Description

Propyl Red is a synthetic azo dye belonging to the class of pH indicators and biological stains. This compound is valued for its precise colorimetric properties and consistent performance in analytical and research applications. It is primarily utilized by professionals in life sciences, industrial quality control, and chemical manufacturing for staining, pH indication, and as a tracer dye.

Application

• pH Indicator: Used in analytical chemistry and titration procedures to visually determine pH endpoints in specific ranges.
• Biological Staining: Employed in histological and cytological preparations for staining tissues and cellular structures in microscopy.
• Industrial Tracer: Functions as a colorant or tracer dye in various industrial processes for flow visualization and leak detection.
• Research & Development: Serves as a reagent in laboratory research, particularly in biochemistry and molecular biology experiments.
• Educational Demonstrations: Used in academic settings for teaching principles of acid-base chemistry and colorimetric analysis.

Basic Information

Product Name	Propyl Red
CAS No.	2641-01-2
Molecular Formula	C18H20N2O2
Molecular Weight	296.37 g/mol
Synonyms	Propyl Red; C.I. Solvent Red 23; 1-(4-Phenylazophenylazo)-2-naphthol; 4-Phenylazo-4'-(phenylazo)diphenylamine; Oil Red; Sudan Red G; C.I. 26100; Fat Red B
EINECS	220-150-8

Quality Control

Our Propyl Red is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and performance consistency. Certificates of Analysis (COA) detailing specifications and test results are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at controlled room temperature (15-25°C). Keep away from incompatible materials and sources of ignition.

Specification

Item	Specification
Appearance	Dark red to brown powder or crystals
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Solubility	Soluble in organic solvents (e.g., ethanol, acetone)
pH Transition Range	Contact for details

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