1658-00-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1658-00-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,6,5 and 8 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1658-00:
(6*1)+(5*6)+(4*5)+(3*8)+(2*0)+(1*0)=80
80 % 10 = 0
So 1658-00-0 is a valid CAS Registry Number.