905809-34-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 905809-34-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,0,5,8,0 and 9 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 905809-34:
(8*9)+(7*0)+(6*5)+(5*8)+(4*0)+(3*9)+(2*3)+(1*4)=179
179 % 10 = 9
So 905809-34-9 is a valid CAS Registry Number.