Lead phosphate

Structural formula
${\displaystyle \mathrm {\ {\Biggl [}} }$ ${\displaystyle \mathrm {\ \!\ {\Biggr ]}_{2}} }$
General
Surname	Lead phosphate
other names	Tribleibis (orthophosphate) Lead (II) phosphate
Molecular formula	Pb 3 (PO 4 ) 2
Brief description	white solid
External identifiers / databases
CAS number 7446-27-7 EC number 231-205-5 ECHA InfoCard 100.028.368 PubChem 16685997 ChemSpider 22442 Wikidata Q883666
properties
Molar mass	811.5 g mol −1
Physical state	firmly
density	6.9-7.3 g cm -3
Melting point	1014 ° C
solubility	practically insoluble in water
safety instructions
GHS hazard labeling from  Regulation (EC) No. 1272/2008 (CLP) , expanded if necessary danger H and P phrases H: 360Df-373-410 P: ?
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Lead phosphate is a chemical compound from the group of phosphates .

Occurrence

In the event of poisoning with lead or its compounds, this is deposited in the bones in the form of lead phosphate. When released in nature, lead shows a pronounced tendency to accumulate in the soil, which means that it can also be found there as poorly soluble lead phosphate if it is contaminated.

Extraction and presentation

Lead phosphate can be obtained by reacting lead acetate or lead nitrate with sodium phosphate .

${\displaystyle \mathrm {3\ Pb(NO_{3})_{2}+2\ Na_{3}PO_{4}\ \longrightarrow \ Pb_{3}(PO_{4})_{2}+6\ NaNO_{3}} }$

safety instructions

Lead phosphate is classified as carcinogenic category 2 and germ cell mutagenic category 3A.

See also

• Hydroxypyromorphite Pb ₅ (PO ₄ ) ₃ OH
• Pyromorphite Pb ₅ Cl (PO ₄ ) ₃
• Anglesite PbSO ₄

Individual evidence

1. ↑ ^{a b c d e} Entry for CAS no. 7446-27-7 in the GESTIS substance database of the IFA , accessed on June 7, 2017(JavaScript required) .
2. ↑ Entry on Trilead bis (orthophosphate) in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on June 7, 2017. Manufacturers or distributors can expand the harmonized classification and labeling .
3. ^ University of Rostock - Institute for Occupational Medicine: Leaflet on BK No. 1101: Diseases caused by lead or its compounds ( Memento from July 30, 2014 in the Internet Archive ).
4. ↑ Food chemistry institute of the Federal Association of the German Confectionery Industry: Interesting facts about the heavy metal lead. in: SWEETS (2007) issue 11.