1257421-87-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1257421-87-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,7,4,2 and 1 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1257421-87:
(9*1)+(8*2)+(7*5)+(6*7)+(5*4)+(4*2)+(3*1)+(2*8)+(1*7)=156
156 % 10 = 6
So 1257421-87-6 is a valid CAS Registry Number.