Description

Trisodium 7-Hydroxy-8-[[4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Naphthalene-1,3-Disulphonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. This compound is valued for its ability to impart a strong, stable color and its compatibility with various industrial processes. It is primarily sought after by manufacturers in the textile, ink, and specialty chemical sectors for the synthesis of reactive and direct dyes.

Application

• Primary Intermediate for Dye Synthesis: A key building block for manufacturing reactive, direct, and acid dyes, particularly for coloring cotton, wool, and nylon.
• Textile Industry: Used in the production of dyes for fabric dyeing and printing processes, offering good wash and light fastness.
• Ink Manufacturing: Serves as a colorant precursor in the formulation of inks for packaging, publishing, and specialty printing.
• Paper Coloring: Employed in the production of dyes for tinting paper and paper products.
• Leather Dyeing: Utilized in the synthesis of dyes for coloring leather goods.
• Biological Staining: Potential use as an intermediate for histochemical stains and indicators in laboratory settings.
• Research & Development: Serves as a standard or starting material in chemical research for developing new chromophores and functional materials.

Basic Information

Item	Details
Product Name	Trisodium 7-Hydroxy-8-[[4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Naphthalene-1,3-Disulphonate
CAS No.	7401-69-6
Molecular Formula	C22H12N4Na3O10S3
Molecular Weight	665.51 g/mol
Synonyms	Acid Black 24; C.I. 26370; 7-Hydroxy-8-((4-((4-sulfophenyl)azo)phenyl)azo)naphthalene-1,3-disulfonic acid trisodium salt; Trisodium 8-[(4-[(4-sulfonatophenyl)diazenyl]phenyl)diazenyl]-7-hydroxynaphthalene-1,3-disulfonate; Naphthalene Black 12B; Pontacyl Blue Black SX
EINECS	Contact for details

Quality Control

Our production of Trisodium 7-Hydroxy-8-[[4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Naphthalene-1,3-Disulphonate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with customer specifications. Certificates of Analysis (COA) documenting all critical parameters are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture which may affect product performance.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Water Content (KF)	Max. 5.0%
pH (1% Solution)	7.0 - 9.0
Heavy Metals (as Pb)	Max. 20 ppm
Sulfated Ash	Contact for details

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