Dimethyl sulfite
Structural formula | |||||||||||||||||||
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General | |||||||||||||||||||
Surname | Dimethyl sulfite | ||||||||||||||||||
other names |
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Molecular formula | C 2 H 6 O 3 S | ||||||||||||||||||
Brief description |
colorless liquid |
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External identifiers / databases | |||||||||||||||||||
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properties | |||||||||||||||||||
Molar mass | 110.13 g · mol -1 | ||||||||||||||||||
Physical state |
liquid |
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density |
1.21 g cm −3 (20 ° C) |
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boiling point |
126-127 ° C |
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solubility |
Decomposes in water |
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Refractive index |
1.4083 (20 ° C, 589 nm) |
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safety instructions | |||||||||||||||||||
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Thermodynamic properties | |||||||||||||||||||
ΔH f 0 |
−523.6 kJ / mol |
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C |
Dimethyl sulfite is the Di -methyl ester of the sulfur dioxide . Dimethyl sulfite is the simplest organic sulfite and is used as an antioxidant in polymers.
Extraction and presentation
Although dimethyl sulfite is formally derived from sulfurous acid, it is produced by the reaction of thionyl chloride and methanol .
Individual evidence
- ↑ a b c d e f g Data sheet dimethyl sulfite (PDF) from Merck , accessed on March 25, 2011.
- ↑ David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Standard Thermodynamic Properties of Chemical Substances, pp. 5-23.