21934-53-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21934-53-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,3 and 4 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 21934-53:
(7*2)+(6*1)+(5*9)+(4*3)+(3*4)+(2*5)+(1*3)=102
102 % 10 = 2
So 21934-53-2 is a valid CAS Registry Number.