220135-31-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 220135-31-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,1,3 and 5 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 220135-31:
(8*2)+(7*2)+(6*0)+(5*1)+(4*3)+(3*5)+(2*3)+(1*1)=69
69 % 10 = 9
So 220135-31-9 is a valid CAS Registry Number.