Description

7,7'-(Carbonyldiimino)Bis[4-Hydroxy-3-[(2-Hydroxy-5-Nitrophenyl)Azo]-2-Naphthalenesulfonic Acid]Disodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. This compound is valued for its ability to impart specific color properties and act as a key building block in the synthesis of complex dyes and pigments. It is primarily required by manufacturers in the specialty chemicals, textile dyeing, and advanced materials sectors seeking consistent quality and reliable supply for their production processes.

Application

• Primary Intermediate for Azo Dyes: Serves as a critical precursor in the synthesis of high-performance azo dyes for textiles, leather, and paper.
• Specialty Pigment Manufacturing: Used in the production of complex organic pigments requiring specific chromophoric properties.
• Analytical Chemistry Reagent: Employed as a colorimetric reagent or indicator in specific analytical methodologies.
• Research & Development: Utilized in chemical research for developing new chromophores and functional materials.
• Ink Formulation: Potential use in the formulation of specialized inks where its color properties are advantageous.

Basic Information

Item	Details
Product Name	7,7'-(Carbonyldiimino)Bis[4-Hydroxy-3-[(2-Hydroxy-5-Nitrophenyl)Azo]-2-Naphthalenesulfonic Acid]Disodium Salt
CAS No.	61968-53-4
Molecular Formula	C34H20N6Na2O14S2
Molecular Weight	846.72 g/mol
Synonyms	Acid Red 337; C.I. 17210; 7,7'-Carbonyldiimino)bis[4-hydroxy-2-naphthalenesulfonic acid, 3,3'-(2-hydroxy-5-nitrophenyl)azo] disodium salt; Disodium 7,7'-(carbonyldiimino)bis[4-hydroxy-3-[(2-hydroxy-5-nitrophenyl)azo]-2-naphthalenesulfonate]; Azo dye intermediate 61968-53-4; Nitro Azo Dye Intermediate; C.I. Acid Red 337 (unspecified salt)
EINECS	Contact for details

Quality Control

Our production of 7,7'-(Carbonyldiimino)Bis[4-Hydroxy-3-[(2-Hydroxy-5-Nitrophenyl)Azo]-2-Naphthalenesulfonic Acid]Disodium Salt adheres to stringent quality management protocols to ensure batch-to-batch consistency and reliability. The product undergoes rigorous analytical testing, including HPLC for purity and identity confirmation. Certificates of Analysis (COA) documenting key specifications are provided with each shipment and 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 (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which may affect product performance.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm

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