Barium nitrate

Barytsalpeter

• BaN2O6
• Ba (NO3) 2

White solid

Fixed

3.2 g · cm -3

> 550 ° C ( decomposition)

Moderately in water ( 90 g · l-1 at 20 ° C)

Risk

0.5 mg · m-3

355 mg · kg -1 ( LD50, rat, oral)

-988.0 KJ / mol

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Barium nitrate is a nitrate salt of the alkaline earth metal barium. It has the formula Ba ( NO3 ) 2 and belongs to the group of nitrates.

Production and representation

Barium can be represented by the following chemical reactions:

Properties

Barium nitrate occurs as a colorless crystalline solid. It is a health hazard and a slightly water polluting substance. It causes in the burner flame typical of barium green flame color and can be used as the oxidant.

Barium nitrate decomposes at temperatures greater than 550 ° C to barium oxide, nitrogen, oxygen and nitric oxide. Due to the oxygen liberated and above all of the released nitric oxide barium nitrate is a good oxidizing agent.

Anhydrous barium nitrate crystallizes in the cubic crystal system in space group Pa3 with the lattice parameters a = 811.84 pm. In the unit cell contains four formula units. The crystals are isotypic with strontium nitrate.

Use

Barium nitrate is used in pyrotechnics for the production of fireworks and colored sparklers, because it turns green flames and at the same time is an oxidizing agent. It is also used as the oxidizer in the primer of the cartridge and cartridge. A highly explosive mixture of TNT and barium nitrate is called Baratol.

It is also used in luminescent screens for television receiver.

Analysis

The first evidence for the identification of barium in barium nitrate is obtained by the green flame test. The anion can be detected by ring sample or reagent Lunges (see also evidence for anions).