Smoke from analginum and hydroperit mixture

A smoke bomb with a nasty smell is made from two solids.

Scientific name: Analgin and urea peroxide react producing a large number of different products.


Дымовуха из гидроперита и анальгина- химические опыты


Формула реакции анальгина и гидроперита !

by Наука и Изобретения


Wear eye protection goggles and gloves. Perform this experiment outdoors or in a fume hood. Avoid inhaling fumes.

Always follow general safety recommendations. Please note that conducting chemistry experiments you must comply with the relevant legal procedures in your country.

Reaction formula

-SO3 + 2H2O2 → H2S + H2O + 3O2

2-NCH3 + 2H2O → 2H2NCH3 + O2

H2NCH3 + H2S → [H3NCH3]HS

Step-by-step instruction

  1. The products of the chemical reaction under study have a very specific smell. Perform this experiment in a fume hood or outdoors.
  2. Pestle to powder 1 tablet of urea peroxide (hydroperit) in a porcelain dish.
  3. Add 2 tablets of analgin and repeat the procedure.
  4. Wait for a few minutes. The Reaction proceeds with evolution of a large amount of white acrid smoke.

Scientific background

The reaction between analginum (methamizole) and urea peroxide is complicated and is not fully understood. A very complex mixture of chemical reaction products is produced. One of the proposed explanations sounds as follows:

Both sulfo and methylamine groups of methamizole are involved in the reaction. The first step is the reaction of sulfo group with hydrogen peroxide:

-SO3 + 2H2O2 → H2S + H2O + 3O2

At the second step the water formed in first reaction leads to partial hydrolysis of C-N bond. Methylamine is cleaved.

2-NCH3 + 2H2O → 2H2NCH3 + O2

Hydrogen sulfide reacts with methylamine giving methyl ammonium hydrosulfide:

H2NCH3 + H2S → [H3NCH3]HS

The suspension of methyl ammonium hydrosulfide crystals in air creates a visual effect of “smoke”. The specific nasty smell is caused by the presence of methylamine and hydrogen sulfide.


Published on 05 August 2015

  • Fire
  • Heating with fire
  • Explosion
  • Poisoned gas
  • Organic
  • Electricity
  • Solution
  • Oxidation reduction
  • Color change
  • Precipitate
  • Gassing
  • Catalyst