My friend told that toothpaste is an example for plasma state and it is because it is a semi solid.He said all semi solids are plasma

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    $\begingroup$ Your friend is, to put it mildly, about as wrong as this guy, only worse. Also, welcome to Chem.SE. $\endgroup$ – Ivan Neretin Jun 30 '16 at 12:53
  • $\begingroup$ @NilayGhosh Disagree. It's closely related, but that question nowhere asks about plasma. $\endgroup$ – hBy2Py Jun 30 '16 at 13:45
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    $\begingroup$ @hBy2Py the plasma theory of toothpaste is described in the comment section of the question. $\endgroup$ – Nilay Ghosh Jun 30 '16 at 13:52
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    $\begingroup$ @NilayGhosh But it doesn't show up in the question. If Simon-Nail-It had included it in the question body itself, then I would agree it deserves closure as a duplicate. But, comments are second-class content on SE sites, and so IMO the 'plasma' aspect doesn't count when considering whether the question is duplicative. <shrug> I'm fine with it if the community votes to close; I just would disagree. $\endgroup$ – hBy2Py Jun 30 '16 at 16:17
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    $\begingroup$ @IvanNeretin Is irony and analogy allowed in comments? But nice reply though. I think this questions is flawed and must be flagged. $\endgroup$ – shre_sudh_97 Jul 1 '16 at 6:58

This is categorically false.

I would consider toothpaste to be a highly viscous example of either a non-Newtonian fluid or a colloidal suspension.

On the other hand, plasmas exist as a mixed cloud of separated positive and negative ions, in many cases at extremely high temperature.

One would need extensive dental work after attempting to brush one's teeth with a plasma.

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    $\begingroup$ I agree. But whether it's a non-Newtonian fluid or a colloid suspension really depends on the brand. $\endgroup$ – orlando marinella Jun 30 '16 at 13:29
  • $\begingroup$ @orlandomarinella Yep, whether it's the paste type or the gel type. $\endgroup$ – hBy2Py Jun 30 '16 at 13:45
  • $\begingroup$ It was an attempt at humor. No problem! $\endgroup$ – orlando marinella Jun 30 '16 at 14:29
  • $\begingroup$ @orlandomarinella The content of your humorous addition was consistent with my intent, but I would prefer it to stand as originally written. We may be up against a debate about paste- versus gel-type toothpastes, however: I would argue that gel-type is the non-Newtonian fluid, whereas paste-type is the colloidal suspension. $\endgroup$ – hBy2Py Jun 30 '16 at 14:41
  • $\begingroup$ Perhaps, although it, again, depends on the exact formulation of the gel or paste. For example, in my drawer over here, I do have a gel toothpaste with the strange fleck-y bits, along with lumps of what's probably whitening abrasive. $\endgroup$ – orlando marinella Jun 30 '16 at 14:44

Absolutely wrong...!

This is absolutely wrong, toothpastes are not in plasma state. so what are toothpastes? A simple answer is; toothpastes are either pastes or gels. They are not solution because solute is not dissolved in the solvent. They are not suspensions because of ultra-high cocentration. So toothpastes are emulsions (two phased mixture). Toothpastes comprise an oil-water emulsion. And this form is used to stabilize the primary components of the toothpaste.

  • antiseptic/bacteriocidal component: this is contained in the aqueous phase of low viscosity it is capable of penetrating into the hollows of the teeth and gaps in the gums.
  • hydrogen peroxide part which is stabilized in the hydrophobic part of the emulsion.

Read Colloids and Emulsions for better understanding.

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