Best selling Tribromobenzene CAS 626-39-1
Basic Info
Model No.: CAS NO 626-39-1
Product Description
Best selling Tribromobenzene CAS 626-39-1
1,3,5-Tribromobenzene, is a reagent that can be used in the preparation of different inhibitors. It is also a substituted Bromobenzene, a general reagent in palladium-catalyzed reactions and in the synthesis of Grignard reagents.
Physicochemical properties
Boiling point 271 °C (lit.)
Flash point 271°C
Storage Room temperature.
Form Powder
Color Almost white to orange-brown
Water Soluble in hot ethanol and acetic acid. Insoluble in water.
BRN 1858917
CAS Database 626-39-1 (CAS DataBase Reference)
production method
1. The dried bromine was added dropwise to a mixture of boiling fluorobenzene and pyridine, and the hydrogen bromide generated by the reaction was absorbed by water. Then continue heating for 2h. After cooling, sodium hydroxide solution was added and extracted with ether. The extract was dried over anhydrous potassium carbonate and fractionated. The 75-90°C fraction is unreacted fluorobenzene and the 148-154°C fraction is p-bromofluorobenzene. The yield is about 49%.production method
In a 15L round bottom flask, place 100 g (1.1 mol) of aniline, 1 L of water, and 100 mL (1
2.mol) concentrated hydrochloric acid. When the aniline is dissolved, 5 L of water is added and the flask is cooled in an ice bath. Then 577 g (185 mL, 3.6 mol) of bromine was slowly fed until the solution had a significant yellow color, which took about 34 h and the reaction was complete. The tribromoaniline was eluted with Brinell. The hydrobromic acid was thoroughly washed off with water and sucked dry. In a 5 L flask equipped with a reflux condenser, wet tribromoaniline, 2.1 L of 95% ethanol, and 525 mL of benzene were placed. The flask was placed on a steam bath and heated to dissolve the tribromoaniline. 140 mL of concentrated sulfuric acid was added to the solution, and then 140 g (2.03 mol) of powdery sodium nitrite was added while maintaining the reaction under normal conditions. When the reaction is complete, the solution is heated and boiled, and this state is maintained until no more gas escapes, and then placed in a warm place for 3 hours. After the mixture was cooled, it was filtered and then a solution of 150 mL of concentrated sulfuric acid and 1.5 L of water was added to the solid. When the excess sodium nitrite has been decomposed, it is filtered, the solid is washed with water and then washed with a small amount of ethanol. Crude dry 1,3,5-tribromobenzene is red-brown, melting point 112~116°C, yield 250~260g, yield 74%~7
use
It is an important organic synthesis intermediate.
Specification
Items
Result
Appearance
Powder Content
99.0%min
Moisture
<0.1%
Heavy Metals
<0.0005%
FAQ
Q1. Are you a manufacturer
Answer: Yes, we have our own factory called [ZhiShang Industry Group ", we export by ShandongZhishangchemical Co., Ltd.
Q2. Do you have GMP or DMF
Answer: Yes, we have GMP certificate for some products, and we can provide DMF as well.
Q3. What information should I let you know if I want to get a quotation
Answer: -Quality you require, eg. Assay, Purity, or single impurity
-Quantity you need
-Standard you want, such as USP, EP, JP etc.
Q4. How to make the payment
Answer: Escrow and T/T in advance are highly recommended. We can accept Western Union, Money Gram and Paypal as well
Q5. When will you deliver the goods
Answer: For sample(less than 1kg), in about 3 working days after payment; for larger orders (more than 1kg), in about 7 working days after payment.
Q6. How will you deliver the goods
Answer: We have strong cooperation with DHL, TNT, UPS, FEDEX, EMS, China Air Post. For container products, we can do sea shipping.
You also can choose your own shipping forwarder.
Q7. When will we receive the goods
Answer: For samples, we will send by TNT/DHL/FEDEX/UPS express, usually it takes about 3-5 to reach you; for larger orders, it will take about 7 -10days at most.
Q8. What if we find your products unsatisfied
Answer: We will send you a COA (Certificate of Analysis) to you first for you to confirm the quality, but if you find our products not confirm with the COA after you receive it, please show us your test result, we will refund you once we confirm that.
Our Services
1.Cooperate with research institutions, we strictly control the process from raw material to finished product.
2.The customer comes first, we provide reasonable price, high quality product and prompt shipment.
3.We can send the goods to your delivery address directly. It is relatively safe and fast. We have ready goods in stock.
4.Quick and clear response to customers questions.
Warm after sale service, we will help to solve the problems in your usage.
5.We could make our price discount if you place a substantial order with us.
why choose us ?
1.Full experience of large numbers containers loading in Chinese sea port.
2.Fast shipment by reputed shipping line.
3.Packing with pallet as buyer's special request.
4.Best service after shipment with e mail.
5.Cargoes together with container sales service available.
6.Full experience for Canada & Japan export.
7.Cargoes photo before and after loading into container.
8.Raw materials from Chinese origin.
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