256922-90-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 256922-90-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,6,9,2 and 2 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 256922-90:
(8*2)+(7*5)+(6*6)+(5*9)+(4*2)+(3*2)+(2*9)+(1*0)=164
164 % 10 = 4
So 256922-90-4 is a valid CAS Registry Number.