21139-44-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21139-44-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,1,3 and 9 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 21139-44:
(7*2)+(6*1)+(5*1)+(4*3)+(3*9)+(2*4)+(1*4)=76
76 % 10 = 6
So 21139-44-6 is a valid CAS Registry Number.