114545

Thymol Blue

ACS reagent

• Synonym(s): Thymolsulfonphthalein
• Empirical Formula (Hill Notation): C₂₇H₃₀O₅S
• CAS Number: 76-61-9
• Molecular Weight: 466.59
• Beilstein: 368036
• EC Number: 200-973-3
• MDL number: MFCD00005869
• UNSPSC Code: 12171500
• PubChem Substance ID: 24847181
• NACRES: NA.47

Properties

• grade: ACS reagent
• Quality Level: 200
• form: powder
• clarity of soln: passes test
• technique(s): titration: suitable
• visual transition interval: 1.2-2.8, red to yellow(acid range); 1.2-2.8, red to yellow; 8.0-9.2, yellow to blue(alkaline range); 8.0-9.2, yellow to blue
• mp: 221-224 °C (dec.) (lit.)
• solubility: ethanol: 0.1%, clear
• density: 0.979 g/cm³
• λmax: 376 nm (2nd); 594 nm
• ε (extinction coefficient): ≥12000 at 298-302 nm in 0.1 M NaOH at 0.01 g/L
• application(s): diagnostic assay manufacturing; hematology; histology
• storage temp.: room temp
• SMILES string: CC(C)c1cc(c(C)cc1O)C2(OS(=O)(=O)c3ccccc23)c4cc(C(C)C)c(O)cc4C
• InChI: 1S/C27H30O5S/c1-15(2)19-13-22(17(5)11-24(19)28)27(21-9-7-8-10-26(21)33(30,31)32-27)23-14-20(16(3)4)25(29)12-18(23)6/h7-16,28-29H,1-6H3
• InChI key: PRZSXZWFJHEZBJ-UHFFFAOYSA-N

Description

General description

Thymol Blue is a sulfonephthalein dye. It is also known as thymolsulfonphthalein.

Application

Thymol Blue has been used for the in situ spectrophotometric pH measurement.

Biochem/physiol Actions

Thymol Blue is a pH indicator, which is yellow/orange at low pH and blue in color at high pH.

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