25381-21-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 25381-21-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,5,3,8 and 1 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 25381-21:
(7*2)+(6*5)+(5*3)+(4*8)+(3*1)+(2*2)+(1*1)=99
99 % 10 = 9
So 25381-21-9 is a valid CAS Registry Number.
InChI:InChI=1/C12H11ClN2OS/c1-2-17-10-8-14-15(12(16)11(10)13)9-6-4-3-5-7-9/h3-8H,2H2,1H3
25381-21-9Relevant articles and documents
The Reaction of 2-Substituted-4,5-dichloro-3(2H)-pyridazinones with Alkoxides and Alkylthiolates
Lyga, John W.
, p. 1757 - 1760 (2007/10/02)
The reaction of 2-substituted-4,5-dichloro-3(2H)-pyridazinones 1a-b with alkoxides and alkylthiolates was investigated.Regiospecific displacement of either the 4 or 5 chlorine atom could be achieved in most cases by appropriate selection of the reaction solvent.
