Pronunciation: [pˈɪkɹɪk ˈasɪd] (IPA) 
Picric acid is a yellow, explosive organic compound used in the manufacture of dyes and explosives. Its unique spelling can be explained through IPA phonetic transcription as [ˈpɪkrɪk ˈæsɪd]. The first sound [ˈpɪkrɪk] is a combination of the "p" as in "pat," the "ɪ" as in "sit," and the "kr" sound, which is a blend of "k" and "r." The final sound [ˈæsɪd] is pronounced as the "a" in "cat" and the "s" and "d" sounds in "sad."
Picric acid is a yellow crystalline substance with the chemical formula C6H3N3O7. It is a powerful explosive and a toxic substance. The term "picric" is derived from the Greek word "pikros," which means bitter. This is because picric acid has a characteristic bitter taste.
In terms of physical properties, picric acid is a solid compound that is insoluble in water but soluble in various organic solvents. It has a high melting point and decomposes at high temperatures. Picric acid is primarily used as an explosive in the form of picrate salts due to its highly explosive nature. It was widely used in military applications, especially during World War I and World War II.
From a chemical perspective, picric acid belongs to the class of organic compounds known as trinitrophenols. It consists of a phenol ring with three nitro (NO2) groups attached to it. These nitro groups confer high instability and explosive properties to the compound.
Picric acid is highly toxic and can cause severe burns, especially when it comes into contact with the skin. Inhalation or ingestion of picric acid can also be harmful and may lead to symptoms such as dizziness, nausea, vomiting, and liver damage. Safety precautions, including wearing protective clothing and handling the compound in well-ventilated areas, are essential when dealing with picric acid.
Trinitrophenol, carbazotic acid, C6H2(NO2)3OH, formed commercially by dropping phenol into fuming nitric acid; it occurs in the form of yellow crystals, of bitter taste, slightly soluble in water; it is sometimes used as an application in burns, eczema, erysipelas, and pruritus.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
The word "picric" is derived from the Greek word "pikros", meaning "bitter". It refers to the intensely bitter taste of picric acid.
