78515-20-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 78515-20-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,8,5,1 and 5 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 78515-20:
(7*7)+(6*8)+(5*5)+(4*1)+(3*5)+(2*2)+(1*0)=145
145 % 10 = 5
So 78515-20-5 is a valid CAS Registry Number.