1758-21-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1758-21-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,7,5 and 8 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1758-21:
(6*1)+(5*7)+(4*5)+(3*8)+(2*2)+(1*1)=90
90 % 10 = 0
So 1758-21-0 is a valid CAS Registry Number.