1620646-31-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1620646-31-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,2,0,6,4 and 6 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1620646-31:
(9*1)+(8*6)+(7*2)+(6*0)+(5*6)+(4*4)+(3*6)+(2*3)+(1*1)=142
142 % 10 = 2
So 1620646-31-2 is a valid CAS Registry Number.