Description

Crocein Scarlet 7B is a synthetic azo dye known for its vibrant red hue. This high-performance colorant is valued for its strong tinctorial strength and good fastness properties in various substrates. It is primarily utilized by manufacturers in the textile, leather, and paper industries seeking reliable and consistent coloration. The product is supplied under the identifier CAS NO 6226-76-2.

Application

Crocein Scarlet 7B serves as a critical coloring agent across several industrial sectors. Its primary and related applications include:

• Textile Dyeing: For coloring natural and synthetic fibers, including cotton, wool, and nylon.
• Leather Finishing: Imparts a durable and uniform red color to leather goods and upholstery.
• Paper Staining: Used in the production of colored papers, tissues, and specialty packaging.
• Ink Formulation: A component in the manufacture of printing inks for various applications.
• Biological Staining: Employed in histological and cytological preparations in laboratory settings.
• Plastics and Polymers: For mass coloration of certain plastic materials during manufacture.

Basic Information

Product Name	Crocein Scarlet 7B
CAS No.	6226-76-2
Molecular Formula	C20H12N2Na2O7S2
Molecular Weight	502.42 g/mol
Synonyms	Acid Red 73; C.I. 27290; Croceine Scarlet 7B; Eosin Scarlet; Food Red 10; Lissamine Scarlet V; Paper Scarlet 7B; Scarlet 7B; Scarlet GN; Sodium 4-[(2-hydroxy-1-naphthyl)azo]-3-methylbenzenesulfonate
EINECS	228-306-9

Quality Control

Our Crocein Scarlet 7B is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise color strength, purity, and compositional specifications. A Certificate of Analysis (COA) detailing key parameters such as assay, hue, and impurity profile is available for every shipment to guarantee consistency and performance for your application.

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	Red to dark red powder
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 85%
Color Strength	95 - 105% of standard
Moisture Content	Max. 5.0%
Water Insoluble Matter	Max. 0.5%
Heavy Metals (as Pb)	Max. 20 ppm

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