Difference between revisions of "Phloroglucinol"
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== Description == | == Description == | ||
| − | White to yellowish crystals that are used to detect the presence of mechanical wood pulp in paper. Phloroglucinol test solution contains [http://cameo.mfa.org/materials/fullrecord.asp?name=hydrochloric | + | White to yellowish crystals that are used to detect the presence of mechanical wood pulp in paper. Phloroglucinol test solution contains [http://cameo.mfa.org/materials/fullrecord.asp?name=hydrochloric%20acid hydrochloric acid] and [http://cameo.mfa.org/materials/fullrecord.asp?name=ethyl%20alcohol ethanol]. A drop placed on the paper will turn red when [http://cameo.mfa.org/materials/fullrecord.asp?name=lignin lignin] is present (detection limit is about 5%). [http://cameo.mfa.org/materials/fullrecord.asp?name=Iron Iron] will react with phloroglucinol giving a purple product. Once the two-part solution is mixed, it has a shelf life of 2-3 months (TAPPI T401). |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
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== Authority == | == Authority == | ||
| − | * | + | * Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993 |
| − | * | + | * Matt Roberts, Don Etherington, ''Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology'', U.S. Government Printing Office, Washington DC, 1982 |
| − | * | + | * Book and Paper Group, ''Paper Conservation Catalog'', AIC, 1984, 1989 |
* ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 7482 | * ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 7482 | ||
Revision as of 07:30, 24 July 2013
Description
White to yellowish crystals that are used to detect the presence of mechanical wood pulp in paper. Phloroglucinol test solution contains hydrochloric acid and ethanol. A drop placed on the paper will turn red when lignin is present (detection limit is about 5%). Iron will react with phloroglucinol giving a purple product. Once the two-part solution is mixed, it has a shelf life of 2-3 months (TAPPI T401).
Synonyms and Related Terms
phloroglucinol dihydrate; 1,3,5-benzenetriol; 1,3,5-trihydroxybenzene; phloroglucine; phloroglucin stain
Other Properties
Soluble in ethanol, pyridine, ether. Slightly soluble in water.
Detection limit is about 5% when used as a stain to detect mechanical wood pulp.
| Composition | C6H3(OH)3 |
|---|---|
| CAS | 108-73-6 |
| Melting Point | 212-218 |
| Molecular Weight | mol. wt.=126.11 |
Hazards and Safety
Decomposes in light; store in dark container.
Inhalation and skin contact may cause irritation.
Mallinckrodt Baker: MSDS
Additional Information
AIC Book and Paper Catalog, 10. Spot Tests, page 12.
Authority
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
- Book and Paper Group, Paper Conservation Catalog, AIC, 1984, 1989
- The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 7482