6504-40-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6504-40-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,5,0 and 4 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 6504-40:
(6*6)+(5*5)+(4*0)+(3*4)+(2*4)+(1*0)=81
81 % 10 = 1
So 6504-40-1 is a valid CAS Registry Number.