78668-57-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 78668-57-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,8,6,6 and 8 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 78668-57:
(7*7)+(6*8)+(5*6)+(4*6)+(3*8)+(2*5)+(1*7)=192
192 % 10 = 2
So 78668-57-2 is a valid CAS Registry Number.