31261-42-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 31261-42-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,2,6 and 1 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 31261-42:
(7*3)+(6*1)+(5*2)+(4*6)+(3*1)+(2*4)+(1*2)=74
74 % 10 = 4
So 31261-42-4 is a valid CAS Registry Number.