Description

Acid Green 40 is a synthetic organic dye belonging to the acid dye class, identified by CAS No. 12219-87-3. This high-purity colorant is valued for its strong affinity for protein fibers and its ability to produce vibrant, wash-fast shades. It is primarily utilized by manufacturers in the textile, leather, and paper industries seeking reliable and consistent coloration for nylon, wool, silk, and other substrates. Our supply ensures consistent quality and batch-to-batch uniformity for industrial-scale production.

Application

• Textile Dyeing: Primary application for dyeing nylon, wool, silk, and modified acrylic fibers to achieve bright green shades with good light and wash fastness.
• Leather Coloring: Used in the dyeing of leather goods, providing rich and uniform color penetration for products like apparel, footwear, and upholstery.
• Paper Staining: Employed in the production of colored papers, specialty tissues, and decorative paper products.
• Ink Formulation: Serves as a colorant component in the manufacture of certain inks for specialized printing applications.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis, though specific grades should be verified.
• Wood Staining: Can be applied for coloring wood and wood-based materials to achieve specific aesthetic effects.

Basic Information

Product Name	Acid Green 40
CAS No.	12219-87-3
Molecular Formula	C32H30N4Na2O8S2
Molecular Weight	724.77 g/mol
Synonyms	Acid Green 40; C.I. 42125; C.I. Acid Green 40; Acid Leather Green V; Acid Green V; Lissamine Green B; Wool Green S; Naphthol Green B; Acid Green VS; D&C Green No. 8 (historical); Hexacol Acid Green V; Suracid Green V; Telon Green V
EINECS	Contact for details

Quality Control

Our Acid Green 40 is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for color strength, hue, and purity. We provide comprehensive Certificates of Analysis (COA) with key parameters including assay, impurity profile, and solubility, ensuring compliance with industry standards for consistent performance in your applications.

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. For long-term storage, maintain under low humidity conditions to prevent caking.

Specification

Item	Specification
Appearance	Dark green powder or granules
Identification (IR)	Conforms to standard
Assay (Color Strength)	≥ 95%
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Shade	Matches reference standard
Solubility in Water	Freely soluble

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