178743-91-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 178743-91-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,8,7,4 and 3 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 178743-91:
(8*1)+(7*7)+(6*8)+(5*7)+(4*4)+(3*3)+(2*9)+(1*1)=184
184 % 10 = 4
So 178743-91-4 is a valid CAS Registry Number.