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Thymol blue
Introduction
| Template:Chembox header | Thymol blue | |
|---|---|
| File:Thymol blue.png | |
| Template:Chembox header | General | |
| Systematic name | 4-[9-(4-hydroxy-2-methyl-5-propan-2-yl-phenyl)-7,7-dioxo-8-oxa-7λ6-thiabicyclo[4.3.0]nona-1,3,5-trien-9-yl]-5-methyl-2-propan-2-yl-phenol
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| CAS name | 4,4′-(3H-2,1-Benzoxathiol-3-ylidene)bis[5-methyl-2-(1-methylethyl)phenol]S,S-dioxide
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| Other names |
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| Molecular formula | C27H30O5S |
| SMILES | CC1=CC(=C(C=C1C2(C3=CC=CC=C3S(=O)(=O)O2)C4=CC(=C(C=C4C)O)C(C)C)C(C)C)O
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| Molar mass | 466.59[1] g mol−1 |
| Appearance | Brownish-green crystal powder |
| CAS number | [76-61-9] |
| Template:Chembox header | Properties | |
| Solubility in water | Insoluble |
| In alcohol | Soluble |
| In dilute alkali solutions | Soluble |
Thymol blue is a brownish-green crystal powder that is used as an pH indicator. It is insoluble in water but soluble in alcohol and dilute alkali solutions. It transitions from red to yellow at pH 1.2–2.8 and from yellow to blue from at pH 8.0–9.6.
Bibliography
Bibliography
- Merck. “Thymol Blue.” The Merck Index. 14th ed. 2006. Accessed via web on 2007-02-25.