Description

2,7-Naphthalenedisulfonic acid, 5-4-chloro-6-3-8-4-fluoro-6-(methylphenylamino)-1,3,5-triazin-2-ylamino-1-hydroxy-3,6-disulfo-2-naphthalenylazo-4-sulfophenylamino-1,3,5-triazin-2-ylamino-4-hydroxy-3-(1-sulfo-2-naphthalenyl)azo-, sodium salt is a high-purity, complex synthetic dye intermediate designed for demanding industrial applications. This compound is valued for its ability to impart specific color properties and functional characteristics in advanced material formulations. It is primarily utilized by manufacturers in the textile, specialty ink, and advanced polymer industries seeking consistent and reliable performance.

Application

• Textile Dyeing: As a key intermediate for synthesizing high-grade, wash-fast reactive and direct dyes for natural and synthetic fibers.
• Specialty Inks: Formulation of high-performance inks for digital textile printing, security printing, and other niche applications requiring precise color characteristics.
• Functional Polymers: Incorporation into polymers and coatings where specific chromophoric or light-absorbing properties are required.
• Research & Development: Serving as a critical building block in chemical R&D for developing novel colorants and functional materials.
• Analytical Chemistry: Potential use as a reagent or standard in chromatographic and spectroscopic analysis methods.

Basic Information

Product Name	2,7-Naphthalenedisulfonic acid, 5-4-chloro-6-3-8-4-fluoro-6-(methylphenylamino)-1,3,5-triazin-2-ylamino-1-hydroxy-3,6-disulfo-2-naphthalenylazo-4-sulfophenylamino-1,3,5-triazin-2-ylamino-4-hydroxy-3-(1-sulfo-2-naphthalenyl)azo-, sodium salt
CAS No.	155522-05-7
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Reactive Black 31; Reactive Black 31; Sodium 5-[[4-chloro-6-[[3-[[8-[[4-fluoro-6-(methylphenylamino)-1,3,5-triazin-2-yl]amino]-1-hydroxy-3,6-disulfo-2-naphthyl]azo]-4-sulfophenyl]amino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[(1-sulfo-2-naphthyl)azo]-2,7-naphthalenedisulfonate; Reactive Black B; 155522-05-7; Reactive Dye Black 31
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 purity. Every lot undergoes comprehensive analytical testing, including HPLC for assay and impurity profiling and spectroscopic identification (IR/UV-Vis). A detailed Certificate of Analysis (COA) documenting all relevant specifications is 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 a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Dark powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 90% (Typical 92-97%)
Moisture Content	≤ 5.0%
Solubility (in Water)	Completely soluble
Heavy Metals (as Pb)	≤ 20 ppm

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