Description

C.I. Acid Orange 78 is a synthetic monoazo acid dye widely used for its strong and vibrant orange hue. This dye is valued for its good lightfastness and wash fastness properties, making it suitable for demanding coloration applications. It is primarily utilized in the textile industry for dyeing protein fibers like wool, silk, and nylon, as well as in the leather and paper industries.

Application

• Primary dyeing of wool and silk fabrics and yarns.
• Coloration of nylon fibers and textiles.
• Leather dyeing for footwear, apparel, and upholstery.
• Paper coloring for specialty and decorative papers.
• Ink formulation for specific printing applications.
• As a colorant for certain types of anodized aluminum.

Basic Information

Product Name	C.I. Acid Orange 78
CAS No.	12234-92-3
Molecular Formula	C16H11N4NaO4S
Molecular Weight	378.34 g/mol
Synonyms	Acid Orange 78; Acid Orange GS; Acid Orange AGS; C.I. 18830; 2-Naphthalenesulfonic acid, 7-hydroxy-8-[(2-methoxy-5-methyl-4-sulfophenyl)azo]-, monosodium salt; Sodium 7-hydroxy-8-[(2-methoxy-5-methyl-4-sulfophenyl)azo]naphthalene-2-sulfonate
EINECS	Contact for details

Quality Control

Our C.I. Acid Orange 78 is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance. The product undergoes rigorous testing for key parameters including color strength, shade, solubility, and impurity profile. Certificates of Analysis (COA) detailing purity and 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. The container must be kept tightly closed to prevent moisture absorption and contamination.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to standard
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
Solubility in Water	Conforms
pH (1% Solution)	6.0 - 8.0

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