An environmentally-clean fire inhibiting liquid biochemical composition for application on combustible surfaces to inhibit fire ignition and flame spread in the presence of fire. The environmentally-clean fire inhibiting liquid biochemical composition includes: a dispersing agent realized in the form of a quantity of water, for dispersing potassium ions dissolved in the water; a fire inhibiting agent realized in the form of potassium citrate, for providing potassium ions dispersed in the water when the potassium citrate is dissolved in the water; and a coalescing agent realized in the form of triethyl citrate, an ester of citric acid, for dispersing and coalescing the potassium ions when the fire inhibiting liquid composition is applied to a combustible surfaces to be protected against fire ignition and flame spread, and while water molecules in the water evaporate during drying, the potassium ions cooperate to form a thin potassium salt crystalline coating on the treated combustible surface that proactively protects the treated combustible surfaces against fire ignition and flame spread, in the presence of fire.