16611-57-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 16611-57-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,6,1 and 1 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 16611-57:
(7*1)+(6*6)+(5*6)+(4*1)+(3*1)+(2*5)+(1*7)=97
97 % 10 = 7
So 16611-57-7 is a valid CAS Registry Number.