Description

Benzenesulfonic Acid, 4-Chloro-2-[[1-(2,5-Dichloro-4-Sulfophenyl)-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-4-Yl]Azo]-5-Methyl-, Calcium Salt is a high-purity, complex azo dye intermediate and pigment precursor. This compound is valued for its role in synthesizing high-performance pigments with excellent color strength and durability. It is primarily needed by manufacturers in the pigments, dyes, inks, and specialty coatings industries seeking to produce vivid and stable colors.

Application

• Primary Intermediate for High-Performance Pigments: Key building block in the synthesis of azo pigments, particularly for yellows, oranges, and reds.
• Industrial Coatings and Paints: Used to manufacture pigments for automotive, industrial, and protective coatings requiring weatherfastness and chemical resistance.
• Printing Inks: Serves as a precursor for pigments used in packaging, publication, and specialty inks.
• Plastics and Masterbatch Coloring: Imparts stable coloration to engineering plastics and polymer compounds.
• Textile Dyeing: Can be utilized in the production of dyes for synthetic fibers.
• Research & Development: Used in chemical research for developing new colorants and studying azo chemistry.

Basic Information

Product Name	Benzenesulfonic Acid, 4-Chloro-2-[[1-(2,5-Dichloro-4-Sulfophenyl)-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-4-Yl]Azo]-5-Methyl-, Calcium Salt
CAS No.	94612-72-3
Molecular Formula	C17H11CaCl3N4O7S2
Molecular Weight	593.89 g/mol
Synonyms	Calcium 4-chloro-2-[[1-(2,5-dichloro-4-sulfophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl]azo]-5-methylbenzenesulfonate; C.I. Pigment Yellow 191:1; Pigment Yellow 191:1; PY 191:1; Calcium salt of 4-chloro-2-((1-(2,5-dichloro-4-sulfophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl)azo)-5-methylbenzenesulfonic acid; Benzenesulfonic acid, 4-chloro-2-((1-(2,5-dichloro-4-sulfophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl)azo)-5-methyl-, calcium salt (1:1)
EINECS	Contact for details

Quality Control

Our production of this azo intermediate adheres to strict quality control protocols to ensure batch-to-batch consistency and purity for downstream synthesis. Quality is verified through advanced analytical techniques including HPLC, FT-IR, and elemental analysis. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with every shipment to support your quality assurance and regulatory needs.

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 product is hygroscopic (moisture-sensitive); keep container tightly sealed when not in use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Yellow to orange powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Calcium Content	6.5 - 7.5%
Sulfated Ash	≤ 20.0%

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