205178-77-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 205178-77-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,5,1,7 and 8 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 205178-77:
(8*2)+(7*0)+(6*5)+(5*1)+(4*7)+(3*8)+(2*7)+(1*7)=124
124 % 10 = 4
So 205178-77-4 is a valid CAS Registry Number.