Description

Direct Red 16 is a synthetic azo dye belonging to the direct dye class, valued for its strong affinity to cellulose fibers without the need for a mordant. Its primary commercial value lies in providing a cost-effective and vibrant red coloration with good wash-fastness properties. This product is essential for manufacturers in the textile, paper, and leather industries seeking reliable and consistent dyeing performance.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose, rayon, and other cellulosic fabrics.
• Paper Coloring: Used in the production of colored papers, tissues, and packaging materials.
• Leather Finishing: Imparts color to leather goods, including footwear, bags, and upholstery.
• Ink Formulation: Serves as a colorant in certain types of inks for stamping and marking.
• Biological Staining: May be used in specific histological or microbiological staining protocols.
• Educational & Research: Employed in laboratory settings for dye chemistry studies and experiments.

Basic Information

Product Name	Direct Red 16
CAS No.	6227-02-7
Molecular Formula	C26H17N5Na2O8S2
Molecular Weight	637.56 g/mol
Synonyms	Direct Fast Scarlet 4BA; Direct Scarlet 4BA; C.I. Direct Red 16; Direct Red 4B; Direct Red 16, disodium salt; Pontamine Fast Scarlet 4BA; Sirius Scarlet 4BA; Aizen Direct Fast Scarlet 4BH; Atul Direct Fast Scarlet 4BA; Benzo Scarlet 4BS; Chlorazol Fast Scarlet 4BA
EINECS	228-304-5

Quality Control

Our Direct Red 16 is manufactured under a stringent quality management system. Each batch undergoes comprehensive analytical testing, including identification, purity assay, and strength evaluation, to ensure it meets precise color index specifications and consistent performance. Certificates of Analysis (COA) detailing all test results are 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 incompatible materials and sources of ignition.

Specification

Item	Specification
Appearance	Reddish-brown powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Shade	Conforms to standard
Fastness Properties	Contact for details

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