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| | Lead(II) iodide Chemical Properties |
| Melting point | 402 °C(lit.) | | Boiling point | 954 °C(lit.) | | density | 6.16 g/mL at 25 °C(lit.) | | Fp | 954°C | | storage temp. | Keep in dark place,Inert atmosphere,Room temperature | | solubility | Soluble in concentrated solutions of alkali iodides and sodium thiosulfate. Insoluble in alcohol and cold hydrochloric acid. | | form | beads | | color | Yellow to orange | | Specific Gravity | 6.16 | | Water Solubility | Partially soluble in water. Freely soluble in sodium thiosulfate solution. Soluble in concentrated solutions of alkali iodides. Insoluble in alcohol and cold HCl.Soluble in concentrated solutions of alkali iodides and sodium thiosulfate. Insoluble in alcohol and cold hydrochloric acid. | | Hydrolytic Sensitivity | 0: forms stable aqueous solutions | | λmax | 539nm(neat)(lit.) | | Sensitive | Light Sensitive | | Merck | 14,5411 | | Solubility Product Constant (Ksp) | pKsp: 8.01 | | Exposure limits | ACGIH: TWA 0.05 mg/m3; TWA 0.01 ppm
NIOSH: IDLH 100 mg/m3; TWA 0.050 mg/m3 | | Stability: | Stable. May discolour upon exposure to light. | | InChIKey | RQQRAHKHDFPBMC-UHFFFAOYSA-L | | CAS DataBase Reference | 10101-63-0(CAS DataBase Reference) | | NIST Chemistry Reference | Lead diiodide(10101-63-0) | | EPA Substance Registry System | Lead(II) iodide (10101-63-0) |
| | Lead(II) iodide Usage And Synthesis |
| Description | Lead (II) iodide (chemical formula: PbI) is a kind of inorganic
salt. It appears as a bright yellow crystalline solid. It has some
special applications such as the manufacture of solar cells, X-rays,
and gamma-ray detectors. In addition, it can also be used as a paint
pigment for being used in art for bronzing and in gold-like mosaic
tiles. It can be commonly synthesized through a double displacement
reaction between potassium iodide KI and lead (II) nitrate Pb(NO3)2
in water solution. Lead (II) acetate and sodium iodide can also be
used as the substitute of lead nitrate and potassium iodide,
respectively. Alternatively, it can be manufactured through the
reaction between iodine vapor and the molten lead. It is also used
in printing and photography. However, it is hazard to the
environment, and should be taken care of to limit spread to the
environment. | | References | https://en.wikipedia.org/wiki/Lead(II)_iodide
https://pubchem.ncbi.nlm.nih.gov/compound/Lead_II__iodide#section=Top
| | Chemical Properties | Lead iodide is a heavy, bright-yellow, odorless
powder. | | Physical properties | Yellow hexagonal crystals; density 6.16 g/cm3; melts at 402°C; vaporizes at 954°C; decomposes at 180°C when exposed to green light; slightly soluble in water (0.44 g/L at 0°C and 0.63 g/L at 20°C); Ksp 8.49x10-9 at 25°C; partially soluble in boiling water (4.1 g/L at 100°C); insoluble in ethanol; soluble in alkalis and alkali metal iodide solutions. | | Uses | Lead(II) iodide is used as a detector material for high energy photons including x-rays and gamma rays. It is used in photography, printing, mosaic gold, and bronzing. It exhibits ferroelastic properties and has efficiency in stopping X-ray and gamma ray, which provides excellent environmental stability. | | Uses | Used in bronzing, printing, photography, gold pencils, and mosaic gold. | | Preparation | Lead diiodide is prepared by mixing aqueous solutions of lead nitrate or lead acetate with an aqueous solution of potassium or sodium iodide or hydriodic acid, followed by crystallization. The product is purified by recrystallization.
Pb2+(aq) + 2Iˉ (aq) → PbI2(s). | | General Description | Lead iodide appears as a yellow crystalline solid. Insoluble in water and denser than water. Primary hazard is threat to the environment. Immediate steps should be taken to limit spread to the environment. Used in printing and photography, to seed clouds and other uses. | | Air & Water Reactions | Slightly water soluble. | | Reactivity Profile | Lead(II) iodide has weak oxidizing or reducing powers. Redox reactions can however still occur. The majority of compounds in this class are slightly soluble or insoluble in water. If soluble in water, then the solutions are usually neither strongly acidic nor strongly basic. These compounds are not water-reactive. Light sensitive | | Hazard | Lead diiodide is toxic if ingested. The symptoms are those of lead poisoning. | | Health Hazard | Early symptoms of lead intoxication via inhalation or ingestion are most commonly gastrointestinal disorders, colic, constipation, etc.; weakness, which may go on to paralysis, chiefly of the extensor muscles of the wrists and less often the ankles, is noticeable in the most serious cases. Ingestion of a large amount causes local irritation of the alimentary tract. Pain, leg cramps, muscle weakness, paresthesias, depression, coma, and death may follow in 1 or 2 days. Contact with eyes causes irritation. | | Potential Exposure | Lead iodide is used in bronzing, gold
pencils; mosaic gold; printing, and photography | | Shipping | UN3288 Toxic solids, inorganic, n.o.s., Hazard
Class: 6.1; Labels: 6.1-Poisonous materials, Technical Name
Required. UN3077 Environmentally hazardous substances,
solid, n.o.s., Hazard class: 9; Labels: 9-Miscellaneous hazardous material, Technical Name Required | | Purification Methods | It crystallises from a large volume of water. The solubility in H2O is 1.1% at ~10o, and 3.3% at ~ 100o. | | Incompatibilities | Lead iodide has weak oxidizing or
reducing powers. Redox reactions can however still occur.
The majority of compounds in this class are slightly soluble
or insoluble in water. If soluble in water, then the solutions
are usually neither strongly acidic nor strongly basic. These
compounds are not water-reactive. Light sensitive
Contact with oxidizers or active metals may cause violent
reaction |
| | Lead(II) iodide Preparation Products And Raw materials |
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