Bleidiiodid Chemische Eigenschaften,Einsatz,Produktion Methoden
R-S?tze Betriebsanweisung:
R61:Kann das Kind im Mutterleib sch?digen.
R20/22:Gesundheitssch?dlich beim Einatmen und Verschlucken.
R33:Gefahr kumulativer Wirkungen.
R50/53:Sehr giftig für Wasserorganismen, kann in Gew?ssern l?ngerfristig sch?dliche Wirkungen haben.
R62:Kann m?glicherweise die Fortpflanzungsf?higkeit beeintr?chtigen.
S-S?tze Betriebsanweisung:
S53:Exposition vermeiden - vor Gebrauch besondere Anweisungen einholen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn m?glich, dieses Etikett vorzeigen).
S60:Dieses Produkt und sein Beh?lter sind als gef?hrlicher Abfall zu entsorgen.
S61:Freisetzung in die Umwelt vermeiden. Besondere Anweisungen einholen/Sicherheitsdatenblatt zu Rate ziehen.
Chemische Eigenschaften
Lead(II) iodide, also known as Lead Iodide, is a heavy, bright yellow, odorless powder. Photoelectrons are emitted when exposed to ultraviolet light, which is readily decomposed by light in the air. It is slightly soluble in hot water, slightly soluble in cold water and hot aniline, easily soluble in sodium thiosulfate solution, soluble in concentrated potassium iodide and concentrated sodium acetate solution, and insoluble in ethanol and cold concentrated hydrochloric acid. It reacts with sodium sulfide solution to form a lead sulfide precipitate. It reacts with alkali metal and alkaline earth metal carbonate solution to obtain lead carbonate precipitate.
Physikalische Eigenschaften
Yellow hexagonal crystals; density 6.16 g/cm
3; 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.
Verwenden
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.
synthetische
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.
Pb
2+(aq) + 2Iˉ (aq) → PbI
2(s).
Allgemeine Beschreibung
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 Reaktionen
Slightly water soluble.
Reaktivit?t anzeigen
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.
m?gliche Exposition
Lead iodide is used in bronzing, gold
pencils; mosaic gold; printing, and photography
Versand/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
l?uterung methode
It crystallises from a large volume of water. The solubility in H2O is 1.1% at ~10o, and 3.3% at ~ 100o.
Inkompatibilit?ten
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
Bleidiiodid Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
