1.08175
Thymolphthalein
pH indicator, ACS, Reag. Ph Eur
Synonym(s):
Thymolphthalein
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About This Item
Product Name
Thymolphthalein, indicator ACS,Reag. Ph Eur
grade
ACS reagent
Quality Level
agency
reag. Ph. Eur.
form
solid
loss
≤1% loss on drying, 110°C
color
white to almost white
visual transition interval
9.0-10.5, colorless to blue
mp
253 °C
bulk density
400 kg/m3
λmax
592-596 nm (buffer pH 10.5)
storage temp.
2-30°C
SMILES string
O1C(c4c(cccc4)C1=O)(c3c(cc(c(c3)C(C)C)O)C)c2c(cc(c(c2)C(C)C)O)C
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
Application
- Electrode Based on the MWCNTs and Electropolymerized Thymolphthalein for the Voltammetric Determination of Total Isopropylmethylphenols in Spices: This study developed a sensitive electrochemical sensor for quantifying thymol and carvacrol in spices using an electrode modified with multi-walled carbon nanotubes and electropolymerized thymolphthalein (Chernousova et al., 2023).
- Fluorescence Enhancement Mechanism of Thymolphthalein-Based Probe by Coordination Interaction with Zinc Ion: This research explored the fluorescence enhancement of a thymolphthalein-based probe through coordination with zinc ions, highlighting its potential in analytical applications (Huang et al., 2021).
- pH-Triggered Visual Detection of Escherichia coli Based on the Co-Assembly of Bacitracin and Thymolphthalein: This article presents a novel method for detecting E. coli through pH-triggered visual changes using a thymolphthalein and bacitracin-based probe (Lin et al., 2023).
- Bio-Thymol Containing New High-Performance Thymolphthalein-Based Polybenzoxazine: Thermal, Superhydrophobic and Dielectric Properties: The study reports on a new polybenzoxazine material incorporating thymolphthalein, showcasing enhanced thermal, hydrophobic, and dielectric properties (Srinivasan et al., 2023).
Analysis Note
Appearance: White to almost white powder, eventually slightly yellowish.
Clarity of solution (1 g/l; ethanol): passes test
Absorption maximum λmax. (buffer pH 10.5): 592 - 596 nm
Spec. Absorptivity A 1%/1cm (λmax; 0.01 g/l; buffer pH 10.5; calculated on anhydrous substance): 800 - 900
Transition range: pH 9.0 - pH 10.5 colourless - blue
Transition range (according to ACS): passes test
Transition interval (according Reag. Ph. Eur.): passes test
Loss on drying (110 °C): ≤ 1 %
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Storage Class
11 - Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
Certificates of Analysis (COA)
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