Description

Ci 933 (CAS NO 91829-95-7) is a high-performance organic pigment, specifically a member of the diketopyrrolopyrrole (DPP) family, renowned for its exceptional color strength and durability. This compound is critical for manufacturers requiring brilliant, opaque red shades with outstanding lightfastness and weather resistance. It is an essential raw material for the plastics, coatings, and high-quality ink industries, where consistent color performance and long-term stability are non-negotiable.

Application

• Industrial Coatings: Used in automotive, coil, and powder coatings for durable, fade-resistant red finishes.
• Plastics Coloring: Imparts vibrant, heat-stable red coloration to engineering plastics, masterbatches, and synthetic fibers.
• Printing Inks: A key component in high-performance packaging, publication, and decorative inks requiring excellent opacity and gloss.
• Specialty Pigments: Employed in the formulation of artists' colors and other applications demanding superior chromaticity and permanence.

Basic Information

Item	Detail
Product Name	Ci 933
CAS No.	91829-95-7
Molecular Formula	C18H10Cl2N2O2
Molecular Weight	357.19 g/mol
Synonyms	Pigment Red 254; C.I. Pigment Red 254; DPP Red BO; 3,6-Bis(4-chlorophenyl)-2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione; Diketopyrrolopyrrole Red; CI PR254; 254 Red; Permanent Red DPP
EINECS	Contact for details

Quality Control

Our production of Ci 933 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. The pigment is manufactured under controlled conditions, with quality verified against key parameters for color strength, hue, and physical properties. Certificates of Analysis (COA) documenting purity, particle size distribution, and other critical specifications are available upon request 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). Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Bright Red Powder
Identification (IR)	Conforms
Color Strength	100 ± 5% (vs. Standard)
Hue	Within agreed tolerance
Purity (HPLC)	≥ 98.0%
Ash Content	≤ 1.0%
Moisture (Karl Fischer)	≤ 1.0%
Particle Size (D50)	Contact for details

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