I am conducting an organic synthesis experiment involving 2,3,5-tribromothiophene. The melting point of 2,3,5-tribromothiophene is about 25-28 ℃, so it melts easily during weighing. Whenever I weigh this compound, it melts soon and wet the weighing paper. So there arises big uncertainty in weight of compound. How can I weigh the compound that melts at room temperature and move it to the reactor with minimum loss? Is there no other way but to weigh as quickly as possible?