Paint thinner

para-Dichlorobenzene

Parrafin oil

Parrafin wax

Pentane

1-Pentanol

Pentyl alcohol

Peptone

Petrolatum

Petroleum ether

Phenol

Phenolbenzene

Phenolphthalein 

Phenyl salicylate

Phenyl thiorea

Phthalic anhydride

Plaster of Paris

Platinum wire

Polyurethane foam system

Polyvinyl alcohol

Potash

Potassium bicarbonate

Potassium carbonate

Potassium chlorate

Potassium chloride

Potassium chromate

Potassium cyanide

Potassium dichromate

Potassium ferricyanide

Potassium hydroxide

Potassium iodate

Potassium iodide

Potassium nitrate

Potassium permanganate

Potassium phosphate

Potassium sodium tartrate

Potassium sulfate

Potassium thiocyanate

2-propanol (isopropyl alcohol)

Propane

Prpanoic acid / propionic acid

Propionic acid

Propylene glycol

Pumice