Description

C.I. Pigment Yellow 139 is a high-performance, opaque yellow pigment belonging to the isoindolinone chemical class. This compound is valued for its excellent lightfastness, heat stability, and chemical resistance, making it a superior choice for demanding applications. It is primarily sought after by manufacturers in the plastics, coatings, and printing ink industries who require durable and vibrant coloration.

Application

• Plastics Coloring: For engineering plastics, PVC, polyolefins, and synthetic fibers requiring high-temperature processing stability.
• Industrial Coatings: Used in automotive, coil, and powder coatings where weather resistance and durability are critical.
• Printing Inks: Formulated into high-quality offset, gravure, and flexographic inks for packaging and publications.
• Masterbatch Production: A key component in color concentrates and compounds for uniform dispersion.
• Specialty Applications: Suitable for coloring spun-dyed fibers and other high-performance materials.

Basic Information

Product Name	C.I. Pigment Yellow 139
CAS No.	68859-68-7
Molecular Formula	C16H12Cl2N6O4
Molecular Weight	423.21 g/mol
Synonyms	Pigment Yellow 139; Isoindolinone Yellow 139; C.I. 56298; PY 139; 4,4'-[(6-Chloro-1,3,5-triazine-2,4-diyl)diimino]bis[N-(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)-2,5-dimethoxybenzamide]; Benzimidazolone Yellow H4G; Permanent Yellow H4G
EINECS	272-535-8

Quality Control

Our production of C.I. Pigment Yellow 139 adheres to stringent quality management systems to ensure batch-to-batch consistency. Every lot is tested against key performance parameters including color strength, hue, and rheological properties. A Certificate of Analysis (COA) detailing purity and physical specifications is provided with each shipment to guarantee compliance with your formulation requirements.

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	Yellow Powder
Identification (IR)	Conforms
Color Strength	100 ± 5% (vs. Standard)
Hue	Within agreed tolerance
Resistance to Light	7-8 (ISO 105-B02)
Heat Stability	> 280°C
Oil Absorption	40 - 50 g/100g
Particle Size (D50)	0.2 - 0.5 μm
Moisture Content	< 1.5%

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