Guanidinium chloride or guanidine hydrochloride, usually abbreviated GuHCl and sometimes GdnHCl or GdmCl, is the hydrochloride salt of guanidine.

Tris is widely used in the preparation of buffers in biochemistry and molecular biology experiments. In addition, Tris is the intermediate for the preparation of surfactants, vulcanization accelerators and some drugs.

HEPES (4-hydroxyethylpiperazine ethanesulfonic acid) is a non-ionic amphoteric buffer that is highly polar and inert to a wide range of chemicals and enzymes.

3 - morpholine propyl sulfonic acid is a kind of biological buffer, used in biochemical diagnostic kit, DNA/RNA extraction kit and PCR diagnostic kits

Biological buffer, used in biochemical diagnostic kit, DNA/RNA extraction kit and PCR diagnostic kits