Question

what is the chemical formula of lassaigne's extract?

Answer 1

Answer:

The extract is confirmed to be ferrous sulphate.

Explanation:

The extract is called sodium fusion extract or Lassaigne's extract. When an organic compound is heated strongly with sodium, any halogens, nitrogen, and sulphur will be converted into inorganic sodium salts such as sodium halide (for halides), sodium cyanide (for nitrogen), sodium sulfide (for sulphur), and sodium thiocyanate (for sulphur and nitrogen).The nitrogen is confirmed with ferrous sulphate .

Answer 2

I think.it is Prussian blue.... "#Fe4[Fe.(CN)6]3