2161-70-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2161-70-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,1,6 and 1 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 2161-70:
(6*2)+(5*1)+(4*6)+(3*1)+(2*7)+(1*0)=58
58 % 10 = 8
So 2161-70-8 is a valid CAS Registry Number.