Description

Direct Orange S is a synthetic azo dye belonging to the direct dye class, valued for its ability to color cellulose fibers like cotton and paper without the need for a mordant. Its primary commercial significance lies in providing a cost-effective and straightforward dyeing process for textiles, resulting in good wash and light fastness properties. This product is essential for manufacturers in the textile, paper, and leather industries seeking efficient and vibrant orange coloration.

Application

• Primary dyeing of cotton and other cellulosic fibers in the textile industry.
• Coloration of paper products, including specialty papers and packaging.
• Dyeing of leather goods to achieve consistent orange hues.
• Used in the formulation of ink for specific printing applications.
• Potential use as a colorant in the production of wood stains and coatings.

Basic Information

Product Name	Direct Orange S
CAS No.	3626-36-6
Molecular Formula	C32H21N5Na2O8S2
Molecular Weight	733.65 g/mol
Synonyms	Direct Orange S; C.I. Direct Orange 26; Direct Fast Orange S; Direct Orange 26; Pontamine Orange S; Benzo Orange S; Chlorazol Orange S; Diazol Orange S; Sirius Orange S
EINECS	222-852-7

Quality Control

Our Direct Orange S is produced under a stringent quality management system to ensure batch-to-batch consistency and performance. Each lot undergoes comprehensive analysis, including strength, shade, and solubility testing, to meet industry specifications for direct dyes. A Certificate of Analysis (COA) detailing purity, physical properties, and performance characteristics 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed when not in use to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to standard
Assay (Color Strength)	≥ 95% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Shade	Within agreed tolerance
Solubility in Water	Conforms

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