Description

Direct Red 227 is a synthetic azo dye belonging to the direct dye class, valued for its strong affinity to cellulosic fibers. This compound is engineered to deliver excellent wash and light fastness properties, making it a critical component for achieving durable and vibrant coloration. It is primarily utilized by manufacturers in the textile, paper, and leather industries for dyeing and printing applications where deep, consistent red shades are required.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose, rayon, and other cellulosic fabrics to achieve a range of red hues.
• Paper Coloring: Used in the production of colored papers, tissues, and paperboard where color uniformity is essential.
• Leather Finishing: Employed in the dyeing of leather goods, providing rich color penetration and good fastness.
• Ink Formulation: A key pigment for manufacturing inks used in specialty printing and packaging.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.

Basic Information

Product Name	Direct Red 227
CAS No.	12222-51-4
Molecular Formula	C32H21N7Na2O10S2
Molecular Weight	789.66 g/mol
Synonyms	Direct Fast Scarlet 4BS; C.I. Direct Red 227; Direct Scarlet 4BS; Pontamine Scarlet 4BS; Benzo Scarlet 4BS; Sirius Scarlet 4BS; Direct Red 4BS; 1,3-Naphthalenedisulfonic acid, 7-[[4-[[4-[(2,4-diaminophenyl)azo]phenyl]amino]-6-sulfo-1-naphthalenyl]azo]-4-hydroxy-, disodium salt
EINECS	Contact for details

Quality Control

Our Direct Red 227 is produced under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. Each lot is tested against key parameters including color strength, shade, solubility, and impurity profile. A comprehensive Certificate of Analysis (COA) documenting purity, physical properties, and conformance to specification is provided with every shipment.

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

Specification

Item	Specification
Appearance	Red to dark red powder
Identification (IR)	Conforms
Color Strength	100 ± 3% (Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
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.