2,4,8,10-tetraoxaspiro (5.5) undecane

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Structural formula
Structural formula of 2,4,8,10-tetraoxaspiro [5.5] undecane
General
Surname 2,4,8,10-tetraoxaspiro [5.5] undecane
other names
  • 5,5'-spirobi-1,3-dioxane
  • 5,5'-spirobi- m dioxan
  • Dimethylene pentaerythritol
  • TOSU
Molecular formula C 7 H 12 O 4
External identifiers / databases
CAS number 126-54-5
EC number 204-792-0
ECHA InfoCard 100.004.357
PubChem 78951
Wikidata Q209192
properties
Molar mass 160.17 g mol −1
Physical state

firmly

Melting point

48.3 ° C

boiling point

147 ° C

solubility

very good in water and ethanol

safety instructions
GHS hazard labeling
no classification available
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:

Scheme of the formation of TOSU

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

  1. ↑ 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.
  2. ↑ a b D. R. Lide: Handbook of Chemistry and Physics. 87th Edition, pp. 3-480, CRC Press, 2006, ISBN 978-0-8493-0487-3 .
  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.
  4. ↑ 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.@1@ 2Template: Toter Link / www.umwelt.nrw.de
  5. ↑ Gelsenwasser : Measured values ​​TOSU - TOSU value in drinking water has dropped significantly ( Memento from March 8, 2010 in the Internet Archive ).

Web links