1257661-28-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1257661-28-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,7,6,6 and 1 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1257661-28:
(9*1)+(8*2)+(7*5)+(6*7)+(5*6)+(4*6)+(3*1)+(2*2)+(1*8)=171
171 % 10 = 1
So 1257661-28-1 is a valid CAS Registry Number.