4-Chlorobenzenesulfonic acid CAS NO.98-66-8

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!

1:Safe shipping (TNT;EMS;FEDEX;DHL;UPS;EUB)

2:Safe payment(Btc;MoneyGram;WU)

3:Safe packing (Paraffin coating; Double aluminum foil bag; Vacuum packaging)

4:Fast delivery (3-10 DAYS fast home delivery service )

5:Best quality (Without any doping, all products are pure)

6:Safety guarantee (we do this business long time ,we know how to disguise let the product through customs)

8:New international transportation system(Pls see the pic,The transportation line reaches every corner of the world)

9:Huge Supply(We have many raw materials and processing centers,Each day can provide dozens of kilogram-hundreds of kilograms of different products.)

10:Low Price(All the products are factory prices it can let you have a bigger profit margin)

1.lowest price 

2.good service

3.best quality 

4.rich experience 

5.support sample

Details

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!

1:Safe shipping (TNT;EMS;FEDEX;DHL;UPS;EUB)

2:Safe payment(Btc;MoneyGram;WU)

3:Safe packing (Paraffin coating; Double aluminum foil bag; Vacuum packaging)

4:Fast delivery (3-10 DAYS fast home delivery service )

5:Best quality (Without any doping, all products are pure)

6:Safety guarantee (we do this business long time ,we know how to disguise let the product through customs)

8:New international transportation system(Pls see the pic,The transportation line reaches every corner of the world)

9:Huge Supply(We have many raw materials and processing centers,Each day can provide dozens of kilogram-hundreds of kilograms of different products.)

10:Low Price(All the products are factory prices it can let you have a bigger profit margin)

Our distribution capabilities include:
● Flexible deliveries, intelligent solutions
● Anything from bulk shipments of thousands of tonnes down to the smallest shipment of packed goods and even samples.
● Bulk – storage and transport of powders and liquids – movement of goods in ships – powders and bulk liquids
● Pharma, feed and food storage to accredited standards
● Segregated materials by business unit and hazard classification
● Temperature controlled storage and transport
● Effective cost control
● Re-packing, drum filling, bagging, ripping and tipping
● Customer delivery KPI's on delivery fulfillment performance

Production method: 

(1) By the p-aminobenzenesulfonic acid through diazotization, elimination of p-aminobenzenesulfonic acid, hydrochloric acid added to water, cooling to 20℃ below, drop sodium nitrite solution, reaction to the end point to obtain diazo solution. In addition, add copper sulfate and sodium chloride to water at about 80℃, and then add basic sodium sulfite solution after all dissolution. Add the reaction for 20 min, cool to room temperature, let it stand, clean the precipitation by pouring method, dissolve it with hydrochloric acid, cool to below 0℃, drop the above diazo solution, that is, p-chlorobenzenesulfonic acid is generated. The reaction solution was heated to 80℃, salted out with salt and filtered to obtain sodium p-chlorobenzenesulfonate. 

(2) The sulfonated chlorobenzene was obtained by adding 98% concentrated sulfuric acid and 10% fuming sulfuric acid into the reaction pot, stirring for 15min, gradually adding dry chlorobenzene, stirring at 95-100℃ for 5h, and checking the sulfonation end point. At the end, the acidity of the reactant is not more than 70%, and it can be completely dissolved in water.

Chemical properties: acicular crystal. The melting point is 67 ° C (68 ° C) and the boiling point is 147-148 ° C (3.33kPa). Soluble in water and ethanol.

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