77747-60-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 77747-60-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,7,4 and 7 respectively; the second part has 2 digits, 6 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 77747-60:
(7*7)+(6*7)+(5*7)+(4*4)+(3*7)+(2*6)+(1*0)=175
175 % 10 = 5
So 77747-60-5 is a valid CAS Registry Number.
77747-60-5Relevant articles and documents
Antipyrine Derivative with Heterocyclic Substituents, I: New Bipyrazolones
Stachel, Hans-Dietrich,Papenberg, Gerhard
, p. 65 - 71 (2007/10/02)
Starting from antipyroylketene acetal (1) and ethyl antipyroylacetate (8), the isomeric bipyrazolones 10b and 12b as well as their derivatives 10a, 11, 12a and 14 were prepared.The tautomerism of the bipyrazolones is discussed on the basis of their spectr
