83904-40-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 83904-40-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,3,9,0 and 4 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 83904-40:
(7*8)+(6*3)+(5*9)+(4*0)+(3*4)+(2*4)+(1*0)=139
139 % 10 = 9
So 83904-40-9 is a valid CAS Registry Number.