66783-99-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 66783-99-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,7,8 and 3 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 66783-99:
(7*6)+(6*6)+(5*7)+(4*8)+(3*3)+(2*9)+(1*9)=181
181 % 10 = 1
So 66783-99-1 is a valid CAS Registry Number.