Description

C.I. Acid Orange 142 is a synthetic azo dye belonging to the acid dye class, valued for its bright orange hue and good fastness properties. This high-performance colorant is essential for achieving durable and vibrant coloration on protein-based fibers like wool, silk, and nylon. It is a critical material for manufacturers in the textile, leather, and paper industries seeking reliable and consistent dyeing results.

Application

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

Basic Information

Item	Detail
Product Name	C.I. Acid Orange 142
CAS No.	61901-39-1
Molecular Formula	C32H24N8Na2O8S2
Molecular Weight	758.68 g/mol
Synonyms	Acid Orange 142; Acid Orange A; C.I. 24895; Acid Leather Orange RL; Acid Fast Orange RL; Nylosan Orange E-RL; Telon Orange RL; Supranol Orange RL; Dermacid Orange RL
EINECS	Contact for details

Quality Control

Our C.I. Acid Orange 142 is manufactured under a strict quality management system. Every batch is tested to ensure consistent shade, strength, and purity, meeting the specifications required for industrial dyeing applications. Certificates of Analysis (COA) detailing key parameters such as color strength, solubility, and fastness properties are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture.

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	≤ 1.0%
pH (1% Solution)	6.0 - 8.0
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.