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 [http://cameo.mfa.org/materials/fullrecord.asp?name=Archivist | + | 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 [http://cameo.mfa.org/materials/fullrecord.asp?name=Archivist%27s%20Pen Archivist's Pen] pH sensitive marker and in [http://cameo.mfa.org/materials/fullrecord.asp?name=A-D%20strips A-D indicator strips]. |
== Synonyms and Related Terms == | == 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 | |
[[[SliderGallery rightalign|bromocresol green.jpg~Chemical structure]]] | [[[SliderGallery rightalign|bromocresol green.jpg~Chemical structure]]] | ||
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== Authority == | == Authority == | ||
| − | * | + | * 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 | * ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 1407 | ||
Revision as of 07:54, 24 July 2013
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
Other Properties
Soluble in ethanol, ether, ethyl acetate, benzene. Slightly soluble in water.
| Composition | C21H14Br4O5S |
|---|---|
| CAS | 76-60-8 |
| Melting Point | 218-219 |
| Molecular Weight | mol. wt. = 698.02 |
Hazards and Safety
Ingestion, inhalation and contact may cause irritation.
Mallinckrodt Baker: MSDS
Authority
- 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