recognized cosmetic benefits and uses of Hc Blue No. 9:
Hc Blue No. 9 is primarily used as a hair dye. This means it is an ingredient that imparts color to the hair. When included in hair dye formulations, it helps achieve a specific shade of blue, contributing to the overall color palette that a product can offer. Whether you’re looking to add a subtle blue tint or go for a bold, vibrant blue hue, Hc Blue No. 9 plays a crucial role in making that possible.
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).
Hc Blue No. 9, like many cosmetic ingredients, has been evaluated for safety and suitability in hair dyeing applications. However, it is important to be aware of potential side effects and other considerations when using products containing this ingredient.
Potential side effects of topical application of Hc Blue No. 9 include:
Regarding individuals who are pregnant or breastfeeding, data and research on the topical usage of Hc Blue No. 9 during pregnancy and breastfeeding are lacking. Therefore, it is advisable for these individuals to consult a healthcare professional for further advice before using products containing this ingredient.
Adverse reactions to Hc Blue No. 9 are generally uncommon, but they can occur. It is recommended to perform a patch test before widespread usage to ensure that you do not have an adverse reaction to the ingredient.
In terms of comedogenicity, Hc Blue No. 9 has a rating of 1 on a scale of 0 (totally non-comedogenic) to 5 (highly comedogenic). This low rating indicates that it is unlikely to clog pores or cause acne, making it suitable for individuals prone to acne, blemishes, or breakouts.
