For faster navigation, this Iframe is preloading the Wikiwand page for Thymolphtaléine.

Thymolphtaléine

Thymolphtaléine
Image illustrative de l’article Thymolphtaléine
Forme acide de la thymolphtaléine
Identification
No CAS
No ECHA 100.004.300
No CE 204-729-7
SMILES
InChI
Apparence cristaux blancs
Propriétés chimiques
Formule C28H30O4  [Isomères]
Masse molaire[1] 430,535 4 ± 0,025 7 g/mol
C 78,11 %, H 7,02 %, O 14,86 %,
pKa 10,1
Propriétés physiques
fusion 251 à 253 °C
Solubilité 1 g·L-1 dans l'eau à 20 °C

Unités du SI et CNTP, sauf indication contraire.

La thymolphtaléine est un indicateur de pH. Sa zone de virage se situe entre pH 9,3 et pH 10,5. Elle est incolore en milieu acide et bleue en milieu basique. Une autre zone de virage peu connue se situe en milieu très acide pH ≈ 0 de couleur rouge.

Couleurs de la thymolphtaléine forme acide
incolore
zone de virage
pH 9.3 à pH 10.5
forme basique
bleu
Couleurs de la thymolphtaléine forme très acide
rouge
zone de virage
pH 0 à pH 9,3
forme acide
incolore

Notes et références

[modifier | modifier le code]
  1. Masse molaire calculée d’après « Atomic weights of the elements 2007 », sur www.chem.qmul.ac.uk.
{{bottomLinkPreText}} {{bottomLinkText}}
Thymolphtaléine
Listen to this article

This browser is not supported by Wikiwand :(
Wikiwand requires a browser with modern capabilities in order to provide you with the best reading experience.
Please download and use one of the following browsers:

This article was just edited, click to reload
This article has been deleted on Wikipedia (Why?)

Back to homepage

Please click Add in the dialog above
Please click Allow in the top-left corner,
then click Install Now in the dialog
Please click Open in the download dialog,
then click Install
Please click the "Downloads" icon in the Safari toolbar, open the first download in the list,
then click Install
{{::$root.activation.text}}

Install Wikiwand

Install on Chrome Install on Firefox
Don't forget to rate us

Tell your friends about Wikiwand!

Gmail Facebook Twitter Link

Enjoying Wikiwand?

Tell your friends and spread the love:
Share on Gmail Share on Facebook Share on Twitter Share on Buffer

Our magic isn't perfect

You can help our automatic cover photo selection by reporting an unsuitable photo.

This photo is visually disturbing This photo is not a good choice

Thank you for helping!


Your input will affect cover photo selection, along with input from other users.

X

Get ready for Wikiwand 2.0 🎉! the new version arrives on September 1st! Don't want to wait?