21509-30-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21509-30-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,5,0 and 9 respectively; the second part has 2 digits, 3 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 21509-30:
(7*2)+(6*1)+(5*5)+(4*0)+(3*9)+(2*3)+(1*0)=78
78 % 10 = 8
So 21509-30-8 is a valid CAS Registry Number.