Description

Coumarin 343 CAS NO 55804-65-4 is a high-purity laser dye and fluorescent tracer belonging to the coumarin family of organic compounds. This compound is valued for its excellent photostability, high fluorescence quantum yield, and tunable emission properties in the green-yellow spectral region. It is essential for researchers and manufacturers in the fields of analytical chemistry, photonics, and advanced material science who require reliable and consistent fluorescent markers or gain media.

Application

• Laser Dye: Used as an active medium in tunable dye lasers, particularly for applications requiring emission in the green to yellow wavelength range.
• Fluorescent Tracer & Probe: Employed in biochemical and analytical research for labeling, detection, and fluorescence microscopy due to its bright and stable emission.
• Photovoltaic & OLED Research: Serves as a model compound or dopant in the development of organic light-emitting diodes (OLEDs) and dye-sensitized solar cells (DSSCs).
• Sensor Development: Utilized in the fabrication of chemical and biological sensors that rely on fluorescence signaling.
• Fluorescence Standards: Acts as a reference standard for calibrating fluorescence spectrometers and validating analytical methods.
• Material Science: Incorporated into polymers and coatings to study energy transfer processes or to create functional fluorescent materials.

Basic Information

Product Name	Coumarin 343
CAS No.	55804-65-4
Molecular Formula	C₂₀H₂₀N₂O₅
Molecular Weight	368.39 g/mol
Synonyms	Coumarin 343; 7-Diethylamino-4-methylcoumarin-3-carboxylic acid; C343; 3-Carboxy-7-diethylaminocoumarin; 7-(Diethylamino)-4-methyl-2-oxo-2H-chromene-3-carboxylic acid; 2H-1-Benzopyran-3-carboxylic acid, 7-(diethylamino)-4-methyl-2-oxo-; Laser dye C343; Coumarin 3-carboxylic acid, 7-diethylamino-4-methyl-
EINECS	Contact for details

Quality Control

Our Coumarin 343 is produced under strict quality management protocols. Each batch undergoes comprehensive analytical testing, including HPLC for purity verification and spectroscopic methods for identity confirmation, to ensure it meets the high standards required for research and industrial applications. A Certificate of Analysis (COA) detailing specific results is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). This material is light-sensitive (store away from light) and easily oxidized (store under inert atmosphere); prolonged exposure to air, light, or elevated temperatures should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Yellow to orange crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Fluorescence Emission Max	~503 nm (in ethanol)
Extinction Coefficient	Contact for details

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