66819-72-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 66819-72-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,8,1 and 9 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 66819-72:
(7*6)+(6*6)+(5*8)+(4*1)+(3*9)+(2*7)+(1*2)=165
165 % 10 = 5
So 66819-72-5 is a valid CAS Registry Number.