1781445-80-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1781445-80-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,7,8,1,4,4 and 5 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1781445-80:
(9*1)+(8*7)+(7*8)+(6*1)+(5*4)+(4*4)+(3*5)+(2*8)+(1*0)=194
194 % 10 = 4
So 1781445-80-4 is a valid CAS Registry Number.