Description

Crocein Orange G is a synthetic, water-soluble azo dye known for its vibrant orange hue. This high-purity colorant is valued for its excellent tinctorial strength and good light and wash fastness properties. It is primarily utilized in the textile, paper, and leather industries for dyeing and printing applications, where consistent color quality and performance are critical.

Application

• Textile Dyeing: Used for dyeing cotton, wool, silk, and nylon fibers to achieve bright orange shades.
• Paper Coloring: Imparts color to various paper products, including tissue, packaging, and specialty papers.
• Leather Finishing: Applied in the dyeing of leather goods for footwear, apparel, and upholstery.
• Ink Formulation: A key component in the manufacture of inks for writing, printing, and stamping.
• Biological Staining: Employed as a histological stain in laboratory settings for microscopic analysis.
• Indicator Applications: Can be used as a pH indicator in certain analytical and educational contexts.

Basic Information

Product Name	Crocein Orange G
CAS No.	1934-20-9
Molecular Formula	C16H10N2Na2O7S2
Molecular Weight	452.37 g/mol
Synonyms	Acid Orange 10; C.I. 16230; Crocein Scarlet 3G; Eosin Scarlet; Food Orange 3; Orange G; Wool Orange G; 2,7-Naphthalenedisulfonic acid, 4-hydroxy-3-[(2-methoxyphenyl)azo]-, disodium salt
EINECS	217-705-4

Quality Control

Our Crocein Orange G is manufactured under a strict quality management system. Each batch is analyzed to ensure it meets precise specifications for color strength, purity, and solubility. A comprehensive Certificate of Analysis (COA) detailing parameters such as assay, heavy metal content, and identification is provided to guarantee consistent performance and supply reliability for your industrial processes.

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.

Specification

Item	Specification
Appearance	Orange to red-brown powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 85% (as dye content)
Loss on Drying	≤ 5.0 %
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
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.