Question

Why is picric acid so dangerous? In what form is it most dangerous? If picric acid is needed, what considerations/precautions need to be taken (purchase, storage, etc.)?

Answer 1

Answer:

It is having the three -NO2 groups, These are the -Mesomeric groups (-ME). Hence it can lose the protan easily as a result of this the strong organic acid.

Dangerous form:

In the dry form it is dangerous and explosive. Generally it is stored in wet form. In the laboratories it is stored in the bottles under a layer of water.

Precautions:

Do not allow this material to dry out. Do not let dry picric acid (crystals) form in container or on the cap threads of container. strong incandescent light. Ground all equipment containing material. Empty containers may contain hazardous residue and pose a fire risk. Do not ingest. Do not breathe dust. Take precautionary measures against electrostatic discharges. Avoid shock and friction. In case of insufficient ventilation, wear suitable respiratory equipment. If ingested, seek medical advice immediately and show the container or the label. Avoid contact with skin and eyes. Keep away from incompatibles such as oxidizing agents, reducing agents, metals, alkalis. Keep away from heat. Keep away from sources of ignition. Keep away from direct sunlight.

Storage:

Store in a segregated, approved and labeled area away from acute fire hazards and powerful oxidizing materials. Isolate from Organic materials. Do not store in metal containers. Keep container in a cool, well-ventilated area. Do not allow this material to dry out. Keep Picric acid wetted with a minimum of 30% water. Keep container tightly closed and sealed until ready for use. Avoid all possible sources of ignition (spark or flame).