2664-56-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2664-56-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,6,6 and 4 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 2664-56:
(6*2)+(5*6)+(4*6)+(3*4)+(2*5)+(1*6)=94
94 % 10 = 4
So 2664-56-4 is a valid CAS Registry Number.