Description

Sodium Bis[1-[[2-Hydroxy-3-Nitro-5-tert-Pentylphenyl]Azo]-2-Naphtholato(2-)]Chromate(1-) is a high-performance, organometallic azo dye complex valued for its exceptional color strength and stability. This compound, identified by CAS NO 57206-83-4, is engineered to deliver consistent, vibrant coloration in demanding industrial applications. It is primarily utilized by manufacturers in the plastics, coatings, and specialty inks industries seeking reliable and durable pigments.

Application

• Pigment for Engineering Plastics: Imparts stable, heat-resistant coloration to polycarbonate, nylon, and other high-performance polymers.
• Industrial Coatings and Paints: Used in formulations requiring excellent weatherability, lightfastness, and chemical resistance.
• Specialty Printing Inks: Provides intense color for security inks, packaging inks, and other high-value printing applications.
• Automotive Finishes: Contributes to durable and vibrant colors in automotive paint systems.
• Masterbatch Production: A key colorant for creating concentrated pigment preparations used in plastic compounding.
• Coloration of Synthetic Fibers: Used in the dyeing and mass coloration of certain synthetic textiles.

Basic Information

Product Name	Sodium Bis[1-[[2-Hydroxy-3-Nitro-5-tert-Pentylphenyl]Azo]-2-Naphtholato(2-)]Chromate(1-)
CAS No.	57206-83-4
Molecular Formula	C42H32CrN6NaO8
Molecular Weight	823.72 g/mol
Synonyms	C.I. Pigment Red 187; Sodium 1-[[2-hydroxy-3-nitro-5-(1,1-dimethylpropyl)phenyl]azo]-2-naphtholato(2-)-chromate(1-); C.I. 12467; Pigment Red 187; Chromium complex of 1-[(2-hydroxy-3-nitro-5-tert-pentylphenyl)azo]-2-naphthol; Sodium Chromium Azo Dye Complex; Sodium 2-Naphtholatoazo Chromate Complex
EINECS	Contact for details

Quality Control

Our production of Sodium Bis[1-[[2-Hydroxy-3-Nitro-5-tert-Pentylphenyl]Azo]-2-Naphtholato(2-)]Chromate(1-) adheres to stringent quality protocols to ensure batch-to-batch consistency and performance reliability. Every lot is analyzed against key specifications for color value, purity, and physical properties. Certificates of Analysis (COA) documenting these results are 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, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture, which can affect performance.

Specification

Item	Specification
Appearance	Reddish-Brown Powder
Identification (IR)	Conforms to Standard
Assay (Chromium Content)	Min. 6.0%
Color Strength	100 ± 5% (vs. Standard)
Moisture Content	Max. 2.0%
Residue on Sieve (45μm)	Max. 0.5%
pH (10% Aqueous Slurry)	6.0 - 8.0

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