171621-47-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 171621-47-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,1,6,2 and 1 respectively; the second part has 2 digits, 4 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 171621-47:
(8*1)+(7*7)+(6*1)+(5*6)+(4*2)+(3*1)+(2*4)+(1*7)=119
119 % 10 = 9
So 171621-47-9 is a valid CAS Registry Number.