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| 1,4-Dimethoxybenzene Basic information |
| 1,4-Dimethoxybenzene Chemical Properties |
| Melting point | 54-56 °C(lit.) | | Boiling point | 213 °C(lit.) | | density | 1.053 g/mL at 25 °C(lit.) | | vapor density | 4.8 (vs air) | | vapor pressure | <1 mm Hg ( 20 °C) | | refractive index | 1.5231 (estimate) | | FEMA | 2386 | P-DIMETHOXYBENZENE | | Fp | 98 °C | | storage temp. | Sealed in dry,Room Temperature | | solubility | dioxane: 0.1 g/mL, clear | | form | Crystalline Powder, Crystals, or Flakes | | color | White | | Specific Gravity | 1.053 | | PH | 7 (H2O, 20℃)(saturated solution) | | explosive limit | 1.2-5.6%(V) | | Water Solubility | 0.8 g/l (20 ºC) | | Sensitive | Light Sensitive | | JECFA Number | 1250 | | BRN | 774605 | | Stability: | Stable. Combustible. Incompatible with strong oxidizing agents. | | LogP | 2.08 at 20℃ | | CAS DataBase Reference | 150-78-7(CAS DataBase Reference) | | NIST Chemistry Reference | Benzene, 1,4-dimethoxy-(150-78-7) | | EPA Substance Registry System | p-Dimethoxybenzene (150-78-7) |
| 1,4-Dimethoxybenzene Usage And Synthesis |
| Chemical Properties | white crystals or powder | | Chemical Properties | Hydroquinone Dimethyl Ether occurs in hyacinth oil and has also been identified
in tea. It is a white, crystalline solid (mp 57–58°C) with an intensely sweet,
somewhat herbal, nut-like odor.
Hydroquinone dimethyl ether is prepared by etherification of hydroquinone and
is used in soap perfumes. | | Chemical Properties | p-Dimethoxybenzene has a bitter taste. | | Occurrence | Reported found in hyacinth (Hyacinthus orientalis L.) essential oil, Rhodophyllus icterius, papaya, peppermint
oil, green tea, cherimoya and cooked shrimp | | Uses | 1,4-Dimethoxybenzene is used as Pharmaceutical Intermediate. It is used in some paints and as a diazo dye. It is also used in perfumes and flavors in order to its floral odor. In addition, it is used on greasy skin, and with sulfur to treat acne, or as a dandruff treatment. | | Uses | Weathering agent in paints and plastics, fixative
in perfumes, dyes, resin intermediate, cosmetics,
especially suntan preparations, flavoring. | | Preparation | By methylation of hydroquinone using dimethyl sulfate and alkali. | | Synthesis Reference(s) | Journal of the American Chemical Society, 83, p. 1251, 1961 DOI: 10.1021/ja01466a056 | | General Description | Colorless crystals. | | Air & Water Reactions | Slightly water soluble . | | Reactivity Profile | 1,4-Dimethoxybenzene is an ether. Ethers may react violently with strong oxidizing agents. In other reactions, which typically involve the breaking of the carbon-oxygen bond, ethers are relatively inert. | | Flammability and Explosibility | Notclassified | | Purification Methods | Steam distil 1,4-dimethoxybenzene, then crystallise it from hexane or *benzene, and from MeOH or EtOH, but these are wasteful due to high solubilities. Dry it under vacuum. It also sublimes under vacuum. [Beilstein 6 IV 5718.] |
| 1,4-Dimethoxybenzene Preparation Products And Raw materials |
| Raw materials | Dimethyl sulfate-->Hydroquinone-->Metaclazepam | | Preparation Products | 2,3-DICHLORO-5,8-DIHYDROXY-1,4-NAPHTHOQUINONE-->cis-Anethol-->N-Isopropylacrylamide-->Acemetacin-->2,5-Dimethoxyaniline-->2,5-Dichlorobenzo-1,4-quinone-->1-(2,5-Dimethoxyphenyl)-2-oximino-1-propanone-->Demosan-->(2,5-Dimethoxyphenyl)acetic acid-->Astemizole-->2,5-DIMETHOXYPROPIOPHENONE-->1-(2 5-DIMETHOXYPHENYL)-2-AMINOPROPANE&-->METHYL 2-AMINO-2-(4-HYDROXYPHENYL)ACETATE-->1,4-DIMETHOXY-2-NITROBENZENE-->2,5-DIHYDROXYBENZONITRILE-->2,5-dimethoxyterephthalohydrazide-->2-tert-butyl-1,4-dimethoxybenzene |
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