138470-20-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 138470-20-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,4,7 and 0 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 138470-20:
(8*1)+(7*3)+(6*8)+(5*4)+(4*7)+(3*0)+(2*2)+(1*0)=129
129 % 10 = 9
So 138470-20-9 is a valid CAS Registry Number.
138470-20-9Relevant articles and documents
1,4-dicarbonyl, 1,4,7-tricarbonyl compounds and cyclopentenones from etacrynic acid
Gorlitzer,Bomeke
, p. 983 - 987 (2007/10/02)
The γ-nitroketones 2, 3, and 10 are prepared by Michael addition of nitroalkanes to etacrynic acid 1. The 1,4-dicarbonyl compounds 6 and 9 as well as the 1,4,7-triketone 11 are obtained from these substances by oxidation with KMnO4 in the prese