27425-55-4

Basic information

• Product Name: COUMARIN 7
• Synonyms: 3-(1H-benzimidazol-2-yl)-7-(diethylamino)-2H-1-Benzopyran-2-one;3-(Benzimidazol-2-yl)-7-diethylaminocoumarin;Coumarin 7, laser grade, pure, 99%;Solvent Yellow 10G;2H-1-Benzopyran-2-one, 3-(1H-benzimidazol-2-yl)-7-(diethylamino)-;FLUORESCENT YELLOW 10G(S-YELLOW 185);Fluorescent Yellow 10G;S-Yellow 185
• CAS NO: 27425-55-4
• Molecular Formula: C₂₀H₁₉N₃O₂
• Molecular Weight: 333.38
• EINECS: 248-451-4
• Product Categories: Solvent Dyestuff
• Mol File: 27425-55-4.mol
• Article Data: 10

Chemical Properties

• Melting Point: 234-237 °C(lit.)
• Boiling Point: 470.35°C (rough estimate)
• Flash Point: 318.044 °C
• Appearance: Bright yellow/Powder
• Density: 1.2071 (rough estimate)
• Vapor Pressure: 1.85E-14mmHg at 25°C
• Refractive Index: 1.6200 (estimate)
• Storage Temp.: -20°C
• PKA: 10.83±0.10(Predicted)
• CAS DataBase Reference: COUMARIN 7(CAS DataBase Reference)
• NIST Chemistry Reference: COUMARIN 7(27425-55-4)
• EPA Substance Registry System: COUMARIN 7(27425-55-4)

Safety Data

• Hazard Codes: Xi,Xn
• Statements: 36/37/38-20/21/22
• Safety Statements: 26-38-37/39
• WGK Germany: 3
• Hazardous Substances Data: 27425-55-4(Hazardous Substances Data)

Usage

Description

COUMARIN 7, also known as benzoαpyrone, is a naturally occurring laser dye that is typically found in nature. It is characterized by its brilliant yellow appearance and bluish shade. COUMARIN 7 possesses several properties, including heat resistance of at least 260°C, light fastness of 5-6, and varying degrees of acid, alkali, and water resistance. It has a density of 1.20 g/cm3 and a maximum of 5.0% residue on an 80 mesh. The dye also has a tinting strength of 100-105% and a maximum of 50ppm for weight metal total. COUMARIN 7 is a bright yellow powder in its chemical form.

Uses

Used in Dye Industry:
COUMARIN 7 is used as a laser dye for its brilliant yellow appearance and bluish shade. Its properties, such as heat resistance, light fastness, and resistance to acids, alkalis, and water, make it suitable for various applications in the dye industry.
Used in Metabolite Research:
COUMARIN 7 is also used in the study of dyes and metabolites, contributing to the understanding of their properties and potential applications in various fields.

Flammability and Explosibility

Nonflammable

TEST ITEMS

SPECIFICATION

HEAT RESISTANCE

260 °C min

LIGHT FASTNESS

5-6

ACID RESISTANCE

4

ALKALI RESISTANCE

5

DENSITY

1.20 g/cm 3

RESIDUE ON 80 MESH

5.0% max

VOLATITE 105 °C

1.0% max

WEIGHT METAL TOTAL

50ppm max

InChI:InChI=1/C20H19N3O2/c1-3-23(4-2)14-10-9-13-11-15(20(24)25-18(13)12-14)19-21-16-7-5-6-8-17(16)22-19/h5-12H,3-4H2,1-2H3,(H,21,22)

Upstream product

• 91-68-9 3-diethylaminophenol 
• 88-74-4 2-nitro-aniline 
• 57597-64-5 7-diethylaminocoumarine-3-aldehyde 
• 20571-42-0 7-diethylamino-2H-benzopyran-2-one 
• 95-54-5 1,2-diamino-benzene 
• 4414-88-4 1H-benzimidazol-2-acetonitrile 
• 17754-90-4 4-(Diethylamino)salicylaldehyde 
• 1413922-74-3 5,5-dimethyl-2-{5-(9-diethylamino-5H-7-oxa-4b,6,13-triazaindeno[2,1-a]anthracen-5-yl)thiophen-2-yl}-1,3-dioxane 
• 105-53-3 diethyl malonate 
• 105-56-6 ethyl 2-cyanoacetate 
• 17754-91-5 3-(1H-benzimidazol-2-yl)-N,N-diethyl-2-imine-2H-1-benzopyran-7-amine 
• 23764-68-3 5-Diethylamino-2-{[(E)-4-nitro-phenylimino]-methyl}-phenol 

Relevant articles and documents

Fluorescent probe for selectively identifying fluorine ions and preparation method thereof

The invention discloses a fluorescent probe capable of selectively identifying fluoride ions and a preparation method thereof. It uses coumarin as a fluorescent group, and further widens the functionality of the fluorescent group as a fluorescent group. A benzimidazole group containing different substituents is modified on the coumarin fluorescent group, H of the imidazole ring and the carbonyl oxygen of coumarin form intramolecular hydrogen bonds to maintain the planarity of the molecule. Ferroelectric negative electrode using fluoride ion Due to the high charge density, fluorine passes through hydrogen bonds with hydrogen on the imidazole ring, the original intramolecular hydrogen bonding is broken, and the intramolecular structure changes. The synthesized compound 10 has good selectivity and faster response speed for fluoride ions as a fluorescent probe, and the detection limit is 3 . 50μmol/L.

Facile synthesis and fluorescent properties of coumarin-7 and its isomer 4-(2-benzimidazolyl)-7-(diethylamino)coumarin

Coumarin-7 and its isomer 4-(2-benzimidazolyl)-7-(diethylamino)coumarin were synthesised using condensation of the corresponding formylcoumarin with o-phenylenediamine as the key step. Moreover, absorption and fluorescence emission spectra of these two coumarins were recorded.

A secondary battery pack

PROBLEM TO BE SOLVED: To provide a secondary battery pack capable of securing its safety even though an electrolyte is leaked out from a secondary battery. SOLUTION: The secondary battery pack 20 houses a battery pack 11, in which 7 sets of secondary batteries 4 are arranged like stacked straw bags of two steps of upper and lower sides and a series of spot welding is applied on a metal cap of the secondary battery, or a battery case bottom and metal connection plates 5, 6 served as one electrode, in an insulation case 12 formed by a deep insulation lower case 3 and a deep insulation upper case 2. Therefore, even though the electrolyte is leaked out from the secondary battery 4 forming the battery pack 11, leakage of the electrolyte to the outside can be prevented. COPYRIGHT: (C)2009,JPOandINPIT