1217662-99-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1217662-99-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,1,7,6,6 and 2 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1217662-99:
(9*1)+(8*2)+(7*1)+(6*7)+(5*6)+(4*6)+(3*2)+(2*9)+(1*9)=161
161 % 10 = 1
So 1217662-99-1 is a valid CAS Registry Number.