Description

2,7-Naphthalenedisulfonic acid, 4-hydroxy-5-[[4-[[4-[[5-hydroxy-6-[(2-methoxy-5-sulfophenyl)azo]-7-sulfo-2-naphthalenyl]amino]-6-(phenylamino)-1,3,5-triazin-2-yl]amino]-5-methoxy-2-methylphenyl]azo]-, tetrasodium salt is a high-purity, complex azo dye intermediate of significant industrial importance. This compound is valued for its ability to impart specific, vibrant color properties and excellent fastness characteristics in demanding applications. It is primarily utilized by manufacturers in the textile, ink, and specialty coatings industries seeking reliable and consistent performance. Our supply ensures a high-quality, commercially available source for this critical chemical building block.

Application

• Textile Dyeing: As a key intermediate for synthesizing reactive and direct dyes for cotton, wool, and nylon, offering excellent wash and light fastness.
• Ink Manufacturing: Used in the production of high-performance inks for packaging, security printing, and digital textiles.
• Specialty Coatings: Imparts color and functional properties in coatings for plastics, paper, and leather goods.
• Research & Development: Serves as a critical reagent in chemical research for developing new chromophores and functional dyes.
• Functional Dyes: Potential use in the synthesis of dyes for non-textile applications, such as in optical data storage or laser dyes.

Basic Information

Product Name	2,7-Naphthalenedisulfonic acid, 4-hydroxy-5-[[4-[[4-[[5-hydroxy-6-[(2-methoxy-5-sulfophenyl)azo]-7-sulfo-2-naphthalenyl]amino]-6-(phenylamino)-1,3,5-triazin-2-yl]amino]-5-methoxy-2-methylphenyl]azo]-, tetrasodium salt
CAS No.	70236-51-0
Molecular Formula	C44H30N10Na4O19S6
Molecular Weight	Approx. 1300.0 g/mol (Contact for details)
Synonyms	Reactive Black 5 (Tetrasodium Salt); C.I. Reactive Black 5; Remazol Black B; Tetrasodium 4-amino-5-hydroxy-3,6-bis((4-((2-(sulfonatooxy)ethyl)sulfonyl)phenyl)azo)naphthalene-2,7-disulfonate (related isomer); 4-Hydroxy-5-({4-[(4-{[5-hydroxy-6-(2-methoxy-5-sulfophenyl)diazenyl]-7-sulfo-2-naphthyl}amino)-6-(phenylamino)-1,3,5-triazin-2-yl]amino}-5-methoxy-2-methylphenyl)diazenyl-2,7-naphthalenedisulfonic acid tetrasodium salt; Azo Dye Intermediate 70236-51-0; Complex Azo Dye Salt.
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to strict quality control protocols to ensure batch-to-batch consistency and purity for industrial applications. Quality is verified through comprehensive analytical testing including HPLC for purity, spectrophotometry for color strength, and wet chemical analysis. A Certificate of Analysis (COA) detailing assay, impurity profile, and physical specifications is provided with each shipment to guarantee it meets your technical requirements.

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). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product performance and handling.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 90%
Color Strength	95 - 105% (vs. Standard)
Moisture (KF Titration)	Max. 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	Max. 20 ppm

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