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219757-45-6

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219757-45-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 219757-45-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,9,7,5 and 7 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 219757-45:
(8*2)+(7*1)+(6*9)+(5*7)+(4*5)+(3*7)+(2*4)+(1*5)=166
166 % 10 = 6
So 219757-45-6 is a valid CAS Registry Number.

219757-45-6Downstream Products

219757-45-6Relevant articles and documents

Four N-benzyl-substituted 2-ethyl-3-hydroxypyridin-4-ones

Burgess, John,Fawcett, John,Russell, David R.,Waltham, Emma

, p. 2011 - 2015 (2007/10/03)

The molecular structures of 1-benzyl-2-ethyl-3-hydroxypyridin-4-one hydrate [(1), C14H15NO2.H2O], 2-ethyl-3-hydroxy-1-(4-methylbenzyl)pyridin-4-one [(2), C15H17-NO2], 2-ethyl-1-(4-fluorobenzyl)-3-hydroxypyridin-4-one [(3), C14H14FNO2] and 2-ethyl-3-hydroxy-1-(4-trifluoromethylbenzyl)pyridin-4-one hemihydrate [(4), C15H14-F3NO2.0.5H2O] have been determined. The compounds all exhibit mutually hydrogen-bonded dimeric pairs. In the case of (1) and (2), the molecules of the dimer are symmetry related, while in (3) and (4), two independent molecules of the asymmetric unit are linked. For the hydrates (1) and (4), the dimeric pairs are linked by further hydrogen bonds through the water molecules.

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