Difference between revisions of "Pyrocatechol"
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== Description == | == Description == | ||
| − | Colorless crystals that turn brown with exposure to air. Pyrocatechol can be synthesized from [ | + | Colorless crystals that turn brown with exposure to air. Pyrocatechol can be synthesized from [[coal%20tar|coal tar]] and occurs naturally in some plant materials. Pyrocatechol is used in [[ink|inks]], photography, [[dye|dyes]], [[leather|leather]] tanning and as a light [[stabilizer|stabilizer]] and [[antioxidant|antioxidant]]. |
| − | + | [[[SliderGallery rightalign|pyrocatechol.jpg~Chemical structure]]] | |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
catechol; o-dihydroxybenzene; 1,2-benzenediol; dihydric phenol; pyrocatechin; 1,2-phendiol; Kachin | catechol; o-dihydroxybenzene; 1,2-benzenediol; dihydric phenol; pyrocatechin; 1,2-phendiol; Kachin | ||
| − | [ | + | == Risks == |
| + | |||
| + | * Toxic by ingestion, inhalation and skin absorption. | ||
| + | * Skin contact causes irritation. | ||
| + | * Combustible. Flash point = 127 C. | ||
| + | * MilliporeSigma: [https://www.emdmillipore.com/US/en/product/msds/MDA_CHEM-822261 SDS] | ||
| − | == | + | == Physical and Chemical Properties == |
Soluble in water, ethanol, ether, benzene. Dissolves and turns black in alkaline solutions. | Soluble in water, ethanol, ether, benzene. Dissolves and turns black in alkaline solutions. | ||
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! scope="row"| Melting Point | ! scope="row"| Melting Point | ||
| − | | 104 | + | | 104 C |
|- | |- | ||
! scope="row"| Density | ! scope="row"| Density | ||
| − | | 1.371 | + | | 1.371 g/ml |
|- | |- | ||
! scope="row"| Molecular Weight | ! scope="row"| Molecular Weight | ||
| Line 31: | Line 36: | ||
|- | |- | ||
! scope="row"| Boiling Point | ! scope="row"| Boiling Point | ||
| − | | 245 | + | | 245 C |
|} | |} | ||
| − | == | + | ==Resources and Citations== |
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* Michael McCann, ''Artist Beware'', Watson-Guptill Publications, New York City, 1979 | * Michael McCann, ''Artist Beware'', Watson-Guptill Publications, New York City, 1979 | ||
Latest revision as of 13:22, 23 October 2022
Description
Colorless crystals that turn brown with exposure to air. Pyrocatechol can be synthesized from Coal tar and occurs naturally in some plant materials. Pyrocatechol is used in inks, photography, dyes, Leather tanning and as a light Stabilizer and Antioxidant.
Synonyms and Related Terms
catechol; o-dihydroxybenzene; 1,2-benzenediol; dihydric phenol; pyrocatechin; 1,2-phendiol; Kachin
Risks
- Toxic by ingestion, inhalation and skin absorption.
- Skin contact causes irritation.
- Combustible. Flash point = 127 C.
- MilliporeSigma: SDS
Physical and Chemical Properties
Soluble in water, ethanol, ether, benzene. Dissolves and turns black in alkaline solutions.
| Composition | C6H4(OH)2 |
|---|---|
| CAS | 120-80-9 |
| Melting Point | 104 C |
| Density | 1.371 g/ml |
| Molecular Weight | mol. wt.=110.1 |
| Boiling Point | 245 C |
Resources and Citations
- Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979
- Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993