1313991-28-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1313991-28-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,1,3,9,9 and 1 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1313991-28:
(9*1)+(8*3)+(7*1)+(6*3)+(5*9)+(4*9)+(3*1)+(2*2)+(1*8)=154
154 % 10 = 4
So 1313991-28-4 is a valid CAS Registry Number.