197709-28-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 197709-28-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,7,7,0 and 9 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 197709-28:
(8*1)+(7*9)+(6*7)+(5*7)+(4*0)+(3*9)+(2*2)+(1*8)=187
187 % 10 = 7
So 197709-28-7 is a valid CAS Registry Number.