421571-75-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 421571-75-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,2,1,5,7 and 1 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 421571-75:
(8*4)+(7*2)+(6*1)+(5*5)+(4*7)+(3*1)+(2*7)+(1*5)=127
127 % 10 = 7
So 421571-75-7 is a valid CAS Registry Number.