Factory Supply 99% Carbocistein CAS 2387-59-9 S-Carboxymethyl-L-Cysteine

L-cysteine is prepared as a disodium salt aqueous solution. It reacts with chloroacetic acid in the presence of sodium metabisulfite. The reaction is carried out first at 20-30℃ for 0.5 hours, then at 20℃ for 15 minutes. Activated carbon is added to the reaction mixture, and the mixture is filtered. resulting in the formation of salicylate precipitate. The precipitate is filtered, washed with water, and dried under vacuum to obtain the product. The yield based on L-cysteine is 92%.

White crystalline powder; odorless, acidic; soluble in water (with a solubility of 1.6g/L), a drug for dissolving phlegm, occasionally causing mild dizziness, nausea, stomach discomfort, diarrhea, gastrointestinal bleeding, rash, etc. Caution should be exercised for patients with digestive tract problems. This product is a mucilage dissolver, expectorant, and anti-rhinovirus medication. It is mainly used for the treatment of diseases such as chronic bronchitis, bronchial asthma, where phlegm is thick, difficulty in expectoration, and phlegm blocking the trachea.

Xian Harmonious Natural Bio- Technology Co., Ltd was founded in 2017, and located in Xian International Logistics Industrial Zone, Xian City. Shaanxi Province, China. Now it is the leading researcher and one of the biggest manufacturer in high technology APl area.

There are 8 experts in our research team. We insistin innovation and produce high quality products. And GMP standard workshop and complete stainless extraction equipment.

We have 2 sales deparments over 20 people and sell our products allover the word. We also have strong professional research and development team talented personnel and completely equipped laboratoy for the quality controlling. Various Detection Device is equipped in HNB company, such as HPLCGC, Spectrophotometer, AAS, Polarimeter, Auto titrators, BOD Incubators, COD Incubators, Melting point apparatus and so on.
HNB mainly engaged in export of products incuding,without limitation., pharmaceutical raw materials both for vet and human, also Vitamins, Amino Acids minerals, peptides, plant extract, feed and food additives. Our company's business is based on Honest, Trustwortly, Constanty to Go Beyond and Achieve Mutual Win. Sincerely hope to strengthen exchanges and cooperation with friends from both home and abroad.
Passion to innovate, Power to deliver !

Q1 Can i get some samples?

A1 Yes, we can supply the free sample, but the shipping cost be paid by our customers.

Q2 How to start orders or make payments?

A2 Proforma invoice will be sent first after confirmation of order, enclosed our bank information.

Payment by T/T,or Paypal or Escrow(Alibaba).

Q3 How to confirm the Product Quality before placing orders?

A3 You can get free samples for some products,you only need to pay the shipping cost or arrange a courier

to us and take the samples. You can send us your product specifications and requests,we will manufacture

the products according to your requests.

Q4 What’s your MOQ?

A4 Our MOQ is 1kg. But usually we accept less quantity such as 100g on the condition that sample charge

is 100% paid.

Q5 How about delivery leadtime?

A5 Delivery lead time: About 3-5 days after payment confirmed. (Chinese holiday not included)

Q6 Is there a discount?

A6 Different quantity has different discount.

Q7 How do you treat quality complaint?

A7 First of all, our quality control will reduce the quality problem to near zero. If there is a real quality problem

caused by us, we will send you free goods for replacement or refund your loss.

Q8 How to contact us ?

A8 You can choose your interested products and send inquiry to us.