Description

Trisodium [3-Hydroxy-4-[(2-Hydroxy-1-Naphthyl)Azo]Naphthalene-1-Sulphonato(3-)][6-Hydroxy-5-[(2-Hydroxy-1-Naphthyl)Azo]Naphthalene-1-Sulphonato(3-)]Chromate(3-) is a high-purity, complex chromium azo dye lake, valued for its excellent color strength and stability. This compound is engineered to deliver consistent, vibrant coloration and reliable performance in demanding industrial applications. It is primarily utilized by manufacturers in the pigments, inks, coatings, and specialty plastics sectors where precise hue and durability are critical.

Application

• Primary use as a high-performance pigment and colorant for industrial coatings and paints.
• Formulation of specialty printing inks, including for packaging and security applications.
• Coloration of plastics and synthetic polymers to achieve specific, stable shades.
• Manufacturing of artist's colors and decorative pigments.
• Potential use in the coloration of specialty textile fibers and finishes.
• Research and development of novel functional materials and optical filters.

Basic Information

Product Name	Trisodium [3-Hydroxy-4-[(2-Hydroxy-1-Naphthyl)Azo]Naphthalene-1-Sulphonato(3-)][6-Hydroxy-5-[(2-Hydroxy-1-Naphthyl)Azo]Naphthalene-1-Sulphonato(3-)]Chromate(3-)
CAS No.	61916-42-5
Molecular Formula	C40H22CrN4Na3O14S2
Molecular Weight	993.78 g/mol
Synonyms	C.I. Pigment Red 265; Trisodium Chromium Complex of 3-Hydroxy-4-[(2-hydroxy-1-naphthyl)azo]naphthalene-1-sulfonic acid; Chromium complex of 1-(2-Hydroxy-1-naphthylazo)-2-naphthol-4-sulfonic acid; Pigment Red 265; PR 265; C.I. 77202; Chromium Lake of Azo Dye; 1-Naphthalenesulfonic acid, 3-hydroxy-4-[(2-hydroxy-1-naphthalenyl)azo]-, chromium complex
EINECS	Contact for details

Quality Control

Our production of this chromium complex pigment adheres to stringent quality protocols to ensure batch-to-batch consistency and performance. Every lot is tested against comprehensive specifications for color value, purity, and physical properties. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting key parameters 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 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.

Specification

Item	Specification
Appearance	Fine Powder
Color	Characteristic Red Shade
Identification (IR)	Conforms
Assay (Chromium Content)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Particle Size (Typical)	Contact for details

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