103391-21-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 103391-21-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,3,3,9 and 1 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 103391-21:
(8*1)+(7*0)+(6*3)+(5*3)+(4*9)+(3*1)+(2*2)+(1*1)=85
85 % 10 = 5
So 103391-21-5 is a valid CAS Registry Number.