6541-98-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6541-98-6 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, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 6541-98:
(6*6)+(5*5)+(4*4)+(3*1)+(2*9)+(1*8)=106
106 % 10 = 6
So 6541-98-6 is a valid CAS Registry Number.