21947-20-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21947-20-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,4 and 7 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 21947-20:
(7*2)+(6*1)+(5*9)+(4*4)+(3*7)+(2*2)+(1*0)=106
106 % 10 = 6
So 21947-20-6 is a valid CAS Registry Number.