21101-59-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21101-59-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,1,0 and 1 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 21101-59:
(7*2)+(6*1)+(5*1)+(4*0)+(3*1)+(2*5)+(1*9)=47
47 % 10 = 7
So 21101-59-7 is a valid CAS Registry Number.