solubility of caffeine in ch2cl2

  • Dichloromethane | CH2Cl2 - PubChem

    Dichloromethane is a member of the class of chloromethanes that is methane in which two of the hydrogens have been replaced by chlorine.A dense, non-flammible colourless liquid at room temperature (b.p. 40℃, d = 1.33) which is immiscible with water, it is widely used as a solvent, a paint stripper, and for the removal of caffeine from coffee and tea.

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  • Why is caffeine more soluble in Dichloromethane …

    Hi I've been looking into decaffeination and using different solvents to extract caffeine, but I just can't get my head around this idea. It have been shown before that Dichloromethane is one of the solvent to extract caffeine, but Dichloromethane is less polar than other solvents like water, ethyl acetate and acetone, so why is caffeine most soluble in Dichloromethane?

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  • IUPAC-NIST Solubilities Database

    The solubility of dichloromethane (1) in water (2) has been studied by at least 32 groups of workers. Most of the data reported have been considered for inclusion in the smoothing equation with the following exclusions. The experimental data of Salkowski (ref. 1) are markedly lower than the other results and are therefore rejected. The solubility data of Booth and Everson (ref. 2), Alexandrova

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  • Dichloromethane-13C | CH2Cl2 - PubChem

    Dichloromethane-13C | CH2Cl2 | CID 12222467 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities ...

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  • organic chemistry - Dichloromethane solubility in …

    $\begingroup$ "it is not because it can't form hydrogen bonds" - Just bear in mind that solubility isn't a black and white thing. Dichloromethane is pretty insoluble in water (as opposed to something like ethanol) because it doesn't H-bond with water, but that doesn't mean it is entirely insoluble. $\endgroup$ – orthocresol ♦ Sep 30 '15 at ...

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  • Dichloromethane - Wikipedia

    Dichloromethane (DCM or methylene chloride) is an organochloride compound with the formula C H 2 Cl 2. This colorless, volatile liquid with a moderately sweet aroma is widely used as a solvent . Although it is not miscible with water, it is polar , and miscible with many organic solvents .

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  • Dichloromethane | Podcast | Chemistry World

    DCM was the solvent of choice for caffeine extraction in the 1970s, however when it was found to be carcinogenic it was soon replaced by other non-toxic solvents. DCM is not only carcinogenic, but if it’s inhaled, it can also affect the central nervous system. On one occasion I was ‘extracted’ from the lab by my supervisor at the end of a long day, as my blushing cheeks and dazed ...

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  • Dichloromethane | Podcast | Chemistry World

    DCM was the solvent of choice for caffeine extraction in the 1970s, however when it was found to be carcinogenic it was soon replaced by other non-toxic solvents. DCM is not only carcinogenic, but if it’s inhaled, it can also affect the central nervous system. On one occasion I was ‘extracted’ from the lab by my supervisor at the end of a long day, as my blushing cheeks and dazed ...

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  • EXTRACTION OF CAFFEINE FROM TEA

    The solubility of caffeine in water at 20°C is 2.2 g per 100 mL, so there is no problem in keeping it in water solution while you filter off the spent tea leaves and calcium salts. Caffeine is far more soluble in dichloromethane: 10.2 g per 100 mL at 20% So this extraction takes advantage of distribution coefficient (k) of 4.6. To Conserve dichloromethane and time, we will settle for two 15 ...

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  • Does caffeine dissolve in acetone - Answers

    Caffeine is soluble in water - but not HIGHLY soluble. You can dissolve a lot more caffeine in the same volume of water compared to what will dissolve in an equal volume of acetone. It dissolves ...

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  • Chapter 5.7 Dichloromethane - WHO/Europe

    sensitive substances such as edible fats, caffeine, cocoa, spices and hops. DCM is also used in consumer products such as paint strippers, with a DCM content of 70–75%, and in hair-spray aerosols containing DCM as a solvent and vapour pressure modifier up to 35% w/w. Other products, such as household cleaning products, room deodorants, and lubricating and degreasing products in aerosol …

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  • Is CH2Cl2 Polar or Nonpolar? Dichloromethane - …

    02/12/2015· This video discusses if CH2Cl2 is polar or nonpolar. CH2Cl2 is known as dichloromethane. It has a dipole moment of 1.60D. This video also provides the lewis ...

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  • Why is benzoic acid soluble in dichloromethane? …

    First, that’s not normally considered to be a “reaction”. As for why benzoic acid is soluble in low-polarity solvents like dichloromethane, a lot of it has to do with the formation of dimers, in which the hydrogen bonding ability of the COOH group...

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  • ISOLATION OF CAFFEINE FROM TEA EXPERIMENTAL …

    solubility of caffeine at room temperature is 2.2g/100mL in water at 25 oC (6.7g/100mL at 100 oC) and 18g/100mL in chloroform. Caffeine crystallises readily and it can also be sublimed. In this experiment the caffeine is first extracted from tea leaves using hot water. This only takes a few minutes (about 10 minutes), and there is no advantage to leaving it for 20 minutes. This aqueous ...

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  • Why is caffeine highly soluble in dichloromethane - …

    In water caffeine dissolves for the most part via formation of hydrogen bonds where atoms with free electron pairs are involved, and the solubility of caffeine in water in 2.2mg/mL at 25 C, 180 mg ...

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