77321-52-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 77321-52-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,3,2 and 1 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 77321-52:
(7*7)+(6*7)+(5*3)+(4*2)+(3*1)+(2*5)+(1*2)=129
129 % 10 = 9
So 77321-52-9 is a valid CAS Registry Number.