74094-60-3

Usage

Chemical Properties

Clear, colorless liquid; nutty, fatty aroma.

InChI:InChI=1/C8H16O2/c1-3-4-5-8-9-6-7(2)10-8/h7-8H,3-6H2,1-2H3

Upstream product

• 57-55-6 propylene glycol 
• 110-62-3 pentanal 

Relevant academic research and scientific papers

preliminary aldehyde (C 2-C 10) propylene glycol acetal synthetic method (by machine translation)

The invention discloses a synthetic method of low-grade aldehyde (C2-C10) propylene glycol acetal. A target object is prepared from low-grade aldehyde (C2-C10), 1, 2-propylene glycol, anhydrous calcium chloride and p-toluenesulfonic acid which are reacted in the method. By adopting the method disclosed by the invention, the reaction is free from byproducts and pollution, the product purity and the product recovery rate are high, the cost is low, the efficiency is high and the fragrance is good. Through simple stirring reaction, the content of the acetal can reach condensation over 98%, and the method is applicable to mixing various high-grade essences and has a considerable effect of increasing the stability and temperature resistance of an essence finished-product.

Identification of 1,3-dioxanes and 1,3-dioxolanes as malodorous compounds at trace levels in river water, groundwater, and tap water

A study of organic compounds imparting odor problems in river waters and groundwaters has been conducted. The Tordera aquifer located in Barcelona and Girona (NE Spain) is the water supply reserve for many seasonally crowded villages on the coast. Closed loop stripping analysis (CLSA) and flavor profile analysis (FPA) have been employed as analytical tools to identify the compounds responsible for the odor complaints. The feasibility of purge-and- trap (P and T) has also been evaluated. The 2-alkyl-5,5-dimethyl-1,3-dioxanes and 2-alkyl-4-methyl-1,3-dioxolanes were the most significant compounds identified in river water and groundwater with a threshold odor of 10 ng/L for 2-ethyl-5,5-dimethyl-1,3-dioxane (2EDD), the most malodorous compound. The analyses were carried out by HRGC/MS, and the synthesized 1,3-dioxanes and dioxolanes were characterized by CI-MS and EI-MS/MS techniques. A company, currently manufacturing saturated and unsaturated polyester resins, located in the upper course of the river, produced these compounds as byproducts during the synthesis of resins. The pollution by dioxanes and dioxolanes affected all the aquifer and slowly diminished to the ppt levels when the company was forced to correctly treat their wastewaters. Additional examples of the presence of dioxanes and dioxolanes in wastewaters of other resin plants and also tap water of Barcelona are shown. A study of organic compounds imparting odor problems in river waters and groundwaters has been conducted. The Tordera aquifer located in Barcelona and Girona (NE Spain) is the water supply reserve for many seasonally crowded villages on the coast. Closed loop stripping analysis (CLSA) and flavor profile analysis (FPA) have been employed as analytical tools to identify the compounds responsible for the odor complaints. The feasibility of purge-and-trap (P&T) has also been evaluated. The 2-alkyl-5,5-dimethyl-1,3-dioxanes and 2-alkyl-4-methyl-1,3-dioxolanes were the most significant compounds identified in river water and groundwater with a threshold odor of 10 ng/L for 2-ethyl-5,5-dimethyl-1,3-dioxane (2EDD), the most malodorous compound. The analyses were carried out by HRGC/MS, and the synthesized 1,3-dioxanes and dioxolanes were characterized by CI-MS and EI-MS/MS techniques. A company, currently manufacturing saturated and unsaturated polyester resins, located in the upper course of the river, produced these compounds as byproducts during the synthesis of resins. The pollution by dioxanes and dioxolanes affected all the aquifer and slowly diminished to the ppt levels when the company was forced to correctly treat their wastewaters. Additional examples of the presence of dioxanes and dioxolanes in wastewaters of other resin plants and also tap water of Barcelona are shown.

Acetals by AlFe-pillared montmorillonite catalysis

AlFe-pillared montmorillonite is an efficient catalyst for acetals preparation in CH2Cl2 at room temperature.

Acetals and Ethers. 11. Solubility of Alkyl-Substituted 1,3-Dioxolanes and 1,3-Dioxanes in Water

2-Alkyl-1,3-dioxolanes, 2-alkyl-4-methyl-1,3-dioxolanes, and 2-alkyl-1,3-dioxanes (alkyl: n-C3H7, ...,n-C6H13) were synthesized and their solubilities in E10-4 M aqueous sodium bicarbonate solution at 293.2 K determined.The standard free energies for transfer from aqueous solution to pure liquid phase, ΔGto, were calculated from the solubility data and the contributions of given fragments of molecules to the free energy estimated.The fve-membered 1,3-dioxolane and six-membered 1,3-dioxane rings given fragments of molecules to the free energy contribution ΔGto, related to the cyclic fragments of the molecules, are +2.84 +/- 0.20 and +2.26 +/- 0.36 kJ mol-1, respectively.Their hydrophilicity is, however, much weaker than hat of the hydroxy group in normal alcohols.The 1,3-dioxolane ring bearing a methyl group at the C-4 atom has a markedly weaker hydrophilic character.