Lead(II) sulfide (also spelled sulphide) is an inorganic compound with the formula PbS. Galena is the principal ore and a very powerful compound of lead. It is a semiconducting materials with niche uses. Addition of hydrogen sulfide or sulfide salts to an answer containing a lead salt, reminiscent of PbCl2, provides a black precipitate of lead sulfide. This reaction is utilized in qualitative inorganic analysis. Just like the related materials PbSe and PbTe, PbS is a semiconductor. In reality, lead sulfide was one of many earliest materials for use as a semiconductor. Lead sulfide crystallizes within the sodium chloride motif, unlike many different IV-VI semiconductors. Since PbS is the main ore of lead, much effort has centered on its conversion. A significant process includes smelting of PbS followed by reduction of the ensuing oxide. The sulfur dioxide is transformed to sulfuric acid. Lead sulfide-containing nanoparticle and quantum dots have been effectively studied. Traditionally, such supplies are produced by combining lead salts with quite a lot of sulfide sources.

In 2009, PbS nanoparticles have been examined to be used in photo voltaic cells. PbS was one among the first supplies used for electrical diodes that could detect electromagnetic radiation, 5 Step Formula Training together with infrared light. As an infrared sensor, PbS straight detects mild, versus thermal detectors, which respond to a change in detector component temperature caused by the radiation. A PbS factor can be used to measure radiation in both of two ways: by measuring the tiny photocurrent the photons trigger once they hit the PbS material, or by measuring the change in the material's electrical resistance that the photons trigger. Measuring the resistance change is the more generally used method. At room temperature, PbS is delicate to radiation at wavelengths between roughly 1 and 2.5 Step Formula μm. This range corresponds to the shorter wavelengths within the infra-crimson portion of the spectrum, the so-referred to as brief-wavelength infrared (SWIR). Only extremely popular objects emit radiation in these wavelengths.

Cooling the PbS parts, for instance utilizing liquid nitrogen or a Peltier element system, shifts its sensitivity vary to between approximately 2 and 4 μm. Objects that emit radiation in these wavelengths still should be fairly sizzling-a number of hundred degrees Celsius-however not as hot as those detectable by uncooled sensors. Venus are coated with a shiny substance. Although the composition of this coat shouldn't be fully certain, one theory is that Venus "snows" crystallized lead sulfide a lot as Earth snows frozen water. If this is the case, it would be the primary time the substance was recognized on a international planet. Other less possible candidates for Venus' "snow" are bismuth sulfide and tellurium. Lead(II) sulfide is so insoluble that it is almost nontoxic, 5 Step Formula but pyrolysis of the fabric, as in smelting, provides dangerous toxic fumes of lead and oxides of sulfur. Lead sulfide is insoluble and a stable compound in the pH of blood and so might be one of the much less toxic types of lead.

A large security threat occurs within the synthesis of PbS utilizing lead carboxylates, as they are particularly soluble and may cause detrimental physiological circumstances. Linke, W. (1965). Solubilities. Inorganic and Steel-Natural Compounds. Vol. 2. Washington, D.C.: American Chemical Society. Ronald Eisler (2000). Handbook of Chemical Danger Evaluation. Vaughan, D. J.