ChEBI

Any minor or unwanted substance introduced into the environment that can have undesired effects.

A substance (or active part thereof) that kills or slows the growth of bacteria.

Any substance that causes disturbance to organisms by chemical reaction or other activity on the molecular scale, when a sufficient quantity is absorbed by the organism.

A fluorescent dye used to stain biological specimens.

A dye used in microscopic or electron microscopic examination of cells and tissues to give contrast and to highlight particular features of interest, such as nuclei and cytoplasm.

A substance used locally on humans and other animals to destroy harmful microorganisms or to inhibit their activity (cf. disinfectants, which destroy microorganisms found on non-living objects, and antibiotics, which can be transported through the lymphatic system to destroy bacteria within the body).