Embalm

This spell infuses the specimen and the water it is floating in with the alchemical ingredients which prevent it from decomposing for as long as it stays in the fluid. The spell will preserve any form of organic matter in the prepared solution and prevent it from decaying while it remains in the fluid. (The spell also effectively extends the time limit on raising the target from the dead, or using its remains for other spells, since days spent under the influence of this spell don’t count against the time limit of spells such as Raise Dead.) 

This spell is able to preserve a Medium sized amount of organic material.

The same creature or organic material that has already been preserved with this spell can be removed from, and placed back into, its fluid bath container without any further castings of the spell. However if a new specimen is going to be preserved the spell must be cast again using new water and alchemical ingredients. (Time spent outside the fluid bath does count against the time the creature has been dead, with time stopping again once it is re-submerged.)

 At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher you can increase the size of the creature or material that is being preserved. At 3rd level the spell can affect large specimens, at 4th sized Huge, and at 5th sized Gargantuan. For each additional level of the spell slot used above 2nd the cost in materials doubles.