817209-09-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 817209-09-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,1,7,2,0 and 9 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 817209-09:
(8*8)+(7*1)+(6*7)+(5*2)+(4*0)+(3*9)+(2*0)+(1*9)=159
159 % 10 = 9
So 817209-09-9 is a valid CAS Registry Number.