21243-02-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21243-02-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,2,4 and 3 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 21243-02:
(7*2)+(6*1)+(5*2)+(4*4)+(3*3)+(2*0)+(1*2)=57
57 % 10 = 7
So 21243-02-7 is a valid CAS Registry Number.