7571-87-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7571-87-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,5,7 and 1 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 7571-87:
(6*7)+(5*5)+(4*7)+(3*1)+(2*8)+(1*7)=121
121 % 10 = 1
So 7571-87-1 is a valid CAS Registry Number.