Description

Sodium 3-benzamido-4-hydroxy-5-[[1-[[4'-[[2-[[2-hydroxy-5-(methylsulphonyl)phenyl]azo]-1,3-dioxobutyl]amino]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]carbamoyl]-2-oxopropyl]azo]benzenesulphonate is a high-performance, water-soluble azo dye intermediate of significant industrial importance. Its complex polyazo structure is engineered to deliver superior color strength, brightness, and excellent fastness properties in demanding applications. This compound is primarily required by manufacturers in the textile, leather, and specialty ink industries for producing high-quality, durable dyes and pigments.

Application

• Primary intermediate for the synthesis of high-grade reactive and direct dyes used in cotton and cellulose fiber dyeing.
• Key component in the manufacture of leather dyes, providing deep, uniform shades with good wash and light fastness.
• Precursor for specialty pigments and colorants in inks, coatings, and plastics where specific hue and stability are required.
• Used in research and development of novel chromophores and advanced dye systems for new material applications.
• Potential use in functional dyes for non-textile applications such as sensors or imaging technologies.

Basic Information

Product Name	Sodium 3-benzamido-4-hydroxy-5-[[1-[[4'-[[2-[[2-hydroxy-5-(methylsulphonyl)phenyl]azo]-1,3-dioxobutyl]amino]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]carbamoyl]-2-oxopropyl]azo]benzenesulphonate
CAS No.	70210-32-1
Molecular Formula	C48H38N8Na2O16S3
Molecular Weight	~1125.06 g/mol (Contact for exact details)
Synonyms	Benzenesulfonic acid, 3-benzamido-4-hydroxy-5-[[1-[[4'-[[2-[[2-hydroxy-5-(methylsulfonyl)phenyl]azo]-1,3-dioxobutyl]amino]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]carbamoyl]-2-oxopropyl]azo]-, disodium salt; Polyazo dye intermediate; Reactive Black 5 precursor (related); C.I. 20505 (related structures); Disodium salt of a benzamide-azo-naphthalene sulfonate derivative; Azo dye coupling component; High fastness dye intermediate.
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and performance reliability. Quality is verified through comprehensive analytical testing including HPLC for purity, spectrophotometry for color value, and stringent impurity profiling. A Certificate of Analysis (COA) detailing all specifications is provided with each shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Keep away from strong oxidizing agents. The material is moisture-sensitive; ensure the container is kept tightly sealed to prevent absorption of atmospheric humidity.

Specification

Item	Specification
Appearance	Dark brown to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Completely soluble
Heavy Metals (as Pb)	Max. 20 ppm
Related Substances (HPLC)	Total impurities: Max. 5.0%

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