1668599-81-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1668599-81-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,6,8,5,9 and 9 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1668599-81:
(9*1)+(8*6)+(7*6)+(6*8)+(5*5)+(4*9)+(3*9)+(2*8)+(1*1)=252
252 % 10 = 2
So 1668599-81-2 is a valid CAS Registry Number.