Description

1,5-Naphthalenedisulfonic Acid, 3-4-4,6-Bis(3-Sulfopropyl)Thio-1,3,5-Triazin-2-Ylamino-5-Methoxy-2-Methylphenylazo-, Tetrasodium Salt is a high-purity, water-soluble anionic dye intermediate and functional chemical. This compound is engineered for exceptional color strength and stability, making it a critical component in advanced dye synthesis. It is primarily required by manufacturers in the textile, ink, and specialty polymer industries seeking reliable, high-performance chromophores and functional additives.

Application

• Textile Dye Intermediate: A key precursor for synthesizing reactive and acid dyes, particularly for dyeing polyamide (nylon) and protein-based fibers like wool and silk.
• Inkjet Ink Formulation: Used in the production of high-quality colorants for industrial and commercial inkjet printing, offering excellent water solubility and color fidelity.
• Functional Polymer Additive: Incorporated into polymers to impart specific ionic characteristics or as a monomer for creating dyes with polymerizable groups.
• Paper Coloring: Serves as a colorant in specialty paper coatings and high-grade writing/printing papers.
• Biological Staining: Potential use in the development of histological stains and diagnostic reagents due to its specific chromophoric structure.
• Liquid Crystal Display (LCD) Color Filters: Can be investigated as a dye for color filters in display technologies, given its thermal and photostability.

Basic Information

Product Name	1,5-Naphthalenedisulfonic Acid, 3-4-4,6-Bis(3-Sulfopropyl)Thio-1,3,5-Triazin-2-Ylamino-5-Methoxy-2-Methylphenylazo-, Tetrasodium Salt
CAS No.	187674-70-0
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Tetrasodium 3-[[4,6-bis(3-sulfopropylthio)-1,3,5-triazin-2-yl]amino]-5-methoxy-2-methyl-4-[(1,5-disulfonaphthalen-2-yl)azo]benzenesulfonate; C.I. Reactive Black 31; Reactive Black 31; Reactive Dye Black 31; 1,5-Naphthalenedisulfonic acid, 3-[[4,6-bis(3-sulfopropylthio)-1,3,5-triazin-2-yl]amino]-5-methoxy-2-methyl-4-[(1,5-disulfo-2-naphthalenyl)azo]-, tetrasodium salt; Black 31 Reactive Dye
EINECS	Contact for details

Quality Control

Our production of 1,5-Naphthalenedisulfonic Acid, 3-4-4,6-Bis(3-Sulfopropyl)Thio-1,3,5-Triazin-2-Ylamino-5-Methoxy-2-Methylphenylazo-, Tetrasodium Salt adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing to ensure consistent purity, color value, and chemical composition. Certificates of Analysis (COA) detailing assay, impurity profile, and physical specifications are provided to guarantee compliance with your technical requirements and support your own 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 material is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, 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%
Water Content	Max. 5.0%
pH (1% Solution)	6.0 - 8.0
Solubility in Water	Completely 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.