19569-21-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 19569-21-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,5,6 and 9 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 19569-21:
(7*1)+(6*9)+(5*5)+(4*6)+(3*9)+(2*2)+(1*1)=142
142 % 10 = 2
So 19569-21-2 is a valid CAS Registry Number.