Description

C.I. Acid Violet 121 is a synthetic anthraquinone-based acid dye, valued for its bright and stable violet hue. Its primary commercial value lies in its excellent wash and light fastness properties, making it a reliable choice for demanding coloration processes. This dye is essential for manufacturers in the textile and leather industries seeking high-performance colorants for nylon, silk, wool, and other protein-based fibers.

Application

• Primary dyeing of nylon, silk, and wool textiles.
• Coloration of leather goods, including apparel, footwear, and accessories.
• Printing inks for specialty applications on protein fibers.
• Used in the manufacture of paper for decorative and specialty grades.
• Potential applications in the coloration of anodized aluminum.
• Research and development of novel colorant systems.

Basic Information

Product Name	C.I. Acid Violet 121
CAS No.	71872-26-9
Molecular Formula	C28H20N4Na2O8S2
Molecular Weight	666.59 g/mol
Synonyms	Acid Violet 121; Acid Blue 324; C.I. 12195; Acid Violet RL; Acid Violet 5R; Acid Violet 121 (C.I.); Sodium 1-amino-4-[(4-ethoxyphenyl)amino]-9,10-dioxo-9,10-dihydroanthracene-2-sulphonate
EINECS	Contact for details

Quality Control

Our production of C.I. Acid Violet 121 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance. Every lot is tested against key parameters including color strength, shade, solubility, and impurity profile to meet precise customer specifications. Certificates of Analysis (COA) documenting these rigorous quality tests are available upon request.

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 incompatible materials. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Dark violet powder
Identification (IR)	Conforms
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to Standard
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm

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