2,4-dinitrophenylhydrazine

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2,4-dinitrophenylhydrazine

[¦tü ¦fȯr dī¦nī·trō‚fen·əl′hī·drə‚zēn]
(organic chemistry)
(NO2)2C6H3-NHNH2 A red, crystalline powder with a melting point of approximately 200°C; soluble in dilute inorganic acids; used as a reagent for determination of ketones and aldehydes.
References in periodicals archive ?
Guidance was issued to schools and referred to the safe storage of chemical 2,4-DNP (2,4-dinitrophenylhydrazine).
A bomb squad was also called to Ponteland Community High School on Monday after the same chemical - 2,4-DNP - was found in a potentially dangerous state at the site.
The advice reads: "Schools who hold stocks of 2,4-DNP are reminded to check the storage arrangements for this chemical.
Schools and colleges across the UK were told to check their stores after new UK-wide guidance was issued on the storage of a chemical called 2,4-DNP.
A Cardiff council spokesman said: "The local authority has issued guidance to all secondary schools on what steps to take if they hold stocks of 2,4-DNP.
CLEAPSS, that provides support to the vast majority of schools and colleges, has recently received a number of calls regarding a particular chemical - 2,4-DNP (2,4-dinitrophenylhydrazine).
This modification is associated with the chemistry surface since phosphoric acid can interact with oxygen groups present on it and remain there to facilitate retention of the 2,4-DNP or also it carries out polymerization of phosphoric acid whose species is deposited on the surface and promote the adsorption of the adsorbate, Nahil&Williams (2012), Yavuz, (2010).
Regarding the impregnation hydroxide (Figure 3), it can be observed a slight decrease in the adsorption of 2,4-DNP reference to the non-impregnated activated carbon, indicating that under the conditions of this study the impregnation of activated carbons with KOH has not effect on 2,4 DNP adsorption.
However, a deep yellow spot was observed with 2,4-DNP spray reagent, indicating the presence of a carbonyl group.
2,4-DNP is also used as an intermediate to make dyes, photochemicals, and explosives and as an indicator for the detection of potassium and ammonium ions [2].
The alarm was raised at Ponteland Community High School in Northumberland after chemical 2,4-DNP was found in a potentially dangerous state at the site.
The alarm was raised at Ponteland Community High School after chemical 2,4-DNP was found in a potentially dangerous state.

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