What is the use of picric acid?
Uses. Picric acid is used in the production of explosives, matches, and electric batteries. It is also used in etching copper and manufacturing colored glass, in the leather industry, and in the synthesis of dyes. Picric acid is very unstable and is a flammmable/combustible material.
Is picric acid an explosive?
Potential Explosion Hazards When hydrated, picric acid is a typically safe to handle, but it becomes a powerful explosive when dry (less than 10% water). Dry picric acid is highly sensitive to heat, shock, and friction. The moistened solid is classified as a flammable solid.
What is the CAS for picric acid?
88-89-1
88-89-1 CAS | PICRIC ACID | Acids-Organic | Article No. 05280.
Why is picric acid used in Burns?
The astringent actzon of picric acid on the dilated blood- vessels of the surrounding hypercemic areas, is of value in controlling inflammation and preventing that spread which is popularly believed to go on for eight days after a burn.
Why picric acid is stored under water?
friction or heat sensitive and create a powerful explosion. Dry picric acid can also form even more unstable salts explosive picrate salts when in contact with concrete, amines, bases, and certain metals. Picric acid should always be kept wet with at least 10% or more water.
Why do your fingers become yellow with picric acid?
Picric acid does not sensitize directly, but only after conversion to a more reactive compound. With direct contact, picric acid causes a yellowish staining of the hair and skin (pseudo-jaundice) which was common in workers when picric acid was used as an explosive in munitions production.
What is the Ka of C6H3N3O7?
5. September 02, 2014. 3) Formic acid, HCO2H, has a pKa = 3.75, and picric acid, C6H3N3O7, has a pKa = 0.38.
What is derivative of picric acid?
Picric acid is a derivative of benzene. When Phenol reacts with Concentrated HN0₃, it forms 2,4,6-Trinitrophenol which is also known as Picric acid.
How do you store picric acid solution?
Picric acid should be stored in a dry, dark environment away from potential sources of ignition, the concentration and solvent in which solutions are prepared should be clearly visible on the outside of the container.
How do you remove picric acid from your hands?
Skin Exposure (spill on hands): Wash hands thoroughly with soap and copious amounts of water. Notify supervisor immediately. Skin Exposure (spill on body or clothes): Remove affected clothing and rinse body thoroughly in emergency shower for at least 15 minutes.
What is the pKa value?
The pKa value is the negative base -10 logarithm of the acid dissociation constant (Ka) of a solution. The quantitative behavior of acids and bases in solution can be understood only if their pKa values are known.
How picric acid is formed?
Picric acid is basically prepared from phenol by reacting phenol with concentrated sulphuric acid and concentrated nitric acid. The nitro groups from nitric acid attacks on ortho and para positions which is the best suitable and stable position for the newly formed compound which is picric acid.
How is picrate formed?
Picrate salts are formed by the reaction of picric acid with any of the following: metals, metal salts, bases, ammonia and concrete. Particular attention must be paid in order to prevent the formation of picrate salts during normal use of picric acid.