20658-09-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20658-09-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,6,5 and 8 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 20658-09:
(7*2)+(6*0)+(5*6)+(4*5)+(3*8)+(2*0)+(1*9)=97
97 % 10 = 7
So 20658-09-7 is a valid CAS Registry Number.