Introduction:
β-bromo-phenylethane is an important intermediate for the synthesis of highly efficient bromo-based flame retardants polybromo-styrene, and is also commonly used in the preparation of organic synthesis intermediates. For example, β-bromophenethane can be used to prepare the intermediate 4-(4-phenylbutoxy) benzoic acid of Prelenast. As an anti-asthma drug, prelunast was first developed by the Japanese company Ono and launched in Japan in 1995, and in 1999, it was found to treat allergic rhinitis. Prelenast is a leukotriene C4/D4 receptor antagonist (lTRAs) with extremely low toxicity. It can selectively inhibit the activity of leukotriene multiskin in airway smooth muscle, and has almost no effect on arachidonic acid metabolic enzymes. At the same time, it has no antagonistic effect on acetylcholine and 5-hydroxytryptamine, and significantly inhibits lTC4, lTD4 and lTE4.
Application:
β-bromophenethane in medicine, can be used in the synthesis of insecticides and blood pressure agents; In industry, it can be used as a new flocculant and dispersant, an excellent fiber dyeing modifier, an antistatic agent for plastics, fibers and paper, a viscosity regulator in the production of photosensitive materials, an ion exchange resin and exchange film, and a gloss agent for electroplating.
Production method:
It is prepared by the reaction of phenyl ethanol with hydrogen bromide. The phenylethanol is heated to 110℃, and the hydrogen bromide is slowly introduced and the reflux reaction is carried out. At the end of the reaction, cool, wash with water, 10% sodium carbonate solution, and water in turn. After drying with anhydrous potassium carbonate, vacuum fractionation was performed and 97-99℃ (2.0kPa) fractions were collected. The yield was over 90%.
| Melting Point | -56 °C
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| Boiling Point | 220-221 °C
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| Density | 1.355 g/mL at 25 °C
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| Refractive Index | n 20/D 1.556
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| Flashing Point | 193 °F
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| Storage Condition | 2-8°C
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| Solubility | 0.039 g/L |
| Water Solubility | INSOLUBLE
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| Sensibility | It's stable. Incompatible with strong oxidants.
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Our advantages:
1) Timely communication, reply within 12 hours.You can leave any messages on our whatsapp or send email to us.
2)Selecting raw materials strictly,our products are the highest purity.
3)Reasonable and competitive price.
4) Free sample for your evaluation.Customers only need to undertake the shipping fee for delivery the samples to your destionation.
5)OEM/ODM Available.Trial order is available for testing after samples.
6) Packaging can be customized according to each buyers' special request.
We guarantee that your package will pass 100% through the Mexico US, UK, Australia, Netherlands, Canada, France, Germany, Spain, Belgium, Sweden, Poland, Russian, Ukraine, Kazakhstan, Czech Republic, Slovakia, Portugal.
We have freight forwarders in these countries, and our customs clearance company will clear your parcels without any customs issues, sometimes even 1000 kg. Door to door service. Make sure you receive 100% of the goods. Let you have a good experience of our strong freight capacity.
Company Introduction
hebei yanxi chemical co., LTD who registered capital of 10 million yuan, nearly to $2 million, we have a pharmaceutical raw materials factory production of pharmaceutical raw materials, and a reagent r&d center, and we do research and development production of reagent tens of thousands of species. our aim is quality strives for the survival. Seek development by credit reputation. Our products have big price advantage in Europe South America and so on .and Our company also has the advantage of high quality in Africa. in the past two years our products has reached more than 30 countries in the world, Europe. South America. North America, southeast Asia, Africa, etc. We welcome all over the world with the best quality and lowest price friend common cooperation and common development!
After Sales Service
1) Best quality in your requirement
2)Competitive price in china market
3)Mature technical support
4)Professional logistic support
5 )Full experience of large numberscontainers loading in chinese sea port
6 )Fast shipment by reputed shipping line
7) Packing with pallet as buyer's special request
8) Best service after shipment.
9) Cargoes together with container after-sales service available
10) Full experience in export
11)Raw materials from chinese origin
FAQ
What is the way you ship?
Express: FedEx, UPS, EMS, DHL, USPS, TNT, DPD, Aramex etc
Our way of shipping the products is universal and secure.
The company name and other contents related to pharmacy are not written on the package slips.
The way of packing is regularly changed for a secure delivery.
The packages are small in order to avoid unwelcomed questions . If the order is big, then it will be divided into two or more packages
Can the packages be trackable?
YES, we provide tracking number and you can track on internet.
Where do you ship to?
Worldwide.
Do you offer domestic shipping/remail shipping?
Yes we can ship to USA/UK/Canada/Australia/Germany etc warehouse first then to you.
Do you ensure your packing , what about customs, what happens if the package is retained?
We concern a lot about our safety system, we pack the orders as secure as possible. If a package is seized at customs, reships of seized orders will be done provided you have a copy of the letter to show us. If you receive a seizure letter, please contact us immediately with a scanned copy of the seizure letter, and also a new address to have your order reshipped to.
Which payment options are available?
Bitcoin
Western Union
Bank wire
MoneyGram
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