Description

Tetrasodium 7,7'-(Carbonyldiimino)Bis[4-Hydroxy-3-[(2-Methoxy-4-Sulphonatophenyl)Azo]Naphthalene-2-Sulphonate] is a high-purity, water-soluble synthetic organic dye belonging to the class of azo dyes with multiple sulphonate groups. This compound is valued for its strong and stable color properties, making it a critical component in demanding industrial applications where consistent performance is non-negotiable. It is primarily sought after by manufacturers in the textile, paper, and specialty ink industries for its excellent dyeing and printing characteristics.

Application

• Textile Dyeing: Used for dyeing cotton, wool, silk, and nylon fibers, providing vibrant and wash-fast colors.
• Paper Coloring: Imparts intense coloration to high-grade papers, including decorative and packaging materials.
• Ink Manufacturing: A key pigment for producing specialty inks, including those for flexographic and inkjet printing.
• Leather Finishing: Employed in the dyeing process for leather goods to achieve uniform and durable shades.
• Biological Staining: May be utilized as a histological stain in laboratory settings for microscopic analysis.
• Industrial Marker Fluids: Suitable for formulating colored fluids used in non-permanent markers and tracing systems.

Basic Information

Product Name	Tetrasodium 7,7'-(Carbonyldiimino)Bis[4-Hydroxy-3-[(2-Methoxy-4-Sulphonatophenyl)Azo]Naphthalene-2-Sulphonate]
CAS No.	56878-32-1
Molecular Formula	C44H28N6Na4O19S4
Molecular Weight	1184.93 g/mol
Synonyms	Acid Black 194; C.I. 28440; Tetrasodium 4,4'-carbonylbis[(7-hydroxy-8-[(2-methoxy-5-sulfophenyl)azo]-1,3-naphthalenedisulfonate)]; 7,7'-(Carbonyldiimino)bis[4-hydroxy-3-[(2-methoxy-4-sulfophenyl)azo]-2-naphthalenesulfonic acid] tetrasodium salt; C.I. Acid Black 194; Azo Black 194; Dye Acid Black 194
EINECS	Contact for details

Quality Control

Our production of Tetrasodium 7,7'-(Carbonyldiimino)Bis[4-Hydroxy-3-[(2-Methoxy-4-Sulphonatophenyl)Azo]Naphthalene-2-Sulphonate] adheres to stringent quality protocols to ensure batch-to-batch consistency and performance reliability. Each lot is analyzed against rigorous specifications for color strength, purity, and impurity profiles. Certificates of Analysis (COA) documenting key parameters are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Dark blue to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 5% (vs. Standard)
Moisture Content	≤ 5.0%
Water Solubility	Completely soluble
Ash Content (Sulfated)	≤ 30.0%
Heavy Metals (as Pb)	≤ 20 ppm

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