81769-17-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81769-17-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,7,6 and 9 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 81769-17:
(7*8)+(6*1)+(5*7)+(4*6)+(3*9)+(2*1)+(1*7)=157
157 % 10 = 7
So 81769-17-7 is a valid CAS Registry Number.