What Is It ?
I hope you remember when I told you that this old building was actually industrial complex and this room was part of it, before Cyrex686 rented this store room. This leads to a conclusion that this room was used as a storage room only. Many people from viewers also accepted this. But no one came with idea of room being used for waste and chemicals. According to them the room was “water cistern”. Cisterns were used to store rain water in earlier times and there was a possibility that this room served the said purpose.