1616971-45-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1616971-45-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,1,6,9,7 and 1 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1616971-45:
(9*1)+(8*6)+(7*1)+(6*6)+(5*9)+(4*7)+(3*1)+(2*4)+(1*5)=189
189 % 10 = 9
So 1616971-45-9 is a valid CAS Registry Number.