635684-80-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 635684-80-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,5,6,8 and 4 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 635684-80:
(8*6)+(7*3)+(6*5)+(5*6)+(4*8)+(3*4)+(2*8)+(1*0)=189
189 % 10 = 9
So 635684-80-9 is a valid CAS Registry Number.