6541-62-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6541-62-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,5,4 and 1 respectively; the second part has 2 digits, 6 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 6541-62:
(6*6)+(5*5)+(4*4)+(3*1)+(2*6)+(1*2)=94
94 % 10 = 4
So 6541-62-4 is a valid CAS Registry Number.