Description

Acid Green 25 is a synthetic organic dye belonging to the acid dye class, widely recognized for its bright green hue and good lightfastness. It is a critical coloring agent valued for its strong affinity to protein fibers like wool, silk, and nylon, as well as its utility in various industrial applications. This product is essential for manufacturers in the textile, leather, paper, and specialty ink industries seeking reliable and vibrant green coloration.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers, providing excellent color yield and wash fastness.
• Leather Coloring: Used in the finishing process of leather goods to impart a uniform and durable green color.
• Paper Staining: Employed in the production of colored papers, including decorative and specialty papers.
• Ink Formulation: A key component in the manufacture of inks for ballpoint pens, stamp pads, and other writing instruments.
• Biological Staining: Utilized in histology and microscopy as a stain for specific tissue components.
• Wood Staining: Applied for coloring wood and wood-based products to achieve desired aesthetic effects.

Basic Information

Product Name	Acid Green 25
CAS No.	4403-90-1
Molecular Formula	C28H20N2Na2O8S2
Molecular Weight	622.58 g/mol
Synonyms	Acid Green 25; C.I. Acid Green 25; Wool Green S; Lissamine Green B; Acid Leather Green V; Eosin Green; Acid Fast Green; Food Green 4 (Note: Verify regulatory status for food use); C.I. 61570
EINECS	224-546-1

Quality Control

Our Acid Green 25 is manufactured under a strict quality management system to ensure batch-to-batch consistency and high performance. Each lot is tested against rigorous specifications for color strength, purity, solubility, and fastness properties. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical parameters is 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 strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark green powder or granules
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 85%
Color Strength	100 ± 5% (vs. Standard)
Moisture Content	Max. 5.0%
Water Solubility	Conforms
Ash Content	Max. 1.0%
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.