Description

Erio Green B is a specialized organic dye belonging to the class of chromium complex dyes, known for its excellent light and wash fastness properties. This high-performance colorant is engineered to deliver consistent, vibrant green shades in demanding industrial applications. It is an essential component for manufacturers in the textile, leather, and specialty coatings industries seeking durable and reliable coloration.

Application

• Textile Dyeing: Primarily used for dyeing wool, silk, and nylon fibers, providing excellent levelness and penetration.
• Leather Finishing: Applied in the dyeing of leather goods, offering rich color and good resistance to rubbing and perspiration.
• Ink Formulation: Serves as a key pigment in the production of specialty inks for packaging and security printing.
• Paper Coloration: Used in the tinting of high-grade papers and decorative laminates.
• Wood Staining: Employed in stains and finishes for wood to achieve consistent and fade-resistant green tones.
• Plastics and Polymers: Incorporated as a colorant for certain engineering plastics and synthetic materials.

Basic Information

Product Name	Erio Green B
CAS No.	12768-78-4
Molecular Formula	C28H18CrN4O8S2Na2
Molecular Weight	708.57 g/mol
Synonyms	Acid Green B; C.I. 10031; C.I. Acid Green 1; Chromium complex of 5-[(4-sulfo-1-naphthyl)azo]-8-hydroxyquinoline disodium salt; Erio Green BS; Eriogreen B; Wool Green B; Acid Leather Green B; Supranol Green B
EINECS	235-824-3

Quality Control

Our Erio Green B is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against stringent in-house specifications for critical parameters including color strength, shade, solubility, and impurity profile. A comprehensive Certificate of Analysis (COA) detailing assay, physical properties, and conformance is provided with every shipment.

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. The product is hygroscopic (moisture-sensitive); ensure the container is resealed tightly after each use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Dark green powder or granules
Identification (IR)	Conforms to standard
Assay (Colorant Content)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Conforms
Ash Content	Max. 1.0%
Heavy Metals (as Pb)	Max. 20 ppm
Shade and Strength	Within agreed tolerance vs. standard

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