256658-19-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 256658-19-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,6,6,5 and 8 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 256658-19:
(8*2)+(7*5)+(6*6)+(5*6)+(4*5)+(3*8)+(2*1)+(1*9)=172
172 % 10 = 2
So 256658-19-2 is a valid CAS Registry Number.