216685-83-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 216685-83-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,6,6,8 and 5 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 216685-83:
(8*2)+(7*1)+(6*6)+(5*6)+(4*8)+(3*5)+(2*8)+(1*3)=155
155 % 10 = 5
So 216685-83-5 is a valid CAS Registry Number.