256521-48-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 256521-48-9 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, 4 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 256521-48:
(8*2)+(7*5)+(6*6)+(5*5)+(4*2)+(3*1)+(2*4)+(1*8)=139
139 % 10 = 9
So 256521-48-9 is a valid CAS Registry Number.