Picramic acid

2 -amino-4 ,6-dinitrophenol

Red crystals

Fixed

1.75 g · cm -3

168 ° C.

4.6

• 0.65 g · l-1 in water (25 ° C)
• Soluble in benzene, glacial acetic acid, ethanol and aniline

Template: Infobox chemical / molecular formula search available

The picramic acid (2- amino-4 ,6-dinitrophenol ) is an explosive organic nitro phenol which is derived by the picric acid.

Representation and extraction

The compound can be obtained by partial reduction of picric acid with sodium hydrosulfide, ammonium sulfide or copper and hydrazine.

Properties

Picramic is a crystalline solid. The compound is explosive in the dry state by shock, friction, heat and other sources of ignition in handling and falls under the Explosives Act. The explosion more violent under release of large amounts of gas. A desensitization is possible with 20% water.

Use

After diazotization may be obtained from the compound of the initiating explosive diazodinitrophenol. The compound is used as starting material for azo dyes, as an indicator and as oxidative hair dye.