The creation of effective and visually appealing hair dyes is a precise science, heavily reliant on the careful selection and application of various chemical components. Among these, chemical intermediates play a pivotal role, acting as foundational elements that determine the final color characteristics, longevity, and safety of the product. Understanding these intermediates, such as 4-amino-3-nitrophenol hydrochloride, is crucial for successful hair dye formulation.

4-Amino-3-nitrophenol hydrochloride, identified by its chemical name 2-[4-amino-N-(2-hydroxyethyl)-3-nitroanilino]ethanol, hydrochloride, and CAS number 94158-13-1, is a key intermediate in the hair dye industry. Its molecular formula, C10H16ClN3O4, precisely describes its composition. As a yellow crystalline powder, its high purity (≥99.0% by HPLC) and minimal impurity levels (e.g., Ash ≤1.0%, Loss on drying ≤1.0%) are critical quality indicators. These specifications ensure that the intermediate will perform predictably within the complex matrix of a hair dye formulation.

The primary function of this compound in hair dyes is as a toner. It contributes specific color tones and vibrancy by participating in oxidative coupling reactions that permanently alter the hair's pigment. This makes it an indispensable ingredient for achieving a wide spectrum of hair colors. Manufacturers aiming to buy 4-amino-3-nitrophenol hydrochloride need to ensure they source from reliable suppliers of hair dye intermediates who can guarantee these stringent purity standards.

The hair dye formulation concentration of such intermediates is carefully determined through extensive research and safety assessments. Regulatory bodies, such as those in the EU, provide guidelines on maximum permitted concentrations for ingredients like 4-amino-3-nitrophenol (e.g., 1.5% after dilution). This focus on safety ensures that products are not only effective but also meet stringent health and environmental standards. Understanding these regulations is vital for any company looking to purchase 4-amino-3-nitrophenol hydrochloride for commercial use.

The market for these specialized chemicals involves competitive pricing, but manufacturers must prioritize quality and reliability. Companies like NINGBO INNO PHARMCHEM CO.,LTD. are important players in the supply chain, providing essential hair dye raw materials. When evaluating suppliers, it is beneficial to compare not only the price of 4-amino-3-nitrophenol hydrochloride but also their commitment to quality control, regulatory compliance, and customer support. Obtaining samples and reviewing Certificates of Analysis are standard practices to verify product suitability.

In conclusion, the successful formulation of hair dyes hinges on the precise use of high-quality chemical intermediates. 4-Amino-3-nitrophenol hydrochloride exemplifies the critical role these compounds play, from defining color palettes to ensuring product safety. By focusing on scientific understanding, reliable sourcing, and regulatory adherence, the industry continues to innovate and deliver exceptional hair coloring experiences.