Description

Ethyl Orange is an azo dye compound widely used as a versatile colorimetric indicator and biological stain. Its primary value lies in its distinct and reversible color change in response to pH, making it an essential tool for analytical chemistry and life science research. This product is critical for professionals in industrial quality control laboratories, academic research institutions, and manufacturers of diagnostic kits who require reliable and consistent pH indicators.

Application

• pH Indicator: Used in titrations and analytical chemistry procedures to determine endpoint detection across specific pH ranges.
• Biological Staining: Employed in histology and microscopy for staining cellular components and tissues in biological research.
• Textile Dyeing: Serves as a colorant for dyeing natural and synthetic fibers in small-scale or specialized textile applications.
• Laboratory Reagent: Formulated into standard solutions and test kits for educational and industrial laboratory use.
• Chemical Research: Acts as a model compound or intermediate in synthetic organic chemistry and photochemical studies.
• Inks and Coatings: Utilized in the formulation of specialized inks, dyes, and coatings where specific color properties are required.

Basic Information

Product Name	Ethyl Orange
CAS No.	13545-67-0
Molecular Formula	C14H15N3O3S
Molecular Weight	305.35 g/mol
Synonyms	Ethyl Orange; Ethyl Orange sodium salt; Acid Orange 20; Tropaeolin D; 4-[(4-Diethylaminophenyl)diazenyl]benzenesulfonic acid sodium salt; Sodium 4-[(4-diethylaminophenyl)diazenyl]benzenesulfonate; C.I. 14645; Trophaeolin D
EINECS	Contact for details

Quality Control

Our Ethyl Orange is produced under a rigorous quality management system. Each batch undergoes comprehensive analytical testing, including identification, purity assay, and impurity profiling, to ensure it meets stringent specifications for use in sensitive applications. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee traceability and compliance with your quality standards.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (typically 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 structure
Assay (HPLC)	≥ 95.0%
pH (1% Solution)	Within specified range
Loss on Drying	≤ 2.0%
Heavy Metals	≤ 20 ppm
Solubility	Soluble in water, ethanol

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