Non-hygroscopic crystals of p-aminomethylbenzoic acid and process for preparing the same

摘要

The novel non-hygroscopic crystals of p-aminomethylbenzoic acid can be obtained by heating hygroscopic crystals of p-aminomethylbenzoic acid while keeping the hygroscopic crystals in contact with moisture to transform the hygroscopic crystals to non-hygroscopic crystals. The non-hygroscopic crystals of p-aminomethylbenzoic acid can be particularly advantageously handled in the atmosphere as compared with the conventional hygroscopic crystals. Especially when the p-aminomethylbenzoic acid is used for the non-aqueous reaction, the crystals of the invention are exceptionally advantageous from the viewpoints of removal of moisture and humidity control.