2,4,8,10-tetraoxaspiro (5.5) undecane
Structural formula | ||||||||||||||||
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General | ||||||||||||||||
Surname | 2,4,8,10-tetraoxaspiro [5.5] undecane | |||||||||||||||
other names |
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Molecular formula | C 7 H 12 O 4 | |||||||||||||||
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properties | ||||||||||||||||
Molar mass | 160.17 g mol −1 | |||||||||||||||
Physical state |
firmly |
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Melting point |
48.3 ° C |
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boiling point |
147 ° C |
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solubility |
very good in water and ethanol |
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safety instructions | ||||||||||||||||
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
2,4,8,10-Tetraoxaspiro [5.5] undecane ( TOSU ) is a chemical compound , a derivative of 1,3-dioxane and a spiro compound .
Emergence
TOSU is an acetal made from formaldehyde and pentaerythritol and is formed as a by-product in the manufacture of the latter:
Physical Properties
The flash point is 108 ° C, the octanol-water partition coefficient (log K OW ) −0.58.
Toxicology and the Environment
Based on current knowledge, the acute oral toxicity of TOSU is classified as low. There are almost no human toxicological tests.
In the period from April to July 2008, TOSU was detected in the drinking water of waterworks on the Ruhr in concentrations between 0.4 and 3.6 micrograms per liter. The substance ended up in the Ruhr with the production waste water of a company in Arnsberg . By commissioning a reverse osmosis system at the discharger, the concentration was reduced to less than 0.1 micrograms per liter.
Individual evidence
- ↑ a b Entry on 2,4,8,10-Tetraoxaspiro (5.5) undecane in the ChemIDplus database of the United States National Library of Medicine (NLM), accessed on April 18, 2018.
- ↑ a b D. R. Lide: Handbook of Chemistry and Physics. 87th Edition, pp. 3-480, CRC Press, 2006, ISBN 978-0-8493-0487-3 .
- ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
- ↑ Fritz Kalberlah: ( Page no longer available , search in web archives: Toxicological assessment of 2,4,8,10-Tetraoxaspiro (5.5) undecane (TOSU) ) (PDF; 199 kB), Freiburg, 2008.
- ↑ Gelsenwasser : Measured values TOSU - TOSU value in drinking water has dropped significantly ( Memento from March 8, 2010 in the Internet Archive ).