1217685-81-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1217685-81-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,1,7,6,8 and 5 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1217685-81:
(9*1)+(8*2)+(7*1)+(6*7)+(5*6)+(4*8)+(3*5)+(2*8)+(1*1)=168
168 % 10 = 8
So 1217685-81-8 is a valid CAS Registry Number.