4-(Dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran
4-(Dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran (CAS: 51325-91-8) is an organic compound with the formula C19H17N3O and a molecular weight of 303.36 g/mol. This fluorescent dye exhibits maximum absorption at 468 nm and is primarily utilised in scientific research, particularly within materials science and organic electronics for its photonic and optical properties.
- IUPAC
- DCM

Laser Dyes
This compound functions as a laser dye, known for its fluorescent properties. It is employed in research settings to investigate and develop new laser technologies.
Organic Electronics
The molecule is utilised in the field of organic and printed electronics. Its specific optical characteristics make it suitable for research into light-emitting diodes (LEDs) and other organic electronic devices.
Materials Science Research
As a functional organic material, it is applied in materials science research. Its properties are studied for potential applications in advanced optical and photonic materials.
| Molecular weight | 303.36 |
|---|---|
| Empirical formula | C19H17N3O |
| Composition | Dye content, 98% |
| Melting point | 215-220 °C(lit.) |


Hazard statements
- H228Flammable solid
- H315Causes skin irritation
- H319Causes serious eye irritation
- H332Harmful if inhaled
- H335May cause respiratory irritation
Precautionary statements
- P210Keep away from heat, sparks and open flames. No smoking
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | Eyeshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges |
|---|---|
| Flash point | 43 °C / 109.4 °F |
| Transport (UN / ADR) | UN 3175 4.1 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | F,Xn |
| Risk statements (R) | 11-20-36/37/38 |
| Safety statements (S) | 7/9-16-26-36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Absorption | λmax 468 nm |
|---|---|
| Oled Device Performance | ITO/Alq3:DCM/Alq3/Mg:Ag2• Color: red• Max. EQE: 1.3 %ITO/TPD/Alq3:DCM (10%)/Alq3/Mg:Ag3• Color: red• Max. Luminance: 150 Cd/m2 |
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 4-(Dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran used for?
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This compound is primarily used as a laser dye and in research within organic electronics and materials science due to its fluorescent and optical properties.
What is the CAS number and formula for 4-(Dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran?
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The CAS number is 51325-91-8, and its empirical formula is C19H17N3O.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this chemical with a dye content of 98%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
How should 4-(Dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran be handled?
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Handling requires caution due to flammability and potential irritation. Use appropriate personal protective equipment including eyeshields, gloves, and a particle respirator (N100 US / P1-P3 EN143). Ensure adequate ventilation and keep away from ignition sources. Refer to the Safety Data Sheet for full details.
How is 4-(Dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran shipped?
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This chemical is classified as UN 3175, Class 4.1, Packing Group II, and is exported in compliance with relevant transportation regulations.
How can I request a sample or quote?
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To request a sample or a quotation, please contact our sales department through the website or via direct inquiry, providing your specific requirements.
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