89360

Thymolphthalein

ACS reagent, indicator (pH 8.8-10.5)

• Synonym(s): 5′,5′′-Diisopropyl-2′,2′′-dimethylphenolphthalein
• Empirical Formula (Hill Notation): C₂₈H₃₀O₄
• CAS Number: 125-20-2
• Molecular Weight: 430.54
• Beilstein: 359413
• EC Number: 204-729-7
• MDL number: MFCD00005909
• UNSPSC Code: 12000000
• PubChem Substance ID: 329769727
• NACRES: NA.21

Properties

• grade: ACS reagent; indicator (pH 8.8-10.5)
• Quality Level: 200
• form: solid
• technique(s): UV/Vis spectroscopy: suitable; titration: suitable
• ign. residue: ≤1%
• mp: 248-254 °C; 251-253 °C (lit.)
• SMILES string: CC(C)c1cc(c(C)cc1O)C2(OC(=O)c3ccccc23)c4cc(C(C)C)c(O)cc4C
• InChI: 1S/C28H30O4/c1-15(2)20-13-23(17(5)11-25(20)29)28(22-10-8-7-9-19(22)27(31)32-28)24-14-21(16(3)4)26(30)12-18(24)6/h7-16,29-30H,1-6H3
• InChI key: LDKDGDIWEUUXSH-UHFFFAOYSA-N

Description

General description

Thymolphthalien is an acid-base indicator which is colourless in acidic form and deep blue in basic form. Acidic form retains hydrogen on each hydroxyl group. It is suitable in preparing disappearing ink.

Application

Thymolphthalein was suitable as indicator during titration of hyamine hydroxide.

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves