6581-58-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6581-58-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,5,8 and 1 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 6581-58:
(6*6)+(5*5)+(4*8)+(3*1)+(2*5)+(1*8)=114
114 % 10 = 4
So 6581-58-4 is a valid CAS Registry Number.