Description

Red No. 228 is a synthetic organic colorant widely used as a high-performance pigment and dye. This compound is valued for its vibrant hue, stability, and versatility across demanding industrial applications. It is essential for manufacturers in the coatings, plastics, and specialty inks sectors seeking consistent and reliable coloration.

Application

• Industrial Coatings and Paints: Used as a pigment for automotive, architectural, and industrial finishes requiring color fastness and durability.
• Plastics and Polymers: Imparts stable coloration to a wide range of thermoplastic and thermoset materials during masterbatch production.
• Printing Inks: A key component in specialty inks for packaging, publications, and security printing applications.
• Textile Dyeing: Employed in the coloration of synthetic fibers where specific shade and wash-fastness properties are required.
• Colored Filters and Optical Materials: Used in the manufacture of lenses, films, and light-filtering devices.
• Research and Development: Serves as a chemical intermediate or reference standard in analytical and synthetic chemistry laboratories.

Basic Information

Product Name	Red No. 228
CAS No.	70632-40-5
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Pigment Red 228; C.I. 56205; Red 228; Pigment Red 228; Naphthol AS-based Red Pigment; Arylide Red; Permanent Red 228; Naphthol Red 228
EINECS	Contact for details

Quality Control

Our Red No. 228 is produced under a rigorous quality management system. Each batch undergoes comprehensive analytical testing to ensure consistency in color strength, shade, and physical properties. Certificates of Analysis (COA) documenting purity, heavy metal content, and other critical parameters are available upon request to support your quality assurance protocols.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent moisture absorption, which can affect product performance.

Specification

Item	Specification
Appearance	Red Powder
Identification (IR)	Conforms
Color Strength	100 ± 5% (vs. Standard)
Hue	Within agreed tolerance
Moisture Content	≤ 2.0%
Ash Content	≤ 1.0%
Particle Size (Residue on 45μm)	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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