439865-81-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 439865-81-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,3,9,8,6 and 5 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 439865-81:
(8*4)+(7*3)+(6*9)+(5*8)+(4*6)+(3*5)+(2*8)+(1*1)=203
203 % 10 = 3
So 439865-81-3 is a valid CAS Registry Number.