81931-05-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81931-05-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,9,3 and 1 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 81931-05:
(7*8)+(6*1)+(5*9)+(4*3)+(3*1)+(2*0)+(1*5)=127
127 % 10 = 7
So 81931-05-7 is a valid CAS Registry Number.
InChI:InChI=1/C20H30N4/c1-23(2,3)15-17-9-7-11-19(13-17)21-22-20-12-8-10-18(14-20)16-24(4,5)6/h7-14H,15-16H2,1-6H3/q+2/b22-21+