6520-86-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6520-86-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,5,2 and 0 respectively; the second part has 2 digits, 8 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 6520-86:
(6*6)+(5*5)+(4*2)+(3*0)+(2*8)+(1*6)=91
91 % 10 = 1
So 6520-86-1 is a valid CAS Registry Number.