Description

Acid Green 3 is a synthetic organic dye belonging to the triarylmethane class, widely recognized for its vibrant green color. This high-purity colorant is essential for achieving consistent and durable coloration in a variety of industrial applications. It is primarily utilized by manufacturers in the textile, paper, leather, and specialty ink industries seeking reliable and efficient dyeing solutions. The compound is supplied under strict quality control to ensure batch-to-batch uniformity and performance.

Application

• Textile Dyeing: Used for coloring wool, silk, and nylon fibers, providing good wash and light fastness.
• Leather Finishing: Imparts a uniform green color to leather goods, including footwear, bags, and upholstery.
• Paper Staining: Employed in the production of colored papers, decorative tissues, and security papers.
• Ink Manufacturing: A key component in the formulation of specialty printing inks, including stamp pad and flexographic inks.
• Biological Staining: Used in histology and microscopy as a contrast stain for tissue samples.
• Wood Staining: Provides coloration for wood products and decorative veneers.
• Soap and Detergent Coloring: Adds color to cosmetic soaps and certain cleaning products.
• Plastics and Polymers: Can be used for coloring certain types of plastics and resins.

Basic Information

Product Name	Acid Green 3
CAS No.	4680-78-8
Molecular Formula	C27H25N2O7S2Na2
Molecular Weight	622.61 g/mol
Synonyms	Acid Green 3; Wool Green S; C.I. Acid Green 3; C.I. 42085; Lissamine Green B; Acid Leather Green SG; E142 (when used as a food color, status varies by region); Food Green S; Green S; Sodium 4-[(4-dimethylaminophenyl)-(4-dimethylazaniumylidenecyclohexa-2,5-dien-1-ylidene)methyl]-3-hydroxynaphthalene-2,7-disulfonate
EINECS	225-120-0

Quality Control

Our Acid Green 3 is manufactured under a strict quality management system. Each batch is analyzed to confirm identity, purity, and conformance to established specifications, including color strength and shade. A comprehensive Certificate of Analysis (COA) detailing results for assay, impurity profile, and physical parameters is provided with every shipment. Our quality protocols are designed to meet the needs of industrial applications requiring consistent performance and reliability.

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). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark green powder or granules
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 85% (as dye content)
Color Strength	100 ± 5% (vs. standard)
Shade	Matches reference standard
Moisture Content	Max. 5.0%
Water Insoluble Matter	Max. 0.5%
Heavy Metals (as Pb)	Max. 20 ppm
Arsenic (As)	Max. 3 ppm

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