31520-41-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 31520-41-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,5,2 and 0 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 31520-41:
(7*3)+(6*1)+(5*5)+(4*2)+(3*0)+(2*4)+(1*1)=69
69 % 10 = 9
So 31520-41-9 is a valid CAS Registry Number.