21402-59-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21402-59-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,4,0 and 2 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 21402-59:
(7*2)+(6*1)+(5*4)+(4*0)+(3*2)+(2*5)+(1*9)=65
65 % 10 = 5
So 21402-59-5 is a valid CAS Registry Number.