Description

Red 33 CAS NO 1342-94-5 is a synthetic organic colorant belonging to the azo dye class, widely recognized for its vibrant and stable red hue. This compound is valued for its excellent color strength and compatibility with various industrial formulations, ensuring consistent and reliable performance. It serves as a critical component for manufacturers in the textile, plastics, and specialty coatings industries seeking high-quality, durable coloration solutions.

Application

• Textile Dyeing and Printing: Used for coloring synthetic and natural fibers, providing excellent wash and light fastness.
• Plastics and Polymers: Imparts a stable red color to polyolefins, PVC, and other polymer matrices during masterbatch production.
• Industrial Coatings and Paints: Employed in solvent-based and aqueous coating systems for automotive, architectural, and industrial finishes.
• Inks: A key pigment for printing inks, including packaging and publication inks, due to its color consistency.
• Paper Coloring: Used in the surface treatment and mass coloration of specialty papers and boards.
• Leather Finishing: Applied in dyes and finishes for leather goods to achieve uniform and vibrant red shades.

Basic Information

Product Name	Red 33
CAS No.	1342-94-5
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Pigment Red 33; C.I. 12320; Permanent Red FRR; Red 33 Pigment; Pyrazolone Red; 1-[(4-Methyl-2-nitrophenyl)azo]-2-naphthalenol; Pigment Red 33; C.I. Pigment Red 33 (VAT)
EINECS	Contact for details

Quality Control

Our Red 33 is manufactured under a strict quality management system to ensure batch-to-batch consistency and high performance. Quality parameters including color strength, shade, particle size distribution, and chemical purity are rigorously tested. A Certificate of Analysis (COA) documenting these specifications is provided with every shipment to guarantee compliance with your technical 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	Red Powder
Identification (IR)	Conforms
Color Strength	100 ± 5% (vs. Standard)
Hue	Within agreed tolerance
Purity (HPLC)	≥ 95.0%
Moisture Content	≤ 2.0%
Ash Content	≤ 1.0%
Particle Size (D50)	≤ 5.0 μm

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