634591-75-6

Basic information

• Product Name: 3,3-Bis-(2-ethyl-hexyloxymethyl)-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine
• Synonyms: 3,3-Bis-(2-ethyl-hexyloxymethyl)-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine
• CAS NO: 634591-75-6
• Molecular Formula: C₂₅H₄₄O₄S
• Molecular Weight: 440.67946
• EINECS: -0
• Mol File: 634591-75-6.mol

Chemical Properties

• Boiling Point: 495.5±25.0 °C(Predicted)
• Appearance: /
• Density: 0.993±0.06 g/cm3(Predicted)
• CAS DataBase Reference: 3,3-Bis-(2-ethyl-hexyloxymethyl)-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine(CAS DataBase Reference)
• NIST Chemistry Reference: 3,3-Bis-(2-ethyl-hexyloxymethyl)-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine(634591-75-6)
• EPA Substance Registry System: 3,3-Bis-(2-ethyl-hexyloxymethyl)-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine(634591-75-6)

Safety Data

• Hazardous Substances Data: 634591-75-6(Hazardous Substances Data)

Usage

Uses

Used in Plastics Industry:
3,3-Bis-(2-ethyl-hexyloxymethyl)-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine is used as a plasticizer for improving the flexibility and durability of plastics. Its addition to plastics results in enhanced performance and longevity of the final products.
Used in PVC Products:
In the production of PVC products, 3,3-Bis-(2-ethyl-hexyloxymethyl)-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine is used as a plasticizer to ensure the desired properties of the end products. It is particularly useful in the manufacturing of cables, flooring, and automotive parts, where high-temperature applications and durability are required.
Used in High-Temperature Applications:
Due to its excellent heat stability and low volatility, 3,3-Bis-(2-ethyl-hexyloxymethyl)-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine is used as a plasticizer in applications that demand resistance to high temperatures. This makes it suitable for use in industries where products are exposed to elevated temperatures during manufacturing or usage.
Used for Environmental Friendliness:
3,3-Bis-(2-ethyl-hexyloxymethyl)-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine is used as a low toxicity plasticizer, making it an environmentally friendly option for plastic manufacturers. Its eco-friendly nature contributes to the development of sustainable products and reduces the environmental impact of plastic production.

Upstream product

• 51792-34-8 2,3-dimethoxythiophene 
• 104-76-7 2-Ethylhexyl alcohol 
• 701209-98-5 3,3-bis(bromomethyl)-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine 

Downstream Products

• 700817-08-9 6,8-dibromo-3,3-bis(2-ethylhexyloxymethyl)-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine 

Relevant articles and documents

Reversible full-color generation with patterned yellow electrochromic polymers

A different light: The yellow electrochromic copolymer, propylenedioxythiophene phenylene P(ProDOT-Ph) is patterned by the micromolding in capillaries (MIMIC) process to fabricate line gratings. Under illumination by white light, colors are generated by diffraction and can be changed by applying an external voltage (see picture). The diffracted color is blue shifted by electrochemical doping, a process that is completely reversible. Copyright

Spray coatable electrochromic dioxythiophene polymers with high coloration efficiencies

Four new disubstituted propylenedioxythiophene polymers have been synthesized by Grignard metathesis on the 1-5 g scale. All polymers were found to be soluble in chloroform, methylene chloride, toluene, and tetrahydrofuran and were fully structurally characterized having GPC determined number-average molecular weights ranging from 33000 to 47000 g mol-1. Dilute polymer solutions in toluene exhibited strong red fluorescence with moderate quantum efficiencies from 0.38 to 0.50. Homogeneous thin films were formed by electropolymerization and spray casting polymer solutions onto ITO coated glass slides at thicknesses of ca. 150 nm. The films were electroactive, switching from a dark blue-purple to a transmissive sky blue upon p-doping, often with subsecond switching times, and high electrochromic contrast luminance changes (% ΔY) of 40-70%. These studies revealed that the branched derivatives, [poly(3,3-bis(2-ethylhexyl)-3,4-dihydro-2H-thieno[3,4-o] [1,4]dioxepine)] and [poly(6,8-dibromo-3,3-bis(2-ethylhexyloxymethyl)-3,4-dihydro-2H-thieno[3,4-b][1, 4]dioxepine)], gave an electrochemical response and associated color change over a much smaller voltage range in comparison to the linear chain substituted derivatives, [poly(3,3-dihexyl-3,4-dihydro-2H-thieno[3,4-o][1,4]dioxepine)] and [poly(3,3-bis(octadecyloxymethyl)-3,4-dihydro-2H-thieno[3,4-b] [1,4]dioxepine)]. Composite coloration efficiency values were found up to 1365 cm2/C; this was considerably larger than values obtained from previously studied alkylenedioxythiophene based polymers (～375 cm2/C).

Yellow electrochromic polymer materials with fine tuning electrofluorescences by adjusting steric hindrance of side chains

A series of novel conducting conjugated yellow-to-transmissive electrochromic (EC) polymers were designed and synthesized to research their structure-property relationships, achieving electrofluorescent (EF) switching with applied external potential. These bifunctional materials are based on repeat units of bi-phenyl-1,3,4-oxadiazole and thiophene derivatives with different side chains. The polymers present a similar yellow color and emit various fluorescences with applied reduction potential, and they can turn to nearly transparent and non-fluorescent with oxidization potential. The optical contrast, electrochemical, electrochromic and electrofluorescent switching properties were also characterized in detail. A device containing these polymers was also fabricated that can achieve electrochromic and electrofluorescent switching simultaneously, making these polymers promising candidates for electro-bifunctional materials.