1190305-25-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1190305-25-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,9,0,3,0 and 5 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1190305-25:
(9*1)+(8*1)+(7*9)+(6*0)+(5*3)+(4*0)+(3*5)+(2*2)+(1*5)=119
119 % 10 = 9
So 1190305-25-9 is a valid CAS Registry Number.
1190305-25-9Relevant articles and documents
Unexpected cyclization route for o-ethynylbenzoic acids hydrazides in the presence of base
Vasilevsky,Mikhailovskaya
, p. 55 - 58 (2009)
The reaction of o-ethynylbenzoic acids hydrazides with base has been studied. In the presence of a strong donor substituent (1,5-dimethylpyrazol-4- yl) it has been found that an unusual cyclization route occurs to give the corresponding benzopyridazinone
