Description

Disodium 5,5'-[(1-Methylethylidene)Bis(4,1-Phenyleneoxysulphonyl-2,1-Phenyleneazo)]Bis[6-Aminonaphthalene-1-Sulphonate] is a high-purity, complex disazo dye intermediate with significant commercial importance. Its unique molecular structure, featuring multiple sulphonate groups, provides excellent water solubility and chromophoric properties, making it a critical building block for advanced colorants. This compound is essential for manufacturers in the specialty dyes and pigments industry, particularly for producing high-performance, light-fast colors for textiles, inks, and functional materials.

Application

• Primary Intermediate for Reactive Dyes: A key precursor in the synthesis of high-grade reactive dyes for cotton and cellulose fiber dyeing, valued for brilliant shades and wash-fastness.
• Specialty Pigment Manufacturing: Used in the production of complex organic pigments for automotive paints, industrial coatings, and plastics requiring superior color strength and durability.
• Functional Dyes for Non-Textile Uses: Serves as a starting material for dyes used in ink-jet inks, laser printing toners, and optical data storage media.
• Research & Development: Employed in academic and industrial R&D for developing novel chromophores, sensors, and advanced polymeric colorants.
• Paper Coloring: Can be utilized in the manufacture of dyes for high-quality paper and board products.

Basic Information

Product Name	Disodium 5,5'-[(1-Methylethylidene)Bis(4,1-Phenyleneoxysulphonyl-2,1-Phenyleneazo)]Bis[6-Aminonaphthalene-1-Sulphonate]
CAS No.	70161-18-1
Molecular Formula	C52H36N6Na2O14S4
Molecular Weight	1150.13 g/mol (approx.)
Synonyms	Disodium 5,5'-(isopropylidenebis(p-phenylenecxy-p-phenylenesulphonyl-2,1-phenyleneazo))bis(6-amino-1-naphthalenesulphonate); C.I. Reactive Orange 107 intermediate; Disazo dye intermediate with sulphonate groups; Reactive dye intermediate 70161-18-1; Bis(6-amino-1-naphthalenesulphonate) disazo compound; Water-soluble disazo dye precursor
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and high purity. Quality is verified through comprehensive analytical methods including HPLC for assay and impurity profiling, spectrophotometry for color value, and standard chemical tests. A detailed Certificate of Analysis (COA) documenting purity, identity, and key physical parameters is provided with every shipment to support your quality assurance protocols.

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). Due to its hygroscopic nature, the container must be kept sealed to minimize exposure to atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark brown to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Solubility (in Water)	Freely 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.