Description

2,4-Dihydro-2-[2-Methoxy-5-[[2-(Propionyloxy)Ethyl]Sulphonyl]Phenyl]-5-Methyl-4-[(2-Nitrophenyl)Azo]-3H-Pyrazol-3-One CAS NO 85750-12-5 is a specialized azo pyrazolone derivative, valued for its role as a high-performance intermediate in the synthesis of advanced colorants. This compound is engineered to provide a critical building block for creating dyes and pigments with enhanced color strength and application-specific properties. It is primarily required by manufacturers in the dye and pigment industry for producing high-value products for textiles, inks, and specialty coatings.

Application

• Primary intermediate for the synthesis of azo disperse dyes and pigments.
• Key component in manufacturing colorants for synthetic fiber dyeing, particularly polyester and acetate.
• Used in the production of high-performance inks for digital and industrial printing applications.
• Employed in the development of specialty coatings and colorants requiring specific lightfastness and thermal stability.
• Acts as a precursor in research and development of novel functional dyes for non-textile applications.
• Utilized in the fine chemical industry for custom organic synthesis projects.

Basic Information

Product Name	2,4-Dihydro-2-[2-Methoxy-5-[[2-(Propionyloxy)Ethyl]Sulphonyl]Phenyl]-5-Methyl-4-[(2-Nitrophenyl)Azo]-3H-Pyrazol-3-One
CAS No.	85750-12-5
Molecular Formula	C28H27N5O8S
Molecular Weight	593.61 g/mol
Synonyms	Disperse Red 343; C.I. 60756; 2,4-Dihydro-5-methyl-2-[2-methoxy-5-[(2-propionyloxyethyl)sulfonyl]phenyl]-4-[(2-nitrophenyl)azo]-3H-pyrazol-3-one; 3H-Pyrazol-3-one, 2,4-dihydro-2-[2-methoxy-5-[[2-(1-oxopropoxy)ethyl]sulfonyl]phenyl]-5-methyl-4-[(2-nitrophenyl)azo]-; 2-[2-Methoxy-5-[2-(propionyloxy)ethylsulfonyl]phenyl]-5-methyl-4-(2-nitrophenylazo)-2,4-dihydropyrazol-3-one
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed using modern analytical techniques including HPLC, IR, and NMR to confirm identity and composition. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with every shipment to support your quality assurance processes.

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 minimize exposure to atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 2.0%

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