Description

2,2'-[(2,4-Dihydroxy-1,3-Phenylene)Bis(Azo-4,1-Phenyleneimino)]Bis(5-Nitrobenzenesulphonic) Acid is a high-purity, complex azo dye intermediate valued for its precise molecular structure and functional groups. This compound is critical for synthesizing specialized dyes and pigments that require excellent lightfastness and specific color properties. It is primarily sought by manufacturers in the textile, ink, and advanced materials industries for producing high-performance colorants.

Application

• Key intermediate for the synthesis of high-grade, lightfast azo dyes and pigments.
• Used in the production of specialized colorants for textile fibers, including nylon and polyester.
• Manufacturing of colorants for inks, including those for packaging and security printing applications.
• Potential use as a chemical reagent in research and development for novel chromophores.
• Intermediate in the synthesis of dyes for leather and paper products.
• Component in the development of functional dyes for non-textile applications, such as in optics or electronics.

Basic Information

Item	Detail
Product Name	2,2'-[(2,4-Dihydroxy-1,3-Phenylene)Bis(Azo-4,1-Phenyleneimino)]Bis(5-Nitrobenzenesulphonic) Acid
CAS No.	78265-88-0
Molecular Formula	C30H20N8O12S2
Molecular Weight	724.66 g/mol
Synonyms	Acid Yellow 219 (C.I. 13949); 2,2'-[(2,4-Dihydroxy-1,3-phenylene)bis(azo-4,1-phenylenimino)]bis(5-nitrobenzenesulfonic acid); Benzenesulfonic acid, 2,2'-[(2,4-dihydroxy-1,3-phenylene)bis(azo-4,1-phenylenimino)]bis(5-nitro-; C.I. Acid Yellow 219; 2,2'-[(2,4-Dihydroxy-m-phenylene)bis(azo-p-phenylenimino)]di(5-nitrobenzenesulphonic acid); 78265-88-0; Acid Yellow 219
EINECS	Contact for details

Quality Control

Our production of 2,2'-[(2,4-Dihydroxy-1,3-Phenylene)Bis(Azo-4,1-Phenyleneimino)]Bis(5-Nitrobenzenesulphonic) Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing to ensure high purity and consistent performance as a dye intermediate. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are available upon request to support your quality assurance and regulatory 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 to prevent absorption of atmospheric moisture, which can affect product quality.

Specification

Item	Specification
Appearance	Yellow to Orange Powder
Identification (IR)	Conforms to Standard
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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