197715-99-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 197715-99-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,7,7,1 and 5 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 197715-99:
(8*1)+(7*9)+(6*7)+(5*7)+(4*1)+(3*5)+(2*9)+(1*9)=194
194 % 10 = 4
So 197715-99-4 is a valid CAS Registry Number.