21894-20-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21894-20-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,8,9 and 4 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 21894-20:
(7*2)+(6*1)+(5*8)+(4*9)+(3*4)+(2*2)+(1*0)=112
112 % 10 = 2
So 21894-20-2 is a valid CAS Registry Number.