Description

1-Naphthalenesulfonic acid, 4-amino-, diazotized, coupled with 2-(2,4-dihydroxyphenyl)-3,5,7-trihydroxyphenyl-4H-1-benzopyran-4-one and (3,4-dihydroxyphenyl)(2,4,6-trihydroxyphenyl)methanone is a complex synthetic dye intermediate, specifically a metal-complex dye precursor. This compound matters for its ability to form highly stable and vibrant colorants, particularly for demanding technical applications where lightfastness and chemical resistance are critical. Industries that require high-performance pigments and dyes, such as those manufacturing inks, coatings, and specialty plastics, are the primary users of this advanced chemical.

Application

• High-Performance Pigments: As a key intermediate in the synthesis of complex organic pigments for automotive and industrial coatings.
• Specialty Inks: Used in the production of inks requiring excellent weatherability and color stability, such as those for outdoor signage and packaging.
• Functional Dyes: Potential application in the synthesis of dyes for synthetic fibers, including polyesters and nylons, where color fastness is paramount.
• Research & Development: Serves as a valuable building block in chemical R&D for creating novel chromophores and functional materials.
• Plastics and Polymers: For the coloration of engineering plastics that are exposed to harsh environmental conditions.

Basic Information

Product Name	1-Naphthalenesulfonic acid, 4-amino-, diazotized, coupled with 2-(2,4-dihydroxyphenyl)-3,5,7-trihydroxy-4H-1-benzopyran-4-one and (3,4-dihydroxyphenyl)(2,4,6-trihydroxyphenyl)methanone
CAS No.	12236-46-3
Molecular Formula	C38H24N2O14S
Molecular Weight	764.67 g/mol
Synonyms	Pigment Yellow 191; C.I. 18795; 4-Amino-1-naphthalenesulfonic acid, diazotized, coupled with morin and 2',3,4,4',6-pentahydroxybenzophenone; 2-[2,4-Dihydroxyphenyl]-3,5,7-trihydroxy-4H-1-benzopyran-4-one, compd. with diazotized 4-amino-1-naphthalenesulfonic acid and (3,4-dihydroxyphenyl)(2,4,6-trihydroxyphenyl)methanone; CI 18795; Morin Yellow complex; Aluminum complex of the azo dye derived from diazotized 4-amino-1-naphthalenesulfonic acid, morin, and 2',3,4,4',6-pentahydroxybenzophenone (common description of the metal complex form).
EINECS	Contact for details

Quality Control

Our production of 1-Naphthalenesulfonic acid, 4-amino-, diazotized, coupled with 2-(2,4-dihydroxyphenyl)-3,5,7-trihydroxy-4H-1-benzopyran-4-one and (3,4-dihydroxyphenyl)(2,4,6-trihydroxyphenyl)methanone adheres to stringent quality management systems to ensure batch-to-batch consistency and reliability for industrial applications. Each lot undergoes comprehensive analytical testing, including purity assay and impurity profiling. Certificates of Analysis (COA) detailing all relevant specifications are provided with every shipment to support your quality assurance protocols.

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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Yellow to orange-brown powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	Min. 95.0%
Loss on Drying	Max. 2.0%
Residue on Ignition (Sulfated Ash)	Max. 0.5%
Heavy Metals (as Pb)	Max. 20 ppm

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