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When heating 2,3,4-pentanetrione with oxygen, the oxidation products are diacetyl, acetic acid, water and carbon dioxide. [9] Alkalis convert it into acetic acid and formaldehyde. [8] 2,3,4-Pentanetrione does a condensation reaction with o-phenylenediamine to yield methyl-quinoxaline-2-methylketone, a heterocyclic dicycle. In this the carbon ...
2,4-Dinitrophenylhydrazine (2,4-DNPH or DNPH) is the organic compound C 6 H 3 (NO 2) 2 NHNH 2. DNPH is a red to orange solid. It is a substituted hydrazine. The solid is relatively sensitive to shock and friction. For this reason DNPH is usually handled as a wet powder. DNPH is a precursor to the drug Sivifene.
o-Nitrophenol (2-nitrophenol; OH and NO 2 groups are neighboring, a yellow solid. m-Nitrophenol (3-nitrophenol, CAS number: 554-84-7), a yellow solid (m.p. 97 °C) and precursor to the drug mesalazine (5-aminosalicylic acid). It can be prepared by nitration of aniline followed by replacement of the amino group via its diazonium derivative. [2]
A solution of 4-nitrophenol appears colorless below pH 5.4 and yellow above pH 7.5. [3] This color-changing property makes this compound useful as a pH indicator. The yellow color of the 4-nitrophenolate form (or 4-nitrophenoxide) is due to a maximum of absorbance at 405 nm (ε = 18.3 to 18.4 mM −1 cm −1 in strong alkali). [4]
INT (iodonitrotetrazolium or 2-(4-iodophenyl)-3-(4-nitrophenyl)-5-phenyl-2H-tetrazolium) is a commonly used tetrazolium salt (usually prepared with chloride ions), similar to tetrazolium chloride that on reduction produces a red formazan dye that can be used for quantitative redox assays. It is also toxic to prokaryotes.
[4] Spy dust was detected in the Soviet Union in 1970s in tiny quantities. In 1984, KGB officer Sergei Votontsov (Code name GT/COWL) provided a sample of the substance. [4] Soviet defector Vitaly Yurchenko confirmed the chemical. [4] [6] In the summer of 1985 the powder began to appear in Moscow in much larger quantities.
The publication was established in 1972 under the name Commodities. [4] The name was changed to Futures in September 1983 and Modern Trader in 2015. [3] The magazine is a standard source in futures and option trading, and its SourceBook site is a standard reference to US brokerage and related services. [5]
Bis(2,4-dinitrophenyl) oxalate (DNPO) is a source of 1,2-dioxetanedione, a chemical used in glow sticks. [1] Other chemicals related to DNPO used in glow sticks include bis(2,4,6-trichlorophenyl)oxalate (TCPO) and bis(2,4,5-trichlorophenyl-6-carbopentoxyphenyl)oxalate (CPPO).