21407-82-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21407-82-9 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 7 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 21407-82:
(7*2)+(6*1)+(5*4)+(4*0)+(3*7)+(2*8)+(1*2)=79
79 % 10 = 9
So 21407-82-9 is a valid CAS Registry Number.