Difference between revisions of "Cresol red"
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== Description == | == Description == | ||
| − | A reddish-brown crystalline powder used as an [ | + | A reddish-brown crystalline powder used as an [[indicator dye|acid-base indicator]]. Cresol red changes from yellow to red from pH 7.2 - 8.8. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
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[[[SliderGallery rightalign|cresol red.jpg~Chemical structure]]] | [[[SliderGallery rightalign|cresol red.jpg~Chemical structure]]] | ||
| − | == | + | == Risks == |
| + | |||
| + | * Fisher Scientific: [https://fscimage.fishersci.com/msds/83307.htm MSDS] | ||
| + | |||
| + | ==Physical and Chemical Properties== | ||
Soluble in ethanol, water, dilute acid and dilute alkalis. | Soluble in ethanol, water, dilute acid and dilute alkalis. | ||
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! scope="row"| Melting Point | ! scope="row"| Melting Point | ||
| − | | 290(dec) | + | | 290 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 |
| − | * | + | * 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 2647 | * ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 2647 | ||
Latest revision as of 11:53, 7 July 2022
Description
A reddish-brown crystalline powder used as an acid-base indicator. Cresol red changes from yellow to red from pH 7.2 - 8.8.
Synonyms and Related Terms
o-cresol-sulfonphthalein; rosso cresolo (It.)
Risks
- Fisher Scientific: MSDS
Physical and Chemical Properties
Soluble in ethanol, water, dilute acid and dilute alkalis.
| Composition | C21H18O5S |
|---|---|
| CAS | 1733-12-6 |
| Melting Point | 290 C (dec) |
| Molecular Weight | mol. wt. = 382.42 |
Resources and Citations
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971
- 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 2647
- Sigma Dyes, Stains and Natural Pigments, Infrared Library, Nicolet, 1991-1995 Comment: OMNIC: formula= C21H18O5S, CAS= 1733-12-6