216968-81-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 216968-81-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,6,9,6 and 8 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 216968-81:
(8*2)+(7*1)+(6*6)+(5*9)+(4*6)+(3*8)+(2*8)+(1*1)=169
169 % 10 = 9
So 216968-81-9 is a valid CAS Registry Number.