Difference between revisions of "Thymol blue"
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[[[SliderGallery rightalign|thymol blue.jpg~Chemical structure]]] | [[[SliderGallery rightalign|thymol blue.jpg~Chemical structure]]] | ||
| − | == | + | == Risks == |
| − | Soluble in ethanol, dilute alkali. Insoluble in water. pH: below 1.5 (red); 2.8-8.0 (yellow); 9.6 and above (blue). | + | * Contact may cause irritation. |
| + | * Thymol Blue: [https://www.fishersci.com/store/msds?partNumber=T4165&productDescription=THYMOL+BLUE+CERTIFIED+ACS+5G&vendorId=VN00033897&countryCode=US&language=en SDS] | ||
| + | |||
| + | == Physical and Chemical Properties === | ||
| + | |||
| + | * Soluble in ethanol, dilute alkali. Insoluble in water. | ||
| + | * pH: below 1.5 (red); 2.8-8.0 (yellow); 9.6 and above (blue). | ||
{| class="wikitable" | {| class="wikitable" | ||
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|- | |- | ||
! scope="row"| Melting Point | ! scope="row"| Melting Point | ||
| − | | 223 (dec) | + | | 223 C (dec) |
|- | |- | ||
! scope="row"| Molecular Weight | ! scope="row"| Molecular Weight | ||
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|} | |} | ||
| − | == | + | ==Resources and Citations== |
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| − | * | + | * G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p. 184 |
| − | * | + | * Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993 |
* ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 9541 | * ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 9541 | ||
Latest revision as of 12:28, 8 June 2022
Description
Brownish crystals. Thymol blue dissolves in alkaline solution to form a deep blue color. It acts as an acid base indicator for pH range 1.2-2.8 changing from red to yellow and for pH range 8.0-9.6 changing from red to blue.
Synonyms and Related Terms
Thymolblau (Deut.); thymolsulfonphthalein
Risks
- Contact may cause irritation.
- Thymol Blue: SDS
Physical and Chemical Properties =
- Soluble in ethanol, dilute alkali. Insoluble in water.
- pH: below 1.5 (red); 2.8-8.0 (yellow); 9.6 and above (blue).
| Composition | C27H30O4 |
|---|---|
| CAS | 76-61-9 |
| Melting Point | 223 C (dec) |
| Molecular Weight | mol. wt. = 466.60 |
Resources and Citations
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 184
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 9541