Talk:Polyvinylpyrrolidone

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Untitled[edit]

Is there any reason PVPP has to be discussed here? I just noticed that PVPP's CAS provided by wikipedia is wrong, the correct CAS is 25249-54-1. I just don't know how to edit it myself, could someone do it please? — Preceding unsigned comment added by EdgarAvanesov (talkcontribs) 11:10, 12 April 2013 (UTC)

Yes, PVP's CAS is what is shown on this page. I attempted to add a 2nd CAS number, but it didn't show. Both PVP and PVPP have the same IUPAC name, but different CAS numbers. Does that warrant a separate page for PVPP? (There is a stub of a page for PVPP, linked to under the section on cross-linked derivatives on this page. I have updated the CAS number and IUPAC name on that page.) — Preceding unsigned comment added by InfoSharer (talkcontribs) 04:12, 27 May 2013 (UTC)

In accordance with Wikipedia:WikiProject_Drugs naming policy, I propose we move this page to the INN povidone. If you have any concern with this proposal, please discuss it on this page. Matt 18:09, 23 Dec 2004 (UTC)

Disagree: If this were an article about a drug then that would be sensible, but this is an article about a chemical that is widely used for many things; in the chemical industry and in chemistry (in which I work) it is known as poly(vinyl pyrrolidone) or quasi-systematic variations of that and not as povidone. I believe this is also the case in the food industry. As such, it this article should stay with the current name.

Me too (disagree)In chemistry, We call it PVP or polyvinyl pyrrolidone Mark —Preceding unsigned comment added by Saleemsan (talkcontribs) 21:28, 4 January 2008 (UTC)

--Also agree. It's used in so many fields besides drug manufacturing it really should have it's own page.

Are you sure Crospovidone is water soluble as stated in the page?

--Crospovidone (or PVPP) is not Soluble in water but that's exactly what the page says under the crosslinked section. Non cross linked, it is soluble in water as stated in the properties at the top of the page.

Does anybody has a source more significant than the cited vegan web page stating that PVPP is a dairy derivative? I can't find any other source that says the same. It might be that some PVPP formulations for enological use also contain dairy products. --Antifumo (talk) 01:04, 17 March 2008 (UTC)

Needs a section and references on allergic reactions.

The main section currently confuses povidone (water soluble polymer) and crospovidone (cross linked variant of polymer, water insoluble). These might very well have very different toxicities e.g. if injected —Preceding unsigned comment added by 152.91.9.170 (talk) 02:33, 8 May 2009 (UTC)

nonsense paragraph?[edit]

"The structure of a polymer greatly depends on its integrity and strength, formed through cross-links and bonds. Firstly, composition of polymers takes place through polymerisation of mers, many simple molecules that are repeating structural units called monomers. A single polymer molecule may consist of hundreds to a million monomers and may have a linear, branched, or network structure. Covalent bonds hold the atoms in the polymer molecules together and secondary bonds then hold groups of polymer chains together to form the polymeric material. Copolymers are polymers composed of two or more different types of monomers."

I don't think the above paragraph is specifically related to PVP, shall we delete it? LHcheM (talk) 10:29, 12 March 2012 (UTC)

Photo[edit]

Can we get a photo of the actual chemical? Badagnani (talk) 02:20, 29 November 2009 (UTC)

I will do it LHcheM (talk) 10:26, 12 March 2012 (UTC)

What is it made from?[edit]

What is it made from? Badagnani (talk) 02:21, 29 November 2009 (UTC)

Quite: a synthesis would be useful as it is alluded to but never explained. 193.132.159.169 (talk) 16:25, 13 January 2010 (UTC)

--It is used in at least one formula that I know of for tooth whitening. The ingredient list can be found here :http://www.gosmile.com/how_it_works?5 (Franarchist (talk) 14:32, 13 May 2010 (UTC))

Newtonian Viscosity?[edit]

Someone said this has properties of Newtonian viscosity in water. If this is true, I would like to see the concentration range across which it is true added; otherwise, it strikes me that this will much more likely behave in a non-newtonian way ... Zaphraud (talk) 04:53, 21 June 2010 (UTC)

The article seems to originally have been copied from the web. Unfortunately I am not able to find the place where the disputed statement came from. There are two possibilities:
  • From the cited sources and from the bottle in my hand I gather that Polyvinylpyrrolidone is at least nearly newtonian-viscous in water. That might be different to other highly viscous substances, which would be remarkable. In fact all other highly viscous substances I know of easily interact with themself in a distance-dependent manner; but this one seems to do only under special circumstances.
  • The viscosity also might be non-newtonian on it's own, but nearly or more newtonian in water. That would be an interesting albeit very insignificant detail.
Of course in both cases the verbalization in the article is misleading. Since there is some interesting maybe even important fact connected, I vote for leaving the sentence at it is (with the "dubious"-remark) until the facts are clear. -- Tomdo08 (talk) 12:34, 6 August 2010 (UTC)

Changed chembox too much?[edit]

I removed the "Hazards" section of the ChemBox because of a bad link, but I want to specify that I do see the need for a section regarding the possible dangers of this chemical. My only intention was to remove the bad link. Will attempt to fix the mistake, though I will leave the section blank for various reasons.Brooks bonkoksi (talk) 05:55, 2 February 2011 (UTC)

Well since I can't leave the ChemBox field blank it seems to me that the status quo is the least incorrect anyway. If somebody better at editing/citing sources would fix tihs for me it would be much appreciated.Brooks bonkoksi (talk) 06:06, 2 February 2011 (UTC)

Strong fluorescence[edit]

PVP has lately been found to be highly fluorescent, as stated in the following paper. I don't have time now to integrate the citation properly right now though.

Song, G., Lin, Y., Zhu, Z., Zheng, H., Qiao, J., He, C., & Wang, H. (2015). Strong fluorescence of poly(N-vinylpyrrolidone) and its oxidized hydrolyzate. Macromol Rapid Commun, 36(3), 278–285. http://doi.org/10.1002/marc.201400516 — Preceding unsigned comment added by 2001:67C:10EC:52C8:8000:0:0:F1C (talk) 12:13, 21 July 2016 (UTC)

Added fluorescence to properties box with citation. - InfoSharer (talk) 18:23, 27 September 2017 (UTC)

Dental Applications?[edit]

I received a disinfectant rinse from my dentist to help disinfect an oral abrasion. After purified water, the main ingredient was PVP. The product is named "Rincinol P.R.N." Can information from the package be added her as not original research? Jyg (talk) 22:07, 17 March 2018 (UTC)