256521-58-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 256521-58-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,6,5,2 and 1 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 256521-58:
(8*2)+(7*5)+(6*6)+(5*5)+(4*2)+(3*1)+(2*5)+(1*8)=141
141 % 10 = 1
So 256521-58-1 is a valid CAS Registry Number.