Phenolphthalein

Build a molecular structure model of the pH indicator Phenolphthalein using Genuine Molymod Model Parts by Indigo

What is Phenolphthalein?

As an indicator, phenolphthalein's pH range is between 8.2-12 where it changes from colorless to pink/fucshia. In very acidic solutions near pH 0 phenolphthalein appears orange.

Phenolphthalein's uses include the Kastle-Meyer test for blood where the presence of hemoglobin causes the indicator solution to turn pink.

The phenolphthalein structure is a is good example of a C3 Point Group & shows "propeller" rotation. It was discovered in 1871 by German chemist Adolf von Baeyer & was commonly used as laxative until it was discovered to be a carcinogen.

Chemical data
Molecular Weight Chemical Formula
318.3282 C20H14O4

Phenolphthalein is also known as Phenolphthalein, pH indicator, base indicator, fuchsia, Phenolphthalein molecule, Phenolphthalein 3d, Phenolphthalein model

Model Sets That Can Build Phenolphthalein

Hybrid Dome
62053 62053SP 62050
Open Sphere
62009 62009EX 62010 62003 62004
Closed Dome
62053 62053SP 62007 62050
Closed Sphere
62003 62053 62053SP
Parts Synonyms
Parts
P/NDescriptionQTY
60150EAtom, Molymod, white (hydrogen), hemisphere, 19mm14
60200EAtom, Molymod, red (oxygen), 2 hole, 105 degrees4
60400EAtom, Molymod, black (carbon), 4 hole, 109.5 degrees, 23mm20
61012EBond, Molymod, grey (single), 20mm17
61013EBond, Molymod, grey (double/triple), 35mm20
61015EBond, Molymod, opaque, 2mm (for spacefilling models)14
Synonyms
3,3-bis(4-hydroxyphenyl)-2-benzofuran-1-one , 3,3-bis(4-hydroxyphenyl)isobenzofuran-1-one , 3,3-bis(4-hydroxyphenyl)-1-isobenzofuranone , 467-29-8 , 57214-20-7 , 77-09-8 , C14286 , NSC215214 , component of Feen-A-Mint Pills , KBioSS_001557 , P9750_SIAL , KBio2_001557 , KBio2_004125 , ZINC03831317 , KBio2_006693 , MLS000069592 , NCGC00023694-06 , Spectrum4_000982 , NINDS_000929 , 34605_RIEDEL , Evac-Q-Kit , 34606_RIEDEL , NCGC00023694-03 , alpha-(p-Hydroxyphenyl)-alpha-(4-oxo-2,5-cyclohexadien-1-ylidene)-o-toluic acid , 34607_RIEDEL , SBB008868 , DivK1c_000929 , EU-0082600 , BSPBio_002518 , 3,3-bis(4-hydroxyphenyl)-2-benzofuran-1(3H)-one , BCBcMAP01_000174 , Spectrum2_001279 , SPBio_001278 , SPECTRUM1500480 , KBio3_001776 , SMR000059015 , NCGC00023694-04 , NCGC00023694-05 , Spectrum3_000888 , 1(3H)-Isobenzofuranone, 3,3-bis(4-hydroxyphenyl)- , 3,3-Bis(4-hydroxyphenyl)phthalide , 3,3-Bis(p-hydroxyphenyl)phthalide , Chocolax , Espotabs , 3,3-Bis(4-hydroxyphenyl)-1(3H)-isobenzofuranone , 5-18-04-00188 (Beilstein Handbook Reference) , AI3-09081 , Agoral , Alophen , BRN 0284423 , CCRIS 6266 , Colax , Correctol , Phthalide 3,3,-bis(p-hydroxyphenyl)- , Phthalimetten , Purga , Purgophen , Spulmako-lax , Trilax , WLN: T56 BVO DHJ D- D-/R DQ 2 , component of Agoral , component of Correctol , Ex-Lax , Feen-A-Mint Laxative Mints , FemiLax , Fenolftalein [Czech] , Fenolftaleina [INN-Spanish] , HSDB 4161 , Lax-Pills , Laxin , Medilax , NSC 10464 , Phenolphtaleine [INN-French] , Phenolphthalein [USAN:BAN:INN] , Phenolphthaleinum [INN-Latin] , Phthalin , Purgen , Euchessina , alpha-Di(p-hydroxyphenyl)phthalide , InChI=1/C20H14O4/c21-15-9-5-13(6-10-15)20(14-7-11-16(22)12-8-14)18-4-2-1-3-17(18)19(23)24-20/h1-12,21-22 , Feen-A-Mint Gum , ARONIS002962 , Spectrum_001077 , 319236_SIAL , Phenolphthalein solution , 37167_RIEDEL , Phenolphthalein Paper , Koprol , Laxogen , 105945_SIAL , Lilo , IDI1_000929 , NSC10464 , 33518_RIEDEL , Phenolax , Phenolphthalein , Dihydroxyphthalophenone , 16019_RIEDEL , KBio1_000929 , Spectrum5_001268 , EINECS 201-004-7 , AIDS-018072 , AIDS018072 , D05456 , Modane (TN) , Phenolphthalein (INN) , Evac-Q-Kwik , SMP1_000235 , Evac-Q-Tabs , Evac-U-Gen , KBioGR_001383 , NCI-C55798 , Evac-V-Lax