Description

Direct Orange 57 is a synthetic azo dye belonging to the direct dye class, known for its strong affinity for cellulosic fibers. This product is valued for its ability to produce vibrant, wash-fast orange shades directly onto materials like cotton, viscose, and paper without the need for a mordant. It is essential for manufacturers in the textile dyeing, paper coloring, and leather finishing industries seeking efficient and economical color solutions.

Application

• Textile Dyeing: Primary application for dyeing cotton, rayon, and other cellulosic fibers to achieve bright orange hues.
• Paper Coloring: Used in the production of colored papers, tissues, and packaging materials.
• Leather Finishing: Imparts color to leather goods in the tanning industry.
• Ink Formulation: A colorant component for certain types of inks and toners.
• Wood Staining: Applied for coloring wood and related products.
• Biological Staining: Potential use as a histological stain in laboratory settings.

Basic Information

Product Name	Direct Orange 57
CAS No.	12235-80-2
Molecular Formula	C32H20N6Na4O13S4
Molecular Weight	956.80 g/mol
Synonyms	Direct Orange 57; C.I. Direct Orange 57; Direct Orange G; Direct Orange SG; Direct Fast Orange SG; Direct Orange 57 (C.I. 29150); Benzoic acid, 5-[[4'-[(2,4-diaminophenyl)azo][1,1'-biphenyl]-4-yl]azo]-2-hydroxy-3,6-disulfo-, tetrasodium salt; Tetrasodium 5-({4'-[(2,4-diaminophenyl)diazenyl]-[1,1'-biphenyl]-4-yl}diazenyl)-2-hydroxy-3,6-disulfonatobenzoate
EINECS	Contact for details

Quality Control

Our Direct Orange 57 is manufactured 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) detailing the results for purity, heavy metals, and other relevant specifications are provided with every shipment to guarantee compliance with your application requirements.

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	Orange to reddish-brown powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 50 ppm
Assay (HPLC)	≥ 90%

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