103905-77-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 103905-77-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,3,9,0 and 5 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 103905-77:
(8*1)+(7*0)+(6*3)+(5*9)+(4*0)+(3*5)+(2*7)+(1*7)=107
107 % 10 = 7
So 103905-77-7 is a valid CAS Registry Number.