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 [ | + | White to yellowish crystals that are used to detect the presence of mechanical wood pulp in paper. Phloroglucinol test solution contains [[hydrochloric%20acid|hydrochloric acid]] and [[ethyl%20alcohol|ethanol]]. A drop placed on the paper will turn red when [[lignin|lignin]] is present (detection limit is about 5%). [[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 == | ||
phloroglucinol dihydrate; 1,3,5-benzenetriol; 1,3,5-trihydroxybenzene; phloroglucine; phloroglucin stain | phloroglucinol dihydrate; 1,3,5-benzenetriol; 1,3,5-trihydroxybenzene; phloroglucine; phloroglucin stain | ||
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[[[SliderGallery rightalign|phloroglucinol.jpg~Chemical structure]]] | [[[SliderGallery rightalign|phloroglucinol.jpg~Chemical structure]]] | ||
| − | == | + | == Risks == |
| − | + | * Decomposes in light; store in dark container. | |
| + | * Inhalation and skin contact may cause irritation. | ||
| + | * ThermoFisher: [https://www.fishersci.com/store/msds?partNumber=AC241760250&productDescription=PHLOROGLUCINOL%2C+99%2B%25%2C+AN+25GR&vendorId=VN00032119&countryCode=US&language=en SDS] | ||
| + | == Physical and Chemical Properties == | ||
| − | Detection limit is about 5% when used as a stain to detect mechanical wood pulp. | + | * Soluble in ethanol, pyridine, ether. Slightly soluble in water. |
| + | * Detection limit is about 5% when used as a stain to detect mechanical wood pulp. | ||
{| class="wikitable" | {| class="wikitable" | ||
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! scope="row"| Melting Point | ! scope="row"| Melting Point | ||
| − | | 212-218 | + | | 212-218 C |
|- | |- | ||
! scope="row"| Molecular Weight | ! scope="row"| Molecular Weight | ||
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|} | |} | ||
| − | == | + | ==Resources and Citations== |
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| − | + | * AIC Book and Paper Catalog, 10. Spot Tests, page 12. | |
* Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993 | * Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993 | ||
Latest revision as of 08:06, 22 October 2022
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
Risks
- Decomposes in light; store in dark container.
- Inhalation and skin contact may cause irritation.
- ThermoFisher: SDS
Physical and Chemical 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 C |
| Molecular Weight | mol. wt.=126.11 |
Resources and Citations
- AIC Book and Paper Catalog, 10. Spot Tests, page 12.
- 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