21308-09-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21308-09-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,3,0 and 8 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 21308-09:
(7*2)+(6*1)+(5*3)+(4*0)+(3*8)+(2*0)+(1*9)=68
68 % 10 = 8
So 21308-09-8 is a valid CAS Registry Number.