7-Diethylamino-4-methylcoumarin CAS#91-44-1

  • Bright blue-violet fluorescent whitening agent & laser dye, strong fluorescence quantum yield under UV excitation

  • Excellent light stability, low photobleaching rate for long-term fluorescent marking applications

  • Good solubility in organic solvents, compatible with plastics, coatings, inks, resins and polymer systems

  • High purity powder with sharp absorption & emission peak, consistent fluorescent performance batch to batch

  • Widely used as fluorescent brightener, fluorescent tracer, dye laser medium and optical brightener

  • Suitable for PS, PVC, PET, coatings, printing ink, security marking and analytical chemistry

  • Low impurity content, stable storage property under dry and dark conditions

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Products Description

7-Diethylamino-4-methylcoumarin is an important organic fluorescent compound with a wide range of applications, particularly as a fluorescent brightening agent in the textile and paper industries. It is used to enhance the whiteness and brightness of various materials, improving their overall visual appearance. Its practical applications demonstrate its effectiveness in increasing the luminosity of different industrial products.

In scientific research, 7-Diethylamino-4-methylcoumarin is widely studied for its distinctive photophysical and fluorescence properties, making it a valuable compound in the development of fluorescence-based analytical techniques. Its well-defined molecular structure and consistent product quality support reliable performance in both industrial and laboratory applications.

Key characteristics of this compound include its yellow appearance, good solubility in organic solvents, and characteristic light absorption and emission spectra. These properties make it a useful fluorophore for applications in fluorescence research, analytical chemistry, and optical materials development.

7-Diethylamino-4-methylcoumarin

Chemical Properties

Melting point 

72-75 °C (lit.)

Boiling point 

240 °C / 6.5mmHg

density 

1.122

vapor pressure 

0-0.003Pa at 20-25℃

refractive index 

1.5300 (estimate)

Fp 

152°C

storage temp. 

Sealed in dry,Room Temperature

solubility 

Chloroform (Slightly), Methanol (Slightly)

pka

3.51±0.20(Predicted)

form 

Crystalline Powder

color 

Light beige to light purple

Water Solubility 

slightly soluble

BRN 

193303

Stability:

Stable. Incompatible with strong oxidizing agents.

InChIKey

AFYCEAFSNDLKSX-UHFFFAOYSA-N

LogP

2.523-2.8 at 23-25℃

CAS DataBase Reference

91-44-1(CAS DataBase Reference)

NIST Chemistry Reference

Coumarin, 7-(diethylamino)-4-methyl-(91-44-1)

EPA Substance Registry System

7-Diethylamino-4-methylcoumarin (91-44-1)

Safety Information

Hazard Codes 

Xn

Risk Statements 

36/37/38-20/21

Safety Statements 

37/39-26

WGK Germany 

2

RTECS 

GN6370000

TSCA 

Yes

HS Code 

29322090

Hazardous Substances Data

91-44-1(Hazardous Substances Data)

Toxicity

LD50 oral in rat: 5gm/kg

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