123840-16-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 123840-16-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,3,8,4 and 0 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 123840-16:
(8*1)+(7*2)+(6*3)+(5*8)+(4*4)+(3*0)+(2*1)+(1*6)=104
104 % 10 = 4
So 123840-16-4 is a valid CAS Registry Number.