Description

Benzoic acid, 2-hydroxy-, reaction products with formaldehyde, coupled with diazotized 5-amino-8-[[4-[(4-nitro-2-sulfophenyl)amino]phenyl]azo]-2-naphthalenesulfonic acid disodium salt is a complex, high-performance azo dye intermediate and pigment precursor. This compound matters for its ability to impart exceptional color strength, lightfastness, and thermal stability in demanding applications. It is primarily needed by manufacturers in the pigments, dyes, inks, and specialty coatings industries seeking to produce vivid and durable colors.

Application

• Primary Intermediate for High-Performance Pigments: Synthesis of complex azo pigments for plastics, masterbatches, and synthetic fibers.
• Industrial and Automotive Coatings: Imparts color and UV resistance in paints, powder coatings, and automotive finishes.
• Specialty Inks: Used in the formulation of high-quality printing inks, including packaging and security inks.
• Coloration of Polymers: For engineering plastics and resins requiring stable coloration under processing temperatures.
• Textile Dyeing Auxiliary: Acts as a key component in the production of dyes for synthetic fabrics.
• Research & Development: Serves as a building block for novel colorants and functional materials in chemical R&D.

Basic Information

Product Name	Benzoic acid, 2-hydroxy-, reaction products with formaldehyde, coupled with diazotized 5-amino-8-[[4-[(4-nitro-2-sulfophenyl)amino]phenyl]azo]-2-naphthalenesulfonic acid disodium salt
CAS No.	72245-24-0
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Pigment Red 187; Salicylic acid-formaldehyde resin coupled with diazotized 5-amino-8-{[4-[(4-nitro-2-sulfophenyl)amino]phenyl]azo}-2-naphthalenesulfonic acid, disodium salt; PR 187; Disodium 5-{[4-({4-[(4-nitro-2-sulfophenyl)amino]phenyl}azo)-8-hydroxynaphthalen-1-yl]azo}salicylate, polymer with formaldehyde; Azo pigment intermediate 72245-24-0; Dye intermediate CAS 72245-24-0; Complex azo pigment precursor
EINECS	Contact for details

Quality Control

Our production of this advanced intermediate adheres to strict batch-to-batch consistency protocols. Quality is verified through comprehensive analytical methods including HPLC for purity, spectrophotometry for color value, and elemental analysis. A Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment to ensure it meets your specific formulation requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is light-sensitive (store away from light) and hygroscopic (moisture-sensitive). Keep container tightly sealed when not in use to minimize exposure to moisture and air.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to reference spectrum
Purity (HPLC)	Min. 95%
Moisture Content	Max. 3.0%
Ash Content	Max. 1.0%
Heavy Metals (as Pb)	Max. 20 ppm
Solubility	Soluble in alkaline water, DMF, DMSO

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