Description

Disperse Orange 3 is a synthetic organic dye belonging to the azo class, widely recognized for its vibrant orange hue. It is a critical component in the coloration of synthetic fibers, offering excellent dispersion properties and wash-fastness. This product is essential for manufacturers in the textile and plastics industries seeking reliable and consistent colorants for polyester, nylon, and acetate materials. Our supply of Disperse Orange 3 CAS NO 730-40-5 is backed by stringent quality control to ensure batch-to-batch uniformity for your production processes.

Application

• Primary dyeing and printing of polyester fibers and fabrics.
• Coloration of nylon and acetate textiles.
• Mass pigmentation of plastics and synthetic resins, including polystyrene and polycarbonate.
• Manufacturing of inks and toners for specialized printing applications.
• Production of colored masterbatches for the plastics compounding industry.
• Laboratory use as a stain or biological marker in research settings.

Basic Information

Product Name	Disperse Orange 3
CAS No.	730-40-5
Molecular Formula	C12H10N4O2
Molecular Weight	242.23 g/mol
Synonyms	1-(2,4-Dinitrophenylazo)-2-naphthol; C.I. Disperse Orange 3; Disperse Orange G; Celliton Orange G; Amacel Orange G; C.I. 11005; 2-Naphthol, 1-[(2,4-dinitrophenyl)azo]-; 1-(2,4-Dinitrophenylhydrazono)naphthalen-2-one
EINECS	211-984-8

Quality Control

Our Disperse Orange 3 is manufactured under a strict quality management system. Every batch is analyzed to confirm identity, purity, strength, and key physical properties such as dispersion stability and shade. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing results against our internal specifications. Our quality commitment ensures the product meets the performance requirements for industrial dyeing and plastics coloration.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from heat, sparks, and open flame. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 96.0%
Melting Point	210 - 215 °C
Moisture Content	≤ 1.0%
Ash Content	≤ 0.5%
Dispersion Stability	Passes test
Shade & Strength	Within agreed tolerance vs. standard

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