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943-16-8

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943-16-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 943-16-8 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 9,4 and 3 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 943-16:
(5*9)+(4*4)+(3*3)+(2*1)+(1*6)=78
78 % 10 = 8
So 943-16-8 is a valid CAS Registry Number.

943-16-8Downstream Products

943-16-8Relevant articles and documents

Syntheses, Absorption and Fluorescence Spectra of 7-Hydroxy-3-pyridylcoumarins, their Esters, Ethers, and Quaternized Derivatives

Wolfbeis, Otto S.,Marhold, Harry

, p. 3664 - 3672 (2007/10/02)

7-Hydroxycoumarins 4 with a 2-, 3- or 4-pyridyl substituent in position 3, their ethers (3), esters (5, 6), and quaternized derivatives (7-9) have been synthesized by a generally applicable method starting from 2-hydroxy-4-methoxybenzaldehyde (1).The absorption and fluorescence spectra in methanol and water of different pH values are reported, and the effects of substituents on spectra and pKa values are discussed.

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