Description

Aniline Blue, Orange G is a synthetic, water-soluble azo dye belonging to the acid dye class, identified by CAS No. 6287-15-6. This compound is valued for its bright orange hue and strong affinity for protein-based fibers, making it a critical component for precise coloration in demanding industrial applications. It is primarily utilized by manufacturers in the textile, biological staining, and ink formulation sectors where consistent color fastness and purity are paramount.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers to achieve vibrant, wash-fast orange shades.
• Biological Staining: Used as a contrast stain in histological techniques, such as in Masson's trichrome stain, for differentiating tissue components under microscopy.
• Ink Manufacturing: A key pigment for producing inks in pens, printers, and specialty marking applications requiring high color intensity.
• Leather Coloring: Employed in the tanning industry to dye leather goods with a uniform and durable orange color.
• Paper Industry: Used for tinting paper products, including decorative papers and security documents.
• Food Colorant (where approved): In specific regulated grades, it can be used as a color additive for food and cosmetics.
• Laboratory Reagent: Serves as a pH indicator and a colored marker in various analytical and research procedures.

Basic Information

Product Name	Aniline Blue, Orange G
CAS No.	6287-15-6
Molecular Formula	C₁₆H₁₀N₂Na₂O₇S₂
Molecular Weight	452.37 g/mol
Synonyms	Acid Orange 10; C.I. 16230; Orange G; Wool Orange G; Acid Orange G; Eosin Scarlet; Kiton Orange G; Lissamine Orange G; Hexacol Orange G; Aniline Blue, Orange G (Histological stain component)
EINECS	228-510-1

Quality Control

Every batch of Aniline Blue, Orange G is manufactured and tested under a strict quality management system to ensure it meets the high standards required for industrial and laboratory use. We provide comprehensive Certificates of Analysis (COA) that detail purity, strength, and impurity profiles. Our quality protocols are designed to support compliance with relevant industry specifications, including those for biological stains and colorant purity.

Storage

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

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 85% (Dye content)
Loss on Drying	Max. 5.0%
Water Solubility	Freely soluble
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	Max. 20 ppm
Absorbance (λ max)	Conforms

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