838830-20-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 838830-20-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,3,8,8,3 and 0 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 838830-20:
(8*8)+(7*3)+(6*8)+(5*8)+(4*3)+(3*0)+(2*2)+(1*0)=189
189 % 10 = 9
So 838830-20-9 is a valid CAS Registry Number.