7718-52-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7718-52-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,7,1 and 8 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 7718-52:
(6*7)+(5*7)+(4*1)+(3*8)+(2*5)+(1*2)=117
117 % 10 = 7
So 7718-52-7 is a valid CAS Registry Number.