Description

Disodium 7,7'-Iminobis[3-[(2,4-Dimethylphenyl)Azo]-4-Hydroxynaphthalene-2-Sulphonate] is a high-purity, synthetic organic compound belonging to the class of azo dyes and pigments. This chemical is valued for its excellent color strength, stability, and specific affinity in demanding industrial applications. It is primarily utilized by manufacturers in the textile, ink, and specialty coatings industries who require consistent and reliable colorants for their production processes.

Application

• Textile Dyeing: As a key colorant for synthetic and natural fibers, providing vibrant and wash-fast shades.
• Ink Formulation: Used in the production of printing inks for packaging, publications, and specialty printing.
• Industrial Coatings: Imparts color to paints, lacquers, and other surface coatings for plastics and metals.
• Paper Coloring: Employed in the dyeing of specialty papers and paper products.
• Leather Finishing: Used as a dye in the processing and coloring of leather goods.
• Plastics and Polymers: Acts as a color masterbatch component for coloring various plastic resins during manufacture.

Basic Information

Product Name	Disodium 7,7'-Iminobis[3-[(2,4-Dimethylphenyl)Azo]-4-Hydroxynaphthalene-2-Sulphonate]
CAS No.	6420-38-8
Molecular Formula	C44H34N6Na2O8S2
Molecular Weight	876.88 g/mol
Synonyms	Acid Black 107; C.I. 26370; Disodium 7,7'-iminobis(4-hydroxy-3-[(2,4-dimethylphenyl)azo]naphthalene-2-sulfonate); 7,7'-Iminobis[4-hydroxy-3-[(2,4-dimethylphenyl)azo]-2-naphthalenesulfonic acid] disodium salt; Azo Black 107; Leather Black 107; Dinatriumsalz der 7,7'-Iminobis[4-hydroxy-3-[(2,4-dimethylphenyl)azo]-2-naphthalinsulfonsäure]; Disodium 7,7'-(iminodi-p-phenyleneazo)di(4-hydroxy-2-naphthalenesulfonate)
EINECS	229-183-7

Quality Control

Our production of Disodium 7,7'-Iminobis[3-[(2,4-Dimethylphenyl)Azo]-4-Hydroxynaphthalene-2-Sulphonate] adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing to ensure consistent purity, color value, and performance characteristics. A detailed Certificate of Analysis (COA) is provided with each shipment, confirming compliance with agreed specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at ambient temperature (15-25°C). Keep away from incompatible materials and sources of heat.

Specification

Item	Specification
Appearance	Dark blue to black powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Water Solubility	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.