Overview
2,4,6-Trinitrophenol, also known as picric acid, is a well-known chemical compound with significant industrial and laboratory applications. It was first synthesized in the late 19th century and has since been used primarily in explosives and dyes. Its bright yellow color and explosive properties make it a compound of interest in various fields, including military and chemical research. The compound is highly sensitive to shock and friction when dry, necessitating careful handling and storage. Despite its hazardous nature, picric acid remains valuable in specific industrial processes and laboratory settings due to its unique chemical properties.
Physical and Chemical Properties
Picric acid is a yellow crystalline solid with a density of 1.763 g/cm³. It melts at 122.5 °C and decomposes at temperatures above 300 °C. The compound is soluble in water, alcohol, benzene, and acetone, making it versatile for various chemical applications. One of its key properties is its strong acidic nature, which allows it to form salts known as picrates. These picrates are often more sensitive to shock and friction than picric acid itself, adding to the compound's hazardous profile. The explosive power of picric acid is comparable to TNT, making it a potent material in explosive formulations.
Main Applications
Picric acid is primarily used in the production of explosives, where its high energy content and stability in moist conditions are advantageous. It has been historically used in munitions and artillery shells, though its use has declined in favor of safer alternatives. In addition to explosives, picric acid serves as a dye for textiles and biological staining. Its yellow color is effective in staining wool and silk. The compound is also used in chemical synthesis, particularly in the preparation of other nitro compounds and as a reagent in laboratories for identifying proteins and alkaloids.
Safety and Storage
Due to its explosive nature, picric acid must be stored under strict conditions. It should be kept moist with at least 10% water content to prevent accidental detonation. Storage areas should be cool, dry, and away from sources of heat or mechanical shock. Handling picric acid requires personal protective equipment (PPE), including gloves, goggles, and lab coats. Spills should be cleaned up immediately with appropriate neutralizing agents. Old or dried-out samples should be treated as hazardous waste and disposed of by professionals to avoid accidental explosions.
B2B Procurement Guide
When procuring picric acid, businesses must prioritize safety and regulatory compliance. Suppliers should be vetted for adherence to safety standards and proper handling procedures. Purchasing in small, moist quantities is recommended to minimize risks during transport and storage. Prices for picric acid vary based on purity and quantity, typically ranging from $50 to $200 per kg. Buyers should also consider the logistics of storage and handling when planning procurement. It is advisable to work with suppliers who provide detailed safety data sheets (SDS) and offer guidance on safe usage.
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