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

Chemical Properties

bright yellow powder

Uses

Coumarin is also known as benzoαpyrone. Coumarin 7 is a laser dye that is usually found in the nature. Dyes and metabolites.

Flammability and Explosibility

Nonflammable

Properties and Applications

TEST ITEMS SPECIFICATION APPEARANCE BRILLIANT YELLOW SHADE BLUISH HEAT RESISTANCE 260 °C min LIGHT FASTNESS 5-6 ACID RESISTANCE 4 ALKALI RESISTANCE 5 WATER RESISTANCE 5 DENSITY 1.20 g/cm 3 RESIDUE ON 80 MESH 5.0% max WATER SOLUBLE 1.0% max VOLATITE 105 °C 1.0% max TINTING STRENGTH 100-105 % WEIGHT METAL TOTAL 50ppm max

TEST ITEMS

SPECIFICATION

APPEARANCE

BRILLIANT YELLOW

SHADE

BLUISH

HEAT RESISTANCE

260 °C min

LIGHT FASTNESS

5-6

ACID RESISTANCE

4

ALKALI RESISTANCE

5

WATER RESISTANCE

5

DENSITY

1.20 g/cm 3

RESIDUE ON 80 MESH

5.0% max

WATER SOLUBLE

1.0% max

VOLATITE 105 °C

1.0% max

TINTING STRENGTH

100-105 %

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

• 57597-64-5 7-diethylaminocoumarine-3-aldehyde 
• 95-54-5 1,2-diamino-benzene 
• 20571-42-0 7-diethylamino-2H-benzopyran-2-one 
• 88-74-4 2-nitro-aniline 
• 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 
• 91-68-9 3-diethylaminophenol 
• 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