Description

Smoke Yellow CAS NO 2233-88-7 is a high-purity synthetic organic pigment belonging to the diarylide yellow class, valued for its excellent color strength and stability. This compound is essential for manufacturers requiring consistent, vibrant yellow hues in demanding industrial applications. It is primarily utilized by the plastics, inks, coatings, and specialty textile industries to achieve durable and lightfast coloration.

Application

• Plastics Coloring: Masterbatch and compound production for polyethylene (PE), polypropylene (PP), polystyrene (PS), and ABS resins.
• Printing Inks: Formulation of high-performance flexographic, gravure, and offset inks for packaging and publications.
• Industrial Coatings: Pigmentation for automotive refinish paints, industrial enamels, and powder coatings.
• Synthetic Fibers: Mass coloration of nylon, polyester, and polyolefin fibers.
• Rubber Products: Coloring for technical rubber goods, footwear, and sporting equipment.
• Artists' Colors: Used in the manufacture of professional-grade oil and acrylic paints.

Basic Information

Product Name	Smoke Yellow CAS NO 2233-88-7
CAS No.	2233-88-7
Molecular Formula	C₃₂H₂₆Cl₂N₆O₄
Molecular Weight	629.49 g/mol
Synonyms	Pigment Yellow 13; Diarylide Yellow AAA; C.I. 21100; Benzidine Yellow GR; Permanent Yellow GR; Vulcan Fast Yellow GR; 3,3'-[(3,3'-Dichloro[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[4-methyl-2-butanone]; 1,1'-(3,3'-Dichloro-4,4'-biphenylylene)bis(azo)-bis(2-methyl-4-pentanone)
EINECS	218-787-7

Quality Control

Our Smoke Yellow is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against key parameters including color strength, hue, particle size distribution, and thermal stability. A Certificate of Analysis (COA) detailing purity, physical properties, and heavy metal content is provided with every shipment to guarantee compliance with your specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at 15-25°C. This product is hygroscopic (moisture-sensitive); keep the original container tightly sealed when not in use to prevent caking and performance degradation due to moisture absorption.

Specification

Item	Specification
Appearance	Yellow Powder
Identification (IR)	Conforms to Standard
Color Strength	98 - 102% (vs. Standard)
Hue	Within agreed tolerance
Purity (HPLC)	≥ 97.0%
Volatile Matter (105°C)	≤ 2.0%
Ash Content	≤ 1.0%
Particle Size (D50)	0.2 - 0.5 μm
Heavy Metals (as Pb)	≤ 20 ppm
Specific Resistance	≥ 10⁴ ω·cm

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