19771-66-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 19771-66-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,7,7 and 1 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 19771-66:
(7*1)+(6*9)+(5*7)+(4*7)+(3*1)+(2*6)+(1*6)=145
145 % 10 = 5
So 19771-66-5 is a valid CAS Registry Number.