439943-18-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 439943-18-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,3,9,9,4 and 3 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 439943-18:
(8*4)+(7*3)+(6*9)+(5*9)+(4*4)+(3*3)+(2*1)+(1*8)=187
187 % 10 = 7
So 439943-18-7 is a valid CAS Registry Number.