Description

Tetrasodium (4Z)-4-[[4-(6,8-Disulfonatonaphthalen-2-Yl)Diazenylnaphthalen-1-Yl]Hydrazinylidene]-3-Oxo-Naphthalene-2,7-Disulfonate is a high-purity, water-soluble organic dye intermediate and colorant. This compound is valued for its excellent chromophoric properties and stability, making it a critical building block for advanced color formulations. It is primarily required by manufacturers in the specialty dyes, pigments, and analytical reagent sectors seeking consistent and reliable performance.

Application

• Primary Intermediate for Reactive Dyes: Key precursor in the synthesis of high-grade reactive dyes for textiles, particularly cotton and cellulose fibers.
• Food Colorant Manufacturing: Used in the production of certain synthetic food dyes (where approved by regulatory bodies) requiring specific color shades and solubility.
• Inkjet Ink Formulations: Provides vibrant color and stability in high-performance industrial and photographic inkjet inks.
• Biological Staining Reagents: Serves as a component in specialized histological and cytological stains for laboratory diagnostics and research.
• Laser Dye and Optical Applications: Utilized in the development of dyes for tunable lasers and other optical devices due to its specific light-absorption characteristics.
• Analytical Chemistry: Acts as a complexometric indicator or a standard in spectrophotometric analysis and method development.

Basic Information

Product Name	Tetrasodium (4Z)-4-[[4-(6,8-Disulfonatonaphthalen-2-Yl)Diazenylnaphthalen-1-Yl]Hydrazinylidene]-3-Oxo-Naphthalene-2,7-Disulfonate
CAS No.	4197-00-6
Molecular Formula	C30H16N4Na4O16S4
Molecular Weight	912.68 g/mol
Synonyms	Acid Black 1, Tetrasodium Salt; Naphthalene Black 12B; C.I. 20470; Amido Black 10B, Tetrasodium Salt; 4-Amino-5-hydroxy-3-[(4-nitrophenyl)azo]-6-(phenylazo)-2,7-naphthalenedisulfonic Acid, Tetrasodium Salt; Buffalo Black NBR; C.I. Acid Black 1 (Tetrasodium Salt)
EINECS	224-082-3

Quality Control

Our production of Tetrasodium (4Z)-4-[[4-(6,8-Disulfonatonaphthalen-2-Yl)Diazenylnaphthalen-1-Yl]Hydrazinylidene]-3-Oxo-Naphthalene-2,7-Disulfonate adheres to stringent quality protocols. Every batch undergoes comprehensive analytical testing including HPLC for purity, spectrophotometry for color strength, and heavy metal screening to ensure it meets the specifications required for sensitive applications. 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 a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent absorption of atmospheric moisture, 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	98 - 102% (vs. Standard)
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 30.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Completely soluble

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