Thymol blue

Thymol blue

Chembox new
Name = Thymol blue
ImageFile = Thymolblau skeletal.png ImageSize = 225px
IUPACName = 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
OtherNames = α-hydroxy-α,α-bis(5-hydroxycarvacryl)- o-toluenesulfonic acid γ-sultone; thymolsulfonephthalein
Section1 = Chembox Identifiers
CASNo = 76-61-9
Section2 = Chembox Properties
Formula = C27H30O5S
MolarMass = 466.59 [Number derived from molecular weight] g mol−1
Appearance = Brownish-green crystal powder
Solubility = Insoluble

Thymol blue (thymolsulphonephthalein) is a brownish-green or reddish-brown crystaline 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

* Merck. "Thymol Blue." "The Merck Index". 14th ed. 2006. Accessed via web on 2007-02-25.

References

External links

* [http://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=65565 PubChem entry]


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Look at other dictionaries:

  • thymol blue — n a greenish crystalline compound C27H30O5S derived from thymol and used as an acid base indicator * * * an indicator, thymolsulfonphthalein, with an acid pH range of 1.2 to 2.8, being red at 1.2 and yellow at 2.8, and an alkaline pH range of 8.0 …   Medical dictionary

  • thymol blue — noun : a greenish crystalline compound C27H30O5S of the sulfonephthalein series derived from thymol and used as an acid base indicator …   Useful english dictionary

  • thymol blue — /ˌθaɪmɒl ˈblu/ (say .thuymol blooh) noun a brown green powder or crystals, C27H30O5S, used as an acid base indicator in pH range 8.0 (yellow) to 9.6 (blue) …  

  • thymol blue — noun thymolsulphonephthalein …   Wiktionary

  • thymol — A phenol present in the volatile oil of Thymus vulgaris (thyme), Monarda punctata (horsemint), and other volatile oils; used externally and internally as an antiseptic, as a deodorizer of offensive discharges, and as a specific for… …   Medical dictionary

  • Bromothymol blue — Bleu de bromothymol Pour les articles homonymes, voir BBT et BTB. Bleu de bromothymol[1] …   Wikipédia en Français

  • bromthymol blue — noun Date: 1920 a dye derived from thymol that is an acid base indicator called also bro•mo•thy•mol blue …   New Collegiate Dictionary

  • pH indicator — Acids and Bases Acid dissociation constant Acid base extraction Acid–base reaction Acid–base titration Dissociation constant Acidity function Buffer sol …   Wikipedia

  • pH — For other uses, see PH (disambiguation). Acids and Bases Acid dissociation constant Acid base extraction Acid–base reaction Acid–base titration Dissociation c …   Wikipedia

  • Phenolphthalein — IUPAC name 3,3 bis(4 hydroxyphenyl)isobenzofuran 1(3H) one …   Wikipedia

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