PARA NITRO PHENOL

Para Nitro Phenol also called 4-Nitrophenol (also called p-nitrophenol or 4-hydroxynitrobenzene).

PHARMA :

4-Nitrophenol is used to manufacture drugs (as an intermediate in the synthesis of paracetamol, 4-nitrophenol is reduced to 4-aminophenol, then acetylated with acetic anhydride).

AGROCHEMICALS :

Most (87%) of the PNP produced is used in the manufacture of ethyl and methyl parathions, but the compound has itself been used as a fungicide. However, derivatives of 4-nitrophenol have been reportedly used as leather fungicides.

It is also a common metabolite from a variety of compounds and a biomarker of organophosphate (OP) in secticide exposure.

PH INDICATOR :

PNP is used as the precursor for preparation of pH indicators (colorless at 5 and yellow at 7).

Solution of 4-nitrophenol alone appears colorless or pale yellow, whereas its phenolic salts tend to develop a bright yellow color. This color-changing property makes this compound useful as a pH indicator.

 

Structural Formula :

Para Nitro Phenol

 

Molecular Formula : C6H5NO3

Molecular Weight : 139.11 g/mol.

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