Description

8-Hydroxy-7-[4-[m-[2-(Sodiooxysulfonyloxy)Ethylsulfonyl]Phenylazo]-2-Methoxy-5-Methylphenylazo]-1,3,6-Naphthalenetrisulfonic Acid Trisodium Salt is a high-purity, water-soluble anionic dye intermediate of significant commercial importance. This compound is valued for its ability to impart bright and stable color properties, making it a critical component in advanced dye synthesis. It is primarily utilized by manufacturers in the textile, ink, and specialty chemical industries seeking reliable and consistent performance in their formulations.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-quality reactive dyes, particularly for cotton and other cellulosic fibers.
• Textile Dyeing and Printing: Used in formulations for textile applications requiring excellent wash-fastness and light-fastness properties.
• Ink Manufacturing: Serves as a colorant precursor in the production of inks for various printing applications.
• Specialty Chemical Synthesis: Employed in research and development for creating novel colored polymers and functional materials.
• Paper Coloring: Potential use in the manufacture of dyes for coloring paper products.
• Biological Staining: May find application as a staining agent in histological and cytological preparations due to its chromophoric structure.

Basic Information

Product Name	8-Hydroxy-7-[4-[m-[2-(Sodiooxysulfonyloxy)Ethylsulfonyl]Phenylazo]-2-Methoxy-5-Methylphenylazo]-1,3,6-Naphthalenetrisulfonic Acid Trisodium Salt
CAS No.	75722-25-7
Molecular Formula	C28H21N5Na3O19S6
Molecular Weight	~1008.9 g/mol (Contact for exact details)
Synonyms	Reactive Black 5 Precursor; Trisodium 8-hydroxy-7-[[4-[[3-[(2-sulfonatooxyethyl)sulfonyl]phenyl]azo]-2-methoxy-5-methylphenyl]azo]naphthalene-1,3,6-trisulfonate; C.I. Reactive Black 5 Intermediate; Azo Dye Intermediate 75722-25-7; 1,3,6-Naphthalenetrisulfonic Acid derivative; Vinylsulfone Reactive Dye Intermediate; Remazol Black B Intermediate
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and high purity. Every lot undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation. Certificates of Analysis (COA) detailing specific test results are provided with each shipment to support your quality assurance processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); ensure the container is sealed after each use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
pH (1% Solution)	6.0 - 8.0

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.