Description

Dilithium 5-[[4'-[[2,6-Diamino-3-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]Salicylate CAS NO 70632-09-6 is a high-purity, water-soluble azo dye intermediate with a complex, multi-azo structure. This compound is valued for its ability to impart exceptional color strength and thermal stability in demanding applications. It is primarily utilized by manufacturers in the textile, ink, and specialty polymer industries seeking advanced colorants and functional additives.

Application

• Textile Dyeing and Printing: As a key intermediate for producing high-performance, wash-fast azo dyes for synthetic and natural fibers.
• Ink Manufacturing: Used in the formulation of industrial inks, including those for packaging and security printing, due to its color stability.
• Functional Polymer Additive: Imparts color and can act as a UV stabilizer or functional moiety in specialty plastics and coatings.
• Analytical Chemistry: Serves as a chromogenic reagent or a standard for analytical method development and calibration.
• Research & Development: Employed in academic and industrial R&D for synthesizing novel colorants and studying azo compound chemistry.

Basic Information

Product Name	Dilithium 5-[[4'-[[2,6-Diamino-3-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]Salicylate
CAS No.	70632-09-6
Molecular Formula	C39H28Li2N8O7S
Molecular Weight	770.68 g/mol
Synonyms	Lithium 5-[[4'-[[2,6-diamino-3-[(4-sulfophenyl)azo]phenyl]azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]salicylate; Dilithium 5-[(4'-[2,6-diamino-3-(4-sulfophenylazo)phenylazo]-3,3'-dimethylbiphenyl-4-yl)azo]salicylate; Azo dye intermediate 70632-09-6; C.I. 18050 dilithium salt; Direct Black 22 dilithium salt (related); 5-[[4'-[[2,6-Diamino-3-[(4-sulfonatophenyl)azo]phenyl]azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]salicylic acid dilithium salt
EINECS	Contact for details

Quality Control

Our production of Dilithium 5-[[4'-[[2,6-Diamino-3-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]Salicylate adheres to stringent quality protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed against comprehensive specifications, including HPLC assay for purity, spectrophotometric color strength, and residual solvent analysis. A detailed Certificate of Analysis (COA) confirming compliance is provided with every shipment.

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 tightly sealed after each use to prevent moisture absorption, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Color Strength	95 - 105% of standard
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 15.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (1% in Water)	Complete, clear solution

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