39900-20-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 39900-20-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,9,9,0 and 0 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 39900-20:
(7*3)+(6*9)+(5*9)+(4*0)+(3*0)+(2*2)+(1*0)=124
124 % 10 = 4
So 39900-20-4 is a valid CAS Registry Number.