21123-47-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21123-47-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,1,2 and 3 respectively; the second part has 2 digits, 4 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 21123-47:
(7*2)+(6*1)+(5*1)+(4*2)+(3*3)+(2*4)+(1*7)=57
57 % 10 = 7
So 21123-47-7 is a valid CAS Registry Number.