Description

2,7-Naphthalenedisulfonic Acid, 4-Amino-3,6-Bis5-(2,3-Dibromo-1-Oxopropyl)Amino-2-Sulfophenylazo-5-Hydroxy-, Potassium Sodium Salt is a high-purity, complex azo dye intermediate with significant commercial importance. This compound is valued for its ability to impart specific color properties and functional characteristics in advanced material formulations. It is primarily sought by manufacturers in the textile, specialty ink, and high-performance pigment industries for producing vivid and stable colorants.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-quality reactive dyes for cotton and other cellulosic fibers, offering excellent wash and light fastness.
• Specialty Pigment Manufacturing: Used in the production of complex organic pigments for applications requiring high color strength and durability, such as in plastics and coatings.
• Functional Dye Synthesis: Serves as a precursor for dyes used in specialized applications, including ink-jet inks and photographic materials.
• Research & Development: Employed in chemical R&D for developing novel chromophores and studying structure-property relationships in dye chemistry.
• Analytical Chemistry: Can be utilized as a standard or reagent in analytical methods for dye identification and quantification.

Basic Information

Product Name	2,7-Naphthalenedisulfonic Acid, 4-Amino-3,6-Bis5-(2,3-Dibromo-1-Oxopropyl)Amino-2-Sulfophenylazo-5-Hydroxy-, Potassium Sodium Salt
CAS No.	116912-35-7
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Reactive Black 31; Potassium sodium 4-amino-3,6-bis[5-[(2,3-dibromopropanoyl)amino]-2-sulfophenyl]azo-5-hydroxy-2,7-naphthalenedisulfonate; Reactive Black 31; 4-Amino-3,6-bis[5-[(2,3-dibromopropanoyl)amino]-2-sulfophenyl]azo-5-hydroxy-2,7-naphthalenedisulfonic Acid Potassium Sodium Salt; C.I. 182310
EINECS	Contact for details

Quality Control

Our production of 2,7-Naphthalenedisulfonic Acid, 4-Amino-3,6-Bis5-(2,3-Dibromo-1-Oxopropyl)Amino-2-Sulfophenylazo-5-Hydroxy-, Potassium Sodium Salt adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and meet precise customer specifications. Certificates of Analysis (COA) documenting all critical parameters are provided as standard.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area. Due to its hygroscopic nature, the container must be kept tightly sealed after opening to minimize exposure to atmospheric moisture. Recommended storage temperature is 15-25°C.

Specification

Item	Specification
Appearance	Dark powder or solid
Identification (IR)	Conforms
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Heavy Metals (as Pb)	Max. 20 ppm
Solubility (in Water)	Partially soluble

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