1,3-Dichloro-5,5-dimethylhydantoin

Details:

preparation
Step 1:5, synthesis of 5-dimethylheine. 1) 46ml(0.5mol) acetone cyanohydrin and 30ml water were added into the reaction bottle, heated and stirred, 80g(0.7mol) ammonium carbide was added in stages within 20min, and then the temperature was controlled in stages for 2h reaction. After the reaction was completed, the reaction liquid was poured into the beek while hot, cooled and filtered to obtain 44.8g of white solid product. The yield was 70% at m.p.180.4182.8℃, the filtrate was concentrated to obtain yellow solid, recrystallization, filtration and drying to obtain light yellow solid 9.8g with 15% yield, and the total yield was 85% at m.p.180182℃. Or the filtrate obtained above is not concentrated and directly used as the solution of the next reaction, the operation steps are the same as above, so the reaction cycle is repeated for five times, and the single yield is 82%95%.
Step 2:5, Product purification of 5-dimethylheine. The beaker containing 20ml distilled water was placed in a water bath at a constant temperature at 80℃, the crude product was added to nearly saturation (about 22.07g), and then recrystallized by ice bath and dried to obtain 20.14g of colorless needle or white powder product. The recovery rate was 91.3%. The filtrate can be recycled.
Step 3: Synthesis of 1, 3-dichloro-5, 5-dimethylhydneine 8.25g(0.206mol) sodium hydroxide and 5ml water were added into a 250ml three-neck bottle equipped with mechanical stirring, reflux condensing tube and drip funnel, and dissolved by stirring. The mixture was cooled to 010℃, and 2.24l(about 0.10mol) of chlorine gas was slowly introduced. Add 12.8g(0.10mol) of 5, 5-dimethylhydnein solid, stir for 5min, and then slowly introduce 2.46l(about 0.11mol) of chlorine gas to maintain, and then continue to stir for 20min, cool and filter, wash the crude product three times with 100ml water, and drain. Under 50℃ vacuum drying light yellow solid or white solid 18.0g, the yield of 91%.

About:
Dichlorodimethylhydantoin, also known as 1, 3-dichloro5, 5-dimethylhydantoin, 1, 3-dichloro5, 5-dimethylhydantoin, DCDMH, etc., English name 1, 3-dichloro-5, 5-dimethylhydantoin, 1, 3-dichloro-5, 5-dimethyl-2, 4-Imidazolidinedione, Dactin, Halane, etc., white tetrahedral prism crystalline powder (industrial products have various specifications such as granular and flake), with slight chlorine pungent odor, easy to absorb moisture, and partial hydrolysis after moisture absorption. Soluble in chloroform, dichloromethane, carbon tetrachloride, dichloroethylene, symmetrical tetrachloroethane, benzene and other organic solvents and concentrated sulfuric acid. It turns brown when heated to boiling point and burns rapidly.

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!

Our advantages

1) Timely communication, reply within 12 hours.You can leave any messages on our whats app 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.

After Sales Service

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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

1.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

2.Can the packages be trackable

YES, we provide tracking number and you can track on internet.

3.Where do you ship to

Worldwide.

4.Do you offer domestic shipping/remail shipping

Yes we can ship to USA/UK/Canada/Australia/Germany etc warehouse first then to you.

5.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.

6.Which payment options are available

Bitcoin,,Bank wire,MoneyGram