Description

Benzenesulfonic Acid, 4-Chloro-2-4,5-Dihydro-3-Methyl-5-Oxo-1-(3-Sulfophenyl)-1H-Pyrazol-4-Ylazo-5-Methyl-, Strontium Salt (1:1) is a specialized metallized azo dye complex, recognized by CAS number 136248-04-9. This compound is valued for its excellent color fastness and stability, making it a critical component in high-performance pigment formulations. It is primarily sought by manufacturers in the coatings, plastics, and specialty inks industries who require durable and vibrant coloration.

Application

• High-Performance Industrial Coatings: Used as a pigment for automotive, coil, and powder coatings requiring superior weatherability and chemical resistance.
• Engineering Plastics and Polymers: Imparts stable coloration to nylon, polyester, and other polymers processed at high temperatures.
• Specialty Printing Inks: A key component in inks for security printing, packaging, and other applications demanding high lightfastness.
• Masterbatch Production: Employed in the manufacture of color concentrates for uniform dispersion in various plastic matrices.
• Textile Pigmentation: Suitable for spin dyeing of synthetic fibers where color consistency and fastness are paramount.
• Artists' and Professional-Grade Paints: Used in formulations where pigment permanence and intensity are critical.

Basic Information

Product Name	Benzenesulfonic Acid, 4-Chloro-2-4,5-Dihydro-3-Methyl-5-Oxo-1-(3-Sulfophenyl)-1H-Pyrazol-4-Ylazo-5-Methyl-, Strontium Salt (1:1)
CAS No.	136248-04-9
Molecular Formula	C17H12ClN4O7S2Sr
Molecular Weight	567.96 g/mol (approx.)
Synonyms	Strontium 4-Chloro-2-[4,5-dihydro-3-methyl-5-oxo-1-(3-sulfophenyl)-1H-pyrazol-4-yl]azo-5-methylbenzenesulfonate; C.I. Pigment Red 266; Strontium Lake Red 266; Azo Pigment Strontium Salt; 4-Chloro-2-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-5-methylbenzenesulfonic Acid Strontium Salt; Strontium 4-Chloro-5-methyl-2-[(3-methyl-5-oxo-1-phenyl-4,5-dihydro-1H-pyrazol-4-yl)azo]benzenesulfonate
EINECS	Contact for details

Quality Control

Our production of this pigment adheres to rigorous quality control protocols to ensure batch-to-batch consistency and performance. Key parameters including color strength, shade, and physical properties are stringently monitored. A comprehensive Certificate of Analysis (COA) detailing purity, heavy metal content, and other critical specifications is provided with every shipment to support your quality assurance systems.

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). Keep away from incompatible materials and sources of ignition.

Specification

Item	Specification
Appearance	Red Powder
Identification (IR)	Conforms
Assay (Pigment Content)	≥ 95.0%
Color Strength	100 ± 5% (vs. Standard)
Shade	Within agreed tolerance
Moisture Content	≤ 2.0%
Ash Content	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Particle Size (D50)	Contact for details

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