Nephentesion No. 7

Nephentesion No. 7 (タンパク質溶解液) is a chemical used by DA.

Principles
It is a protein solvent that can apparently be used in destroying corpses. DA uses the chemical substance to destroy corpses in order to cut their connection to them.

In the anime, the chemical is a blue-colored liquid.

Necromancer Arc
DA attempted to use the chemical on Hitokawa Hasami but were prevented from doing so by the return of Accelerator, who was waiting to catch them in the act. In the anime adaptation, Accelerator secretly took the Nephentesion No. 7 from the DA members as he left, before throwing the liquid towards them on returning.