Basic lead phosphite
Names
Other names
basic lead phosphonite
Identifiers
3D model (JSmol)
UN number 2989
  • InChI=1S/2HO3P.H2O.4O.6Pb/c2*1-4(2)3;;;;;;;;;;;/h2*1H;1H2;;;;;;;;;;/q2*-2;;;;;;;;;;2*+2
    Key: XTQIDVCLCLXOKX-UHFFFAOYSA-N
  • O.OP([O-])[O-].OP([O-])[O-].O=[Pb].O=[Pb].O=[Pb].O=[Pb].[Pb+2].[Pb+2]
Properties
H3O6PPb3
Molar mass 751.6 g·mol−1
Appearance white solid
Hazards
GHS labelling:
GHS02: FlammableGHS08: Health hazard
Danger
H228, H350, H360, H370, H372
P201, P202, P210, P240, P241, P260, P264, P270, P280, P281, P307+P311, P308+P313, P314, P321, P370+P378, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Basic lead phosphite is an inorganic compound with the proposed composition Pb3O(OH)2(HPO3).[1] The compound contains the phosphite anion, which provides the reducing properties associated with the application of this material.

It is widely used as a stabilizer for chlorine-containing polymers, especially polyvinylchloride.[2] Other lead phosphites are known, including normal lead phosphite, PbHPO3, although the basic salt is especially effective.[3]

References

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  1. ^ Grossman, Richard F.; Krausnick, Dale (1998). "The structure of lead stabilizers. 2: Basic salts of inorganic acids". Vinyl and Additive Technology. 4 (3): 179–181. doi:10.1002/vnl.10038. S2CID 95532627.
  2. ^ Bettermann, Gerhard; Krause, Werner; Riess, Gerhard; Hofmann, Thomas (2000). "Phosphorus Compounds, Inorganic". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a19_527. ISBN 978-3-527-30673-2..
  3. ^ Song, Jun-Ling; Hu, Chun-Li; Xu, Xiang; Kong, Fang; Mao, Jiang-Gao (2015). "Synthesis, crystal structures and properties of lead phosphite compounds". Journal of Solid State Chemistry. 231: 198–203. Bibcode:2015JSSCh.231..198S. doi:10.1016/j.jssc.2015.08.031.


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Phosphite (ion)

phosphite salt is basic lead phosphite. Many salts containing the phosphite ion have been investigated structurally, these include sodium phosphite pentahydrate

Phosphorous acid

production of basic lead phosphite, which is a stabilizer in PVC and related chlorinated polymers. It is used in the production of basic lead phosphonate

White phosphorus

possibly forming intermediate reducing compounds such as hypophosphite, phosphite, and phosphine. It damages the liver, kidneys, and other organs before

Organophosphate

Examples include the Atherton-Todd reaction, which converts a dialkyl phosphite to a phosphoryl chloride. This can then react with an alcohol to give

Oxyanion

written as O2S(OH)2; this is the molecule observed in the gas phase. The phosphite ion, PO3−3, is a strong base, and so always carries at least one proton

IARC group 2B

3'-Dimethylbenzidine (o-Tolidine) 1,1-Dimethylhydrazine Dimethyl hydrogen phosphite Dimethyl-p-toluidine 3,7-Dinitrofluoranthene 3,9-Dinitrofluoranthene 1

Hydrocyanation

hydrocyanation is commonly performed on alkenes catalyzed by nickel complexes of phosphite (P(OR)3) ligands. A general reaction is shown: RCH=CH2 + HCN → RCH2−CH2−CN

Polymer stabilizer

most commonly employed class are phosphite esters, often of hindered phenols e.g. Tris(2,4-di-tert-butylphenyl)phosphite. These will convert polymer hydroperoxides