Lead(II) chloride is an inorganic compound which is a white solid under ambient conditions. It is poorly soluble in water. Lead(II) chloride is one of the most important lead-based reagents. It also occurs naturally in the form of mineral cotunnite.

Lead selenide is a semiconductor material. It forms cubic crystals of the NaCl structure. It has a direct bandgap of 0.27 eV at room temperature. It is a grey crystalline solid material.

Lithium bromide or LiBr, is a chemical compound of lithium and bromine. Its extreme hygroscopic character makes LiBr useful as a desiccant in certain air conditioning systems.

It is lithium salt of nitric acid. It is made by reacting lithium carbonate or lithium hydroxide with nitric acid.This deliquescent colourless salt is an oxidizing agent used in the manufacture of red-coloured fireworks and flares.

Lithium iodide is a compound of lithium and iodine. When exposed to air, it becomes yellow in colour due to the oxidation of iodide to iodine. It is used as an electrolyte for high temperature batteries. It is also used for long life batteries as required by artificial pacemakers.

Magnesium oxide is a white solid mineral that occurs naturally as periclase and is a source of magnesium. It is hygroscopic in nature. MgO is one of the raw materials for making Portland cement in dry process plants.

Mercury sulfide is a chemical compound composed of the chemical elements mercury and sulfur. It is virtually insoluble in water.It is used as a red pigment when it is known as vermilion.

Molybdenum trioxide is a chemical compound with the formula MoO₃. It occurs as the rare mineral molybdite. Its chief application is as an oxidation catalyst and as a raw material for the production of molybdenum metal.

Mercury(I) chloride is also known as calomel. This dense white or yellowish-white, odourless solid is the principal example of a mercury(I) compound. It is a component of reference electrodes in electrochemistry.

Lead(II) nitrate is an inorganic compound with the chemical formula Pb(NO₃)₂. It commonly occurs as a colourless crystal or white powder and unlike most other lead(II) salts, it is soluble in water.Lead(II) nitrate is toxic and an oxidising agent and is categorised as probably carcinogenic to humans.

The nickel-iron battery (NiFe battery) is a storage battery having a nickel(III) oxide-hydroxide cathode and an iron anode, with an electrolyte of potassium hydroxide. The active materials are held in nickel-plated steel tubes or perforated pockets.

Nickel(II) hydroxide is an insoluble compound commonly used in rechargeable battery electrodes. When charged these electrodes form nickel(III) oxide-hydroxide. Nickel(II) hydroxide is a precipitate formed when the hexaaquanickel(II) ion is mixed with aqueous alkali.

Nitric oxide is an important cell signaling molecule in mammals, including humans. Nitric oxide is an air pollutant produced by combustion of substances in air, like in automobile engines and fossil fuel power plants.

Palladium(II) nitrate is a red-brown solid that is strongly oxidizing and may liberate noxious fumes upon reaction with reducing agents. It is a skin and respiratory irritant. It is normally stable at room temperature but decomposes at higher temperatures.

Pentaborane is a colourless mobile liquid with a strong pungent odour (resembling garlic, acetylene or sour milk). In the 1950s it was considered as a good prospect for rocket or jet fuel. Its chemical structure is that of five atoms of boron compounded with nine atoms of hydrogen (B₅H₉).

Phenylphosphine is a primary phosphine. It is the phosphorus analog of aniline. Like all other primary phosphines, phenylphosphine has an intense penetrating odour. It is highly oxidizable, it can function as ligands in complexes, and it is highly nucleophilic.

Phosphorus tribromide is a colourless liquid with the formula PBr₃. It fumes in air due to hydrolysis and has a penetrating odour. It is widely used in a laboratory for the conversion of alcohols to alkyl bromides.

Phosphorous acid is a compound with the formula H₃PO₃. This acid is diprotic (readily ionizes two protons), not triprotic as might be suggested by this formula. Phosphorous acid is as an intermediate in the preparation of other phosphorus compounds.

Plutonium(IV) oxide is the chemical compound with the formula PuO₂. This high melting point solid is a principal compound of plutonium. PuO₂ is used in MOX fuels for nuclear reactors. Plutonium-238 dioxide is used as fuel for several deep-space spacecraft such as the 'New Horizons' Pluto probe.

Potassium permanganate is an inorganic chemical compound with the formula KMnO₄. Formerly known as permanganate of potash or Condy's crystals, it is a strong oxidizing agent. It dissolves in water to give intensely purple solutions, the evaporation of which leaves prismatic purplish-black glistening crystals.

Potassium ferrioxalate is an octahedral transition metal complex in which three bidentate oxalate ions are bound to an iron center. Potassium acts as a counterion, balancing the -3 charge of the complex.

Phosphorus pentasulfide is an inorganic compound with the formula P₄S₁₀. This yellow solid is the one of two phosphorus sulfides of commercial value. Samples often appear greenish-gray due to impurities. It is also used in the production of pesticides such as Parathion and Malathion.

Potassium nitrate occurs as a mineral niter and is a natural solid source of nitrogen. Major uses of potassium nitrate are in fertilizers, rocket propellants and fireworks. It is one of the constituents of gunpowder.

The chemical compound potassium chloride (KCl) is a metal halide salt composed of potassium and chlorine. In its pure state, it is odourless and has a white or colourless vitreous crystal appearance.The majority of potassium chloride produced is used for making fertilizer, since the growth of many plants is limited by their potassium intake.

Radium chloride is a white solid with a blue-green luminescence, especially when heated. It is less soluble in water than other alkaline earth metal chlorides. It is still used in the initial stages of the separation of radium from barium during the extraction of radium from pitchblende.