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.
The chemical, 2,4-dinitrophenylhydrazine, (2,4-DNP), was destroyed by army teams.
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.
"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)."
To compare the isotherms, it shows that the impregnation of granular carbon with phosphoric acid generates an increased adsorption of 2,4-DNP, indicating that the post activation impregnation without temperature increase, generates a change occurs in the solid which favors the adsorption of the phenolic compound.
And the photocatalytic activity of the [Y.sub.2][O.sub.3]-ZnO complex oxides was studied using 2,4-dinitrophenol (2,4-DNP) as simulate phenolic wastewater.
However, a deep yellow spot was observed with 2,4-DNP spray reagent, indicating the presence of a carbonyl group.
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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