NINGBO INNO PHARMCHEM CO.,LTD. is dedicated to providing detailed insights into the chemical compounds we offer, including Direct Black 17 (CAS 2945-96-2). This dye is a cornerstone in many textile dyeing processes, and understanding its chemical backbone is key to appreciating its performance. The molecular formula of Direct Black 17 is C24H21N6NaO5S, with a molecular weight of approximately 528.52 g/mol. This structure, rich in azo groups (-N=N-), is characteristic of many direct dyes and is responsible for its ability to impart color to fibers.

As a direct dye, Direct Black 17 has a high affinity for cellulosic fibers, such as cotton, linen, and rayon. This substantivity is due to hydrogen bonding and van der Waals forces between the dye molecule and the hydroxyl groups on the cellulose polymer chains. This direct interaction means that the dye can be applied from an aqueous bath, typically with the addition of electrolytes like sodium chloride or sodium sulfate, which help to promote dye aggregation and increase exhaustion onto the fiber. The efficiency of cellulose fiber dyeing with Direct Black 17 is a significant advantage for manufacturers.

The physical appearance of Direct Black 17 is typically a grey powder, which dissolves in water to form a violet-black solution. Its solubility and dyeing behavior are influenced by factors such as temperature and pH. The dye also exhibits good light fastness and wash fastness, although these properties can vary depending on the specific application conditions and aftertreatments. Its versatility is further highlighted by its successful application in dyeing silk, nylon, and blended fabrics, where it interacts with the functional groups present in these fibers.

The chemical properties of Direct Black 17 also make it suitable for certain printing applications, where controlled application of color is required. NINGBO INNO PHARMCHEM CO.,LTD. ensures that our product meets strict quality controls to guarantee consistent particle size, purity, and dyeing performance. Understanding the nuances of textile dyeing chemistry is vital for optimizing results.

It is crucial for all users to consult the Material Safety Data Sheet (MSDS) provided by NINGBO INNO PHARMCHEM CO.,LTD. for Direct Black 17. This document provides essential information regarding safe handling, storage, and potential hazards, including the presence of any restricted aromatic amines. Our commitment is to provide not only effective chemical products but also the necessary information for their safe and responsible use.

In conclusion, the chemical properties of Direct Black 17 (CAS 2945-96-2) underpin its wide-ranging utility in the textile industry. NINGBO INNO PHARMCHEM CO.,LTD. is proud to supply this key dye, supporting the production of high-quality colored textiles while emphasizing safety and technical understanding.