Description

7-Hydroxy-8-[[4-[(3-Phosphonophenyl)Azo]-2-Sulphophenyl]Azo]Naphthalene-1,3-Disulphonic Acid, Ammonium Sodium Salt is a high-purity, water-soluble azo dye intermediate of significant industrial importance. This compound is valued for its ability to impart strong, stable coloration and its functional phosphonic acid group, which enhances substrate affinity. It is primarily required by manufacturers in the textile, leather, paper, and specialty ink industries for producing high-performance dyes and pigments.

Application

• Textile Dyeing: A key intermediate for synthesizing reactive and direct dyes for cotton, wool, and nylon.
• Leather Coloring: Used in the production of dyes for high-quality leather finishing.
• Paper Industry: Employed in the manufacture of colorants for specialty papers and packaging.
• Ink Formulation: Serves as a precursor for pigments in inks for digital and industrial printing.
• Research & Development: Used as a standard or building block in chemical research for novel chromophores.
• Analytical Reagents: Potential use as a colorimetric indicator or complexometric agent in specific analytical methods.

Basic Information

Product Name	7-Hydroxy-8-[[4-[(3-Phosphonophenyl)Azo]-2-Sulphophenyl]Azo]Naphthalene-1,3-Disulphonic Acid, Ammonium Sodium Salt
CAS No.	85099-46-3
Molecular Formula	C22H18N4O13P S3 · xNa · yNH4
Molecular Weight	Contact for details
Synonyms	7-Hydroxy-8-{[4-(3-phosphonophenyl)azo]-2-sulfophenyl}azo-1,3-naphthalenedisulfonic acid, ammonium sodium salt; C.I. Reactive Red 241; Reactive Red 241; Phosphonated Azo Dye Intermediate; Ammonium sodium 7-hydroxy-8-[[4-[(3-phosphonophenyl)azo]-2-sulfophenyl]azo]naphthalene-1,3-disulfonate; 85099-46-3; 7-Hydroxy-8-({4-[(3-phosphonophenyl)diazenyl]-2-sulfophenyl}diazenyl)naphthalene-1,3-disulfonic acid ammonium sodium salt
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and performance. A detailed Certificate of Analysis (COA) documenting purity, assay, and impurity profiles is provided with each shipment to guarantee it meets your specific application requirements.

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 after opening to prevent moisture absorption, which can affect product performance and handling.

Specification

Item	Specification
Appearance	Dark red to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Solubility (in Water)	Clear solution at 1%
Heavy Metals (as Pb)	≤ 20 ppm
pH (1% Solution)	6.0 - 8.0

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