Difference between revisions of "Bromcresol green"
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== Description == | == Description == | ||
| − | A reddish brown powder used as an acid-base indicator dye. In solution bromcresol green gives a yellow color below pH 3.8 and blue color above pH 5.4. It is used in the [ | + | A reddish brown powder used as an acid-base indicator dye. In solution bromcresol green gives a yellow color below pH 3.8 and blue color above pH 5.4. It is used in the [[Archivist's Pen]] pH sensitive marker and in [[A-D strips|A-D indicator strips]]. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
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[[[SliderGallery rightalign|bromocresol green.jpg~Chemical structure]]] | [[[SliderGallery rightalign|bromocresol green.jpg~Chemical structure]]] | ||
| − | == | + | == Risks == |
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| + | * Ingestion, inhalation and contact may cause irritation. | ||
| + | * ThermoFisher: [https://www.fishersci.com/store/msds?partNumber=B3835&productDescription=BROMOCRESOL+GREEN+ACS+5G&vendorId=VN00033897&countryCode=US&language=en SDS] | ||
| + | |||
| + | ==Physical and Chemical Properties== | ||
Soluble in ethanol, ether, ethyl acetate, benzene. Slightly soluble in water. | Soluble in ethanol, ether, ethyl acetate, benzene. Slightly soluble in water. | ||
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! scope="row"| Melting Point | ! scope="row"| Melting Point | ||
| − | | 218-219 | + | | 218-219 C |
|- | |- | ||
! 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 | * G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 | ||
Latest revision as of 11:32, 10 May 2022
Description
A reddish brown powder used as an acid-base indicator dye. In solution bromcresol green gives a yellow color below pH 3.8 and blue color above pH 5.4. It is used in the Archivist's Pen pH sensitive marker and in A-D indicator strips.
Synonyms and Related Terms
Bromkresolgrün (Deut.); bromocresol green; 3,3',5,5'-tetrabromophenol-meta-cresolsulfonphthalein; 4,4'-(3H-2, 1-benzoxathiol-3-ylidene) bis [2,6-dibromo-3 methylphenol]S,S-dioxide
Risks
- Ingestion, inhalation and contact may cause irritation.
- ThermoFisher: SDS
Physical and Chemical Properties
Soluble in ethanol, ether, ethyl acetate, benzene. Slightly soluble in water.
| Composition | C21H14Br4O5S |
|---|---|
| CAS | 76-60-8 |
| Melting Point | 218-219 C |
| Molecular Weight | mol. wt. = 698.02 |
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 1407
- Sigma Dyes, Stains and Natural Pigments, Infrared Library, Nicolet, 1991-1995 Comment: OMNIC: formula= C21H14Br4O5S, CAS= 76-60-8