Description

Pigment Brown 23 is a high-performance, synthetic organic pigment belonging to the benzimidazolone class. It is valued for its excellent color strength, durability, and strong resistance to heat, light, and weathering. This pigment is essential for manufacturers requiring a reliable and consistent brown shade in demanding applications. Its robust properties make it a preferred choice across the coatings, plastics, and specialty printing ink industries.

Application

• Industrial Coatings: Used in automotive OEM and refinish paints, coil coatings, and heavy-duty industrial finishes for its excellent weatherability and chemical resistance.
• Plastics Coloring: Imparts stable brown coloration to engineering plastics (e.g., PVC, polyolefins, ABS) and synthetic fibers during mass pigmentation.
• Printing Inks: A key component in high-quality packaging inks, decorative laminates, and other specialty printing applications requiring color fastness.
• Construction Materials: Incorporated into concrete, mortar, and other cementitious products for integral coloring of paving stones, roofing tiles, and architectural elements.
• Artists' Colors: Used in the formulation of professional-grade artists' paints, including acrylics and oils, for permanent brown hues.

Basic Information

Product Name	Pigment Brown 23
CAS No.	35869-64-8
Molecular Formula	C24H15Cl2N5O4
Molecular Weight	508.31 g/mol
Synonyms	C.I. Pigment Brown 23; Benzimidazolone Brown HFR; P.B. 23; C.I. 20060; 5-[(2,3-Dihydro-6-methyl-2-oxo-1H-benzimidazol-5-yl)azo]-N-(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)-3-[(2,4-dichlorophenyl)azo]-4-hydroxy-2-naphthalenecarboxamide; Permanent Brown HFR; Hostaperm Brown HFR; Cromophtal Brown 5R
EINECS	252-771-4

Quality Control

Our production of Pigment Brown 23 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Every lot is tested against key parameters including color strength, hue, particle size distribution, and rheological behavior. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing the specific test results. Our quality systems are designed to support compliance with global regulatory and industry standards, including REACH.

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 strong oxidizing agents. Under these conditions, the product maintains its stability and performance characteristics.

Specification

Item	Specification
Appearance	Brown Powder
Identification (IR)	Conforms
Color Strength	100 ± 5% (vs. Standard)
Hue	Within agreed tolerance
Particle Size (D50)	< 1.0 µm
Residue on Sieve (45 µm)	≤ 0.1 %
Volatile Matter (at 105°C)	≤ 2.0 %
pH Value (10% Aqueous Slurry)	6.0 - 8.0
Oil Absorption	40 - 60 g/100g
Lightfastness (1-8 Scale)	≥ 7
Heat Resistance	≥ 200°C

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