Description

Orange G is a synthetic, water-soluble azo dye widely recognized for its vibrant orange-yellow color. This high-purity dye is essential for applications requiring consistent, reliable color performance and excellent lightfastness. It is a critical component for manufacturers in the textile, biological staining, and food colorant industries, where precise color matching and quality are paramount.

Application

• Biological Staining: Primarily used as a counterstain in histological procedures, such as the Papanicolaou (Pap) stain, to provide contrast and highlight specific cellular structures.
• Textile Dyeing: Employed for dyeing protein fibers like wool, silk, and nylon, offering good wash and light fastness.
• Food Coloring (where permitted): Used as a color additive (E110) in certain food and beverage products, subject to regional regulatory approval.
• Ink & Pigment Manufacturing: Serves as a colorant for inks, paper, and other specialty pigments.
• Laboratory Reagent: Utilized in various analytical and research applications as a pH indicator or tracer dye.
• Cosmetics: Occasionally used in the formulation of soaps and other cosmetic products for coloration.

Basic Information

Product Name	Orange G
CAS No.	1936-96-5
Molecular Formula	C16H10N2Na2O7S2
Molecular Weight	452.37 g/mol
Synonyms	Acid Orange 10; C.I. 16230; E110; Food Orange 3; Orange G Sodium Salt; 7-Hydroxy-8-(phenylazo)-1,3-naphthalenedisulfonic Acid Disodium Salt; Wool Orange; Hexacert Orange G
EINECS	217-705-6

Quality Control

Our Orange G is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. We provide comprehensive Certificates of Analysis (COA) for every shipment, detailing key parameters such as assay, dye content, and impurity profiles. Our quality control protocols are designed to meet the stringent requirements of biological staining and industrial applications.

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 and sources of ignition.

Specification

Item	Specification
Appearance	Orange to red-brown powder
Identification (IR)	Conforms to standard
Assay (Dye Content)	≥ 85%
Loss on Drying	≤ 5.0%
Water Insoluble Matter	≤ 0.2%
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.