19797-90-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 19797-90-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,7,9 and 7 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 19797-90:
(7*1)+(6*9)+(5*7)+(4*9)+(3*7)+(2*9)+(1*0)=171
171 % 10 = 1
So 19797-90-1 is a valid CAS Registry Number.