20438-17-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20438-17-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,4,3 and 8 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 20438-17:
(7*2)+(6*0)+(5*4)+(4*3)+(3*8)+(2*1)+(1*7)=79
79 % 10 = 9
So 20438-17-9 is a valid CAS Registry Number.
InChI:InChI=1/C6H5N3/c1-5-2-8-4-9-6(5)3-7-1/h1-4,7H