Coumarin 337 TCI C3063

Chemical Identity

Other names: Coumarin 523 · 2,3,6,7-Tetrahydro-11-oxo-1H,5H,11H-[1]benzopyrano[6,7,8-ij]quinolizine-10-carbonitrile
CAS No.: 55804-68-7
PubChem: CID 72654·SID 253660944
Formula: C16H14N2O2
Molecular weight: 266.30 g/mol
Purity: >98.0%(HPLC)
Reference databases: ECHA

Full identifiers (IUPAC, SMILES, InChIKey)

IUPAC: 4-oxo-3-oxa-13-azatetracyclo[7.7.1.02,7.013,17]heptadeca-1,5,7,9(17)-tetraene-5-carbonitrile
SMILES: C1CC2=C3C(=C4C(=C2)C=C(C(=O)O4)C#N)CCCN3C1
InChIKey: LGDDFMCJIHJNMK-UHFFFAOYSA-N
MDL: MDL00051332

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Coumarin 337 is a fluorescent dye from the coumarin family, a class of compounds widely known as laser dyes and fluorescent labels. Its structure combines a coumarin core with a rigid, cyclized amine system and a nitrile group that withdraws electrons. This design produces strong intramolecular charge transfer when the molecule is excited. In the laboratory, Coumarin 337 is classed as a photonic and optical material. It is used in dye laser experiments, fluorescence spectroscopy, and research on light-emitting materials, where a well-defined fluorophore is needed.

Coumarin dyes are valued for their high fluorescence efficiency and for emitting in the visible region, especially from blue to green. In Coumarin 337, the amine is locked into a ring, which restricts free rotation. As a result, less excitation energy is lost through non-radiative pathways. The nitrile group shifts the dye's optical properties and makes it sensitive to the polarity of its surroundings, an effect known as solvatochromism. Researchers use this sensitivity to probe microenvironments in solutions, polymers, and organized systems such as micelles. Together, these traits make it a strong choice for optical and photophysical work.

In Indonesia, Coumarin 337 suits optics and photonics physics laboratories, as well as spectroscopy research groups in chemistry and physics departments. It also fits materials science teams that develop luminescent or optically active materials. AMI Scientific supplies this TCI product to universities, research institutes, and industrial R&D laboratories that need a dependable coumarin dye. Typical work includes teaching experiments, thesis projects, and advanced research on fluorescence behavior, laser media, and environment-sensitive probes.

Related TCI products

Dye laser experiments: Coumarin 337 belongs to the coumarin class of laser dyes, and its efficient fluorescence in the visible region makes it useful as an active medium in dye laser research and teaching.
Fluorescence spectroscopy: Its high fluorescence efficiency and well-defined emission make it a practical reference fluorophore for studying absorption, emission, and excited-state behavior in spectroscopy laboratories.
Solvatochromism and polarity studies: The nitrile group makes the dye sensitive to its surroundings, so its optical response can show how solvent polarity affects charge-transfer excited states.
Microenvironment probing in polymers and micelles: Because it responds to local polarity, the dye can report on microenvironments inside polymer matrices, solutions, and organized assemblies such as micelles.
Research on light-emitting materials: As a photonic and optical material that emits from blue to green, it supports the development and characterization of luminescent materials and optical devices.

Brand	TCI (product code C3063)
CAS number	55804-68-7
Molecular formula	—
Purity	—
Category	Materials Science > Photonic Materials and Optical Materials > Coumarin Dyes
Pack sizes	as listed on the product page; contact AMI Scientific to confirm availability
Physical form	refer to the manufacturer's certificate of analysis and safety data sheet
Storage	keep tightly closed and protected from light, following the manufacturer's label recommendations

Store Coumarin 337 in its original, tightly sealed container in a cool, dry place away from direct light, since fluorescent dyes can degrade under prolonged light exposure. Use amber glass or light-tight containers for prepared solutions, and label them with the solvent, concentration, and date. Handle the material in a well-ventilated area or fume hood. Wear gloves, safety glasses, and a lab coat, and avoid inhaling dust or letting it touch your skin. Keep it away from strong oxidizing agents. Always check the manufacturer's safety data sheet for specific storage temperature, hazard information, and disposal requirements before use.

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