Description

Red 7 is a synthetic organic pigment belonging to the azo class, identified by CAS No. 1342-63-8. This high-performance colorant is valued for its strong, vibrant red hue and excellent tinting strength, making it a critical component for achieving consistent and durable coloration. It is primarily sought after by manufacturers in the coatings, plastics, and printing ink industries who require reliable, high-quality pigments for their formulations.

Application

• Industrial Coatings and Paints: Used in automotive finishes, industrial machinery coatings, and architectural paints for its color stability and weather resistance.
• Plastics and Polymers: Imparts a stable red color to PVC, polyolefins, and engineering plastics for consumer goods, packaging, and automotive parts.
• Printing Inks: A key pigment for offset, flexographic, and gravure inks used in packaging, publications, and commercial printing.
• Textile Printing and Dyeing: Employed in pigment printing pastes and coloration processes for fabrics.
• Specialty Applications: Suitable for coloring artists' materials, leather finishes, and other specialty products requiring a vivid red shade.

Basic Information

Product Name	Red 7
CAS No.	1342-63-8
Molecular Formula	C18H14N4O5S
Molecular Weight	398.39 g/mol
Synonyms	Pigment Red 7; C.I. 12420; Lithol Rubine; Permanent Red Toner 7B; Naphthol AS Red; 4-[(2-Methoxy-5-nitrophenyl)azo]-3-hydroxy-2-naphthanilide; 3-Hydroxy-4-[(2-methoxy-5-nitrophenyl)azo]-2-naphthamilide; Permanent Red FGR
EINECS	215-668-1

Quality Control

Our Red 7 pigment is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance. Quality is verified through comprehensive testing against key parameters including color strength, hue, particle size distribution, and chemical purity. Certificates of Analysis (COA) detailing these specifications are provided with every shipment 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). Keep away from incompatible materials and sources of ignition. The product is light-sensitive and should be stored away from direct light exposure to maintain its color properties.

Specification

Item	Specification
Appearance	Red Powder
Identification (IR)	Conforms
Color Strength	100 ± 5% (vs. Standard)
Hue	Within agreed tolerance
Purity (HPLC)	≥ 96.0%
Moisture Content	≤ 2.0%
Ash Content	≤ 1.0%
Particle Size (D50)	0.2 - 0.5 µm
Oil Absorption	40 - 60 g/100g
pH Value (10% Slurry)	6.0 - 8.0

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