Chemical properties:
Sulfur dioxide urea is also known as formamidine sulfonic acid, amino-methane sulfonic acid. A stable compound that is neither oxidizing nor reducing. The precipitated from ethanol is colorless to white acicular crystal or crystalline powder. No smell. Molecular weight 108.12. The relative density is 1.4. Melting point 126℃(decomposition). The solubility in water at room temperature is 2% ~ 3%, and the aqueous solution is neutral or weakly alkaline. At 50 ~ 60℃ or in the lye decomposition, and free sulfonic acid and urea. Soluble in concentrated sulfuric acid, also slightly soluble in acetic acid, insoluble in general organic solvents. When dry and low temperature, the product is stable; It is easy to turn yellow under high temperature and humid conditions, and release heat, and precipitate is generated above 30 ° C. Rat transoral LD502260mg/kg.
Purpose:
As a reducing agent, urea sulfur dioxide is widely used in dyeing industry for wool bleaching, dyeing of VAT dyes and sulphur dyes, reduction washing agent for disperse dyes, discharge and decoloring agent. In organic synthesis, it is used to reduce ketone, quinone, nitro, azo, azo oxide, azo oxide, hypodiazo compounds and organic sulfides. Urea sulfur dioxide is also used as a variety of decolorizing agent, is a sensitizer for photo-gaging latex, and a chemical agent for separating rare metals rhodium and iridium, which can improve the stability of polyethylene. Adding urea sulfur dioxide in the evaporation process of polyacrylonitrile and polymerization can improve the color of polyacrylonitrile, which is an important supporting product for synthetic fiber production. This product is also widely used in the production of fine chemical products such as medicine and spices.
Melting Point | 124-127 °C |
Boiling Point | 355.3±25.0 °C |
Density | 1.68 |
Vapor Pressure | 0Pa at 25℃ |
Refractive Index | 1.6550 |
Storage Condition | 2-8°C |
Solubility | 27g/L |
pKa | 4 (10g/l, H2O, 20℃) |
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
China
