High Quality Cupferron CAS 135-20-6

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Cupferron
135-20-6

Name: Cupferron

Cas: 135-20-6

Purity: 99%min

MOQ: 1KG

Basic Info:

CAS No:135-20-6
Formula:C6H9N3O2
EINECS:205-183-2
Stock AvailabilityIn stock
Brand NameLook chemical
OriginChina

Product Introduction:

Cupferron is the ammonium salt of N-nitrosophenylhydrazine and is a general reagent for metal ion complexes. Its molecular formula is C6H9N3O2. Its anion is coordinated with two oxygen atoms and metal ions to form a five-dentate chelate.

Alias: N-Nitroso-N-phenyl-hydroxylamin, Ammonium-Salz, Kupferon, etc., usually white or light yellow bright scaly crystals, sweet taste, and the color will become darker after long time.

Cupferron is soluble in water and ethanol, and can form a water-insoluble complex with copper, iron, aluminum, titanium, etc., and can be extracted by organic solvents such as chloroform and ethyl acetate.

The Cupferron reagent is decomposed by heat to generate nitrobenzene, which is unstable in light and air. It needs to be stored in a brown ground-top reagent bottle. Usually a small amount of ammonium carbonate wrapped in paper or cloth is placed in the bottle as a preservative, and it is sealed and protected from light. In the shade.

Cupferron powder can be used as a precipitation agent and solvent extraction agent for copper, iron, tin, titanium, vanadium, chromium and other elements, and as a masking agent for the determination of rare earths.

Nature and Specifications:

Product Packaging

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Product Usage:

  • Cupferron Powder is generally used as a chemical analysis reagent to determine aluminum, copper, iron, titanium, zirconium and other metals.
  • Cupferron is used to separate copper and iron from other metal ions. It can also quantitatively determine iron from strong acid solutions and quantitatively analyze vanadates.
  • Separate copper and iron when together with other metals, and act as a masking agent when measuring rare earths.
  • Polymerization inhibitor, due to Cupferron’s unique polymerization inhibitory properties and small dosage, it can be used as a substitute product for phenol polymerization inhibitor BHT, which is currently widely used.
  • Used as a precipitant, it can precipitate Al3+, Cu2+ Fe3+, Hg2+, Sn2+, Ti4+ plasma.
  • Cupferron reagent can also be used for precipitation separation or weighing analysis.
  • The precipitate is soluble in organic solvents, so it can be used as an extractant for extraction separation or photometric analysis.

Production and Purification Methods:

Three Methods of Making Cupferron

Way one:

  • The phenylhydroxyl ether solution was cooled in ice solution, and ammonia was introduced to excess. While stirring and the ammonia was continued, n-butyl nitrite was added dropwise, and the addition was completed in about 1 hour, and then stirred for 15 minutes.
  • The cupferron precipitate is filtered out, washed with ether, and dried to obtain Cupferron finished product.
  • Because of its special properties, its products should be stored in brown glass bottles, and a small amount of ammonium carbonate wrapped in paper (or cloth) should be placed in the bottle as a stabilizer.

Way two:

  • Cool the phenylhydrazine ether solution, pass in excess ammonia, add n-butyl nitrite dropwise, filter out the precipitate of copper-iron reagent, wash with ether, and dry.

Way Three:

  • Mix nitrobenzene, ammonium chloride and water, heat to 40°C, add zinc powder with a content of more than 85% according to the theoretical amount, control the temperature to 60-65°C, react for half an hour after the addition, and let it stand.
  • Separate the supernatant and add it to the ice-salt mixture, cool to crystallize, dissolve the filtered crystalline β-phenylhydroxylamine with ether, filter out the insolubles, cool to 0°C, and quickly pass in excess ammonia gas.
  • Then, while continuing to ventilate ammonia, add freshly distilled n-butyl nitrite (95g per 100g of phenylhydrazine ester), and control the esterification rate so that the reaction temperature does not exceed 10°C. After the reaction is over, continue to stir for more than 10 minutes, stand still, filter, wash the crystals with ether for several times, and lay down and dry naturally to obtain the finished Cupferron.

Purification Method

  • Cupferron is the ammonium salt of N-nitrosophenylhydrazine and is a general reagent for metal ion complexes. Its molecular formula is C6H9N3O2. Its anion is coordinated with two oxygen atoms and metal ions to form a five-dentate chelate.
  • Alias: N-Nitroso-N-phenyl-hydroxylamin, Ammonium-Salz, Kupferon, etc., usually white or light yellow bright scaly crystals, sweet taste, and the color will become darker after long time.
  • Cupferron is soluble in water and ethanol, and can form a water-insoluble complex with copper, iron, aluminum, titanium, etc., and can be extracted by organic solvents such as chloroform and ethyl acetate.
  • Usually a small amount of ammonium carbonate wrapped in paper or cloth is placed in the bottle as a preservative, and it is sealed and protected from light. In the shade.
  • Cupferron reagent can be used as a precipitation agent and solvent extraction agent for copper, iron, tin, titanium, vanadium, chromium and other elements, and as a masking agent for the determination of rare earths.

Note: Due to reasons such as product and time, the above related methods are for reference only, and the actual operation should be carried out according to actual needs.

Related References:

  1. An overview of the crystal structure of Zirconia Cupferrate. – Acta Chemica Scandinavica.
  2. Wikipedia

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