163981-05-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 163981-05-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,3,9,8 and 1 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 163981-05:
(8*1)+(7*6)+(6*3)+(5*9)+(4*8)+(3*1)+(2*0)+(1*5)=153
153 % 10 = 3
So 163981-05-3 is a valid CAS Registry Number.