5540-64-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 5540-64-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,5,4 and 0 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 5540-64:
(6*5)+(5*5)+(4*4)+(3*0)+(2*6)+(1*4)=87
87 % 10 = 7
So 5540-64-7 is a valid CAS Registry Number.