Description

Acid Red 219 is a synthetic organic dye belonging to the azo class, valued for its vibrant red color and good fastness properties. This high-performance dye is engineered for applications requiring excellent color strength and stability. It is primarily utilized by manufacturers in the textile, leather, and specialty ink industries for dyeing and printing processes.

Application

• Primary dyeing of nylon and polyamide fibers.
• Coloration of leather goods, including footwear and upholstery.
• Manufacturing of inks for ballpoint pens, stamp pads, and other specialty writing instruments.
• Dyeing of paper and paper products for decorative purposes.
• Potential use as a colorant for certain plastics and synthetic materials.
• Research and development applications in analytical chemistry and laboratory staining.

Basic Information

Product Name	Acid Red 219
CAS No.	61724-36-5
Molecular Formula	C24H20N4Na2O8S2
Molecular Weight	618.55 g/mol
Synonyms	Acid Red 219; C.I. 17055; Acid Leather Red 2B; Nylosan Red F-2B; Acid Fast Red 2B; Acid Brilliant Red 2B; 2-Naphthalenesulfonic acid, 7-[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-1,3,6-trisulfo-, sodium salt (1:?); (Contact for full stoichiometric ratio)
EINECS	Contact for details

Quality Control

Our Acid Red 219 is produced under a stringent quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against key parameters including color strength, shade, solubility, and impurity profile. Certificates of Analysis (COA) documenting purity and physical specifications are available upon request 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 incompatible materials. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Red to dark red powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 5% (vs. Standard)
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Ash Content	≤ 1.0%

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