| Identification | More | [Name]
1,4-Dimethoxybenzene | [CAS]
150-78-7 | [Synonyms]
1,4-DIMETHOXYBENZENE
DIMETHYLHYDROQUINONE
FEMA 2386
HYDROQUINONE DIMETHYL ETHER
P-DIMETHOXYBENZENE
QUINOL DIMETHYL ETHER
1,3-Bis(hydroxymethyl)-2-benzimidazolinone
1,4-dimethoxy-benzen
2-Benzimidazolinone, 1,3-bis(hydroxymethyl)-
4-Methoxyanisole
Anisole, p-methoxy-
Benzene, p-dimethoxy-
Benzene,1,4-dimethoxy-
dimethoxybenzene
Dimethyl ether hydroquinone
Dimethylether hydrochinonu
dimethyletherhydrochinonu
dimethyletherhydroquinone
dimethyletherhydroquinone(1,4-dimethoxybenzene)
Dimethylhydroquinone ether | [EINECS(EC#)]
205-771-9 | [Molecular Formula]
C8H10O2 | [MDL Number]
MFCD00008401 | [Molecular Weight]
138.16 | [MOL File]
150-78-7.mol |
| Chemical Properties | Back Directory | [Appearance]
white crystals or powder | [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)
| [FEMA ]
2386 | [refractive index ]
1.5231 (estimate) | [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 | [Odor]
at 1.00 % in dipropylene glycol. sweet green new mown hay fennel | [PH]
7 (H2O, 20℃)(saturated solution) | [Stability:]
Stable. Combustible. Incompatible with strong oxidizing agents. | [biological source]
synthetic | [explosive limit]
1.2-5.6%(V) | [Odor Type]
green | [Water Solubility ]
0.8 g/l (20 ºC) | [Sensitive ]
Light Sensitive | [JECFA Number]
1250 | [BRN ]
774605 | [Dielectric constant]
4.5（23℃） | [LogP]
2.08 at 20℃ | [Uses]
Weathering agent in paints and plastics, fixative
in perfumes, dyes, resin intermediate, cosmetics,
especially suntan preparations, flavoring. | [CAS DataBase Reference]
150-78-7(CAS DataBase Reference) | [NIST Chemistry Reference]
Benzene, 1,4-dimethoxy-(150-78-7) | [EPA Substance Registry System]
150-78-7(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
Xi | [Risk Statements ]
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36:Wear suitable protective clothing .
S24/25:Avoid contact with skin and eyes . | [WGK Germany ]
1
| [RTECS ]
CZ6650000
| [Autoignition Temperature]
1463 °F | [TSCA ]
Yes | [HS Code ]
29093090 | [Hazardous Substances Data]
150-78-7(Hazardous Substances Data) |
| Raw materials And Preparation Products | Back Directory | [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-->METHYL 2-AMINO-2-(4-HYDROXYPHENYL)ACETATE-->1-(2 5-DIMETHOXYPHENYL)-2-AMINOPROPANE&-->2,5-DIHYDROXYBENZONITRILE-->1,4-DIMETHOXY-2-NITROBENZENE-->2,5-dimethoxyterephthalohydrazide-->2-tert-butyl-1,4-dimethoxybenzene-->2-ACETOXY-2',5'-METHOXYBENZOPHENONE-->(2,5-dimethoxyphenyl)-pyridin-2-ylmethanol |
| Hazard Information | Back Directory | [General Description]
Colorless crystals. | [Reactivity Profile]
1,4-DIMETHOXYBENZENE(150-78-7) 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. | [Air & Water Reactions]
Slightly water soluble . | [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. | [Chemical Properties]
white crystals or powder | [Occurrence]
Reported found in hyacinth (Hyacinthus orientalis L.) essential oil, Rhodophyllus icterius, papaya, peppermint
oil, green tea, cherimoya and cooked shrimp | [Definition]
ChEBI: 1,4-Dimethoxybenzene is a dimethoxybenzene. | [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 | [Flammability and Explosibility]
Notclassified | [Synthesis]
An aqueous solution of sodium hydroxide (40%,175 ml) is added dropwiseduring 3 hr at 18-22° to a well stirred mixture of hydroquinone (50 g,0.45mole)，sodium hydrosulphite (2.0 g,0.115 mole), dimethyl sulphate (110ml,146.63 g,1.16 mole) and alcohol (150 ml). Ice (1 kg) is added and the reaction mixture left overnight at room temperature. It is extracted withether (2 × 200 ml). The ether extract is washed with water,dried(anhydrous sodium sulphate) and distilled.1,4-Dimethoxy benzene isobtained as an oil. Yield 52.75 g (84.1%).It solidifies on cooling and iscrystallised from ether-petroleum ether as shining needles. M.p. 55-56°. | [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.] |
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