81690-22-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81690-22-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,6,9 and 0 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 81690-22:
(7*8)+(6*1)+(5*6)+(4*9)+(3*0)+(2*2)+(1*2)=134
134 % 10 = 4
So 81690-22-4 is a valid CAS Registry Number.