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Manufacturer high quality S-Carboxymethyl-L-cysteine/Carbocistein with best price 638-23-3
≥1 Kilogram
$15.50
- Item No. TOPMOQ 1 Kilogram
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If over 500pcs, mass production will start until pre-production sample has been approved.
Est. 7 days production
Product Description
| Product Name | S-carboxymethyl-L-cysteine |
| CAS number | 638-23-3 |
| Molecular formula | C5H9NO4S |
| Molecular weight | 179.19 |
| Appearance | white to slightly off-white amorphous powder |
| Melting point | 205-207ºC |
| Flash point | 191.8ºC |
| Relative density | 1.451g/cm3 |
Certification of Analysis
Test Item | Specification: European Pharmacopoeia 7TH | |
Description | A white, crystalline powder, practically insoluble in water, in alcohol and in ether. It dissolves in dilute mineral acids and in dilute solutions of alkali hydroxides. | |
Identification | Test A (Specific Optical rotation) | It complies with the test for specific optical rotation. |
Test B(IR) | The IR spectrum of the sample is concordant with the spectrum of the reference standard, Carbocisteine CRS. | |
Test C(TLC) | The principal spot in the chromatogram obtained with the test solution (b) is similar in position, color and size to the principal spot in the chromatogram obtained with the reference solution(a) | |
Test D(Chemical reaction) | . Dark red color is produced, which changes to brown and then to yellow within a few minutes. | |
pH | 2.8 ~3.0 | |
specific rotation [α]D 20 | -32.5° ~ -35.5° | |
State of solution (Transmittance) | Solution S is clear and colourless Not less than 95.0% | |
Ninhydrin-positive substances | Not more than 0.5% | |
Chloride(Cl) | Not more than 0.15% | |
Sulfate(SO4) | Not more than 0.03% | |
Heavy metals(Pb) | Not more than 0.001% | |
Loss on Drying | Not more than 0.5% | |
Residue on ignition(sulfated) | Not more than 0.3% | |
Assay | 98.5% ~ 101.0 % | |
Function&Application
Hair finishing agent and adjusting agent, it can resist acne.
It can be used in the curing of chronic tracheitis, emphysema, pulmonary.
Qingdao Sigma chemical Co., Ltd is is a global chemical industry manufacturers and suppliers of pharmaceuticals and intermediates, food and feed additives, herbal extracts, agrochemicals and fine chemicals etc.
The aim of Qingdao Sigma chemical Co., Ltd is a quality policy that "Elements in the system all have been satisfied, Personnel has been trained; Every batch of material is checked, Each procedure guarantees the quality; Every bag of our products is top grade, Service is thoughtful all the time, quality and reputation to increase market share and promote enterprise development. The quality, colors and forms of our products have reached a high level in related chemical industry, which relies on characteristic and advanced processing technology and it has gained a high and reliable reputation from customers at both quality and services.
Answer: Yes, we are factory founded on 2002.
Q2: How to contact with us?
Click the Alibaba "Contact Supplier" And then send us message the product you interest in, you will get reply within 24 hours.
Q3:Which kind of payment terms do you accept?
For small order,you can pay by T/T,Western Union or Paypal,nomal order by T/T to our company account
Q4:Can you give me a discount price?
Surely,It depend on your qty
Q5:How can i get a sample?
free samples is available,but freight charges will be at your account and the charges will be return to you or deduct from your order in the future.
Q6: How to confirm the Product Quality before placing orders?
A: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.
Q7:How do you treat quality complaint?
A: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.
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