Article last updated: October 15, 2024
Hc Yellow No. 11, also known by its chemical name 1-(.beta.-hydroxyethyl)amino-2-hydroxy-4-nitrobenzene, is a synthetic dye primarily used in hair dyeing products. This vibrant yellow compound is part of a broader category of colorants that are specifically formulated to impart color to hair. It’s worth noting that Hc Yellow No. 11 is not a natural ingredient; it is synthesized through a series of chemical reactions involving nitrobenzene derivatives.
The history of Hc Yellow No. 11 in cosmetics dates back to the mid-20th century when the demand for more vibrant and varied hair colors began to rise. As consumers sought more options beyond the traditional black, brown, and blonde, chemists started to develop a range of synthetic dyes to meet this growing need. Hc Yellow No. 11 emerged as a popular choice due to its stability and effectiveness in providing a bright yellow hue that could be mixed with other dyes to create a spectrum of colors.
The production of Hc Yellow No. 11 involves a multi-step chemical process. Initially, nitrobenzene is subjected to a series of reactions, including nitration and reduction, to introduce the necessary functional groups. The resulting compound is then further reacted with ethylene oxide to introduce the hydroxyethyl group, culminating in the final product. This meticulous process ensures that the dye is both effective and safe for use in cosmetic formulations.
In this section, we will delve into the officially recognized cosmetic benefits and uses of Hc Yellow No. 11:
Hc Yellow No. 11 is primarily used as a hair dye ingredient. This means it is specifically formulated to impart color to the hair. When included in hair dye products, Hc Yellow No. 11 helps achieve a particular shade or tone, contributing to the overall color result. Whether you’re looking to cover grays, enhance your natural hair color, or experiment with a new look, this ingredient plays a crucial role in the dyeing process.
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).
Regarding individuals who are pregnant or breastfeeding, data and research on the topical usage of Hc Yellow No. 11 during pregnancy and breastfeeding are lacking. Therefore, it is advisable for these individuals to consult a healthcare professional for further advice.
While Hc Yellow No. 11 is generally considered safe for use in hair dyeing products, there are potential side effects associated with its topical application. These may include:
Adverse reactions to Hc Yellow No. 11 are relatively 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.
On a comedogenicity scale of 0 to 5, Hc Yellow No. 11 is rated as 0, meaning it is non-comedogenic. This indicates that it is unlikely to clog pores or contribute to acne, making it suitable for individuals prone to blemishes or breakouts.
