L-Cysteine Methyl Ester Hydrochloride CAS 18598-63-5 (H-Cys-OMe·HCl) Assay 98.5~101.0% Factory
Shanghai Ruifu Chemical Co., Ltd. is the leading manufacturer and supplier of L-Cysteine Methyl Ester Hydrochloride (H-Cys-OMe·HCl) (CAS: 18598-63-5) with high quality. Ruifu Chemical supplys a series of amino acids and derivatives. Our products are exported to Europe, USA, Australia, Southeast Asia and other countries, deeply trusted by customers. We can provide worldwide delivery, competitive price, small and bulk quantities available. Purchase L-Cysteine Methyl Ester Hydrochloride, Please contact: alvin@ruifuchem.com
| Chemical Name | L-Cysteine Methyl Ester Hydrochloride |
| Synonyms | H-Cys-OMe·HCl; L-Cys-OMe HCl; L-Cysteine Methyl Ester HCl; Laevo-Cysteine Methyl Ester Hydrochloride; L-Cysteine Methyl Ester Monohydrochloride; Mecysteine Hydrochloride; (R)-Cysteine Methyl Ester Hydrochloride; Methyl (R)-2-Amino-3-Mercaptopropanoate Hydrochloride; Methyl L-Cysteinate Hydrochloride; Methyl Cysteine Hydrochloride |
| Stock Status | In Stock, Production Capacity 20 Tons per Month |
| CAS Number | 18598-63-5 |
| Molecular Formula | C4H9NO2S·HCl |
| Molecular Weight | 171.64 |
| Melting Point | 138.0~141.0℃(dec.)(lit.) |
| Water Solubility | Very Soluble in Water, about 100 g/100g (25℃), Almost Transparency |
| Solubility | Very Soluble in Water, Freely Soluble in Methanol, Soluble in Ethanol, Practically Insoluble in Ether. Slightly Hygroscopoc Property. |
| Storage Temp. | Sealed in Dry, Store at Room Temperature |
| COA & MSDS | Available |
| Classification | Amino Acids and Derivatives |
| Brand | Ruifu Chemical |
| Hazard Codes | Xi - Irritant | RTECS | HA2460000 |
| Risk Statements | 36/37/38 | F | 1-10 |
| Safety Statements | 26-36-37/39 | HS Code | 2930909099 |
| WGK Germany | 2 |
| Items | Inspection Standards | Results |
| Appearance | White Crystals or Crystalline Powder; Slightly Characteristic Taste | Conforms |
| Specific Rotation [α]20/D | -1.5° to -3.5°(C=20 in MeOH) |
-2.5° (C=20 in MeOH) |
| State of Solution (Transmittance) | Clear and Colorless ≥98.0% | 98.3% |
| Melting Point | 138.0~141.0℃ | 138.0~138.8℃ |
| Chloride (Cl) | 20.35~20.87% | Conforms |
| Sulfate (SO4) | ≤0.048% | <0.048% |
| Ammonium (NH4) | ≤0.020% | <0.020% |
| Heavy Metals (Pb) | ≤10ppm | <10ppm |
| Arsenic (As2O3) | ≤1.0ppm | <1.0ppm |
| Other Amino Acids | Conforms | Conforms |
| Loss on Drying | ≤0.40% | 0.35% |
| Residue on Ignition (Sulfated) | ≤0.10% | 0.09% |
| Assay | 98.5 to 101.0% | 99.3% |
| pH Value | 2.9 to 3.8 (1.0g in 20ml of H2O) | 3.1 |
| Conclusion | This Product by Inspection Accords with the Standard of AJI97 | |
L-Cysteine Methyl Ester Monohydrochloride, when dried, contains not less than 98.5 percent and not more than 101.0 percent of L-Cysteine Methyl Ester Monohydrochloride (C4H9NO2S·HCl).
Description: White crystals or crystalline Powder, slightly characteristic taste
Very soluble in water, freely soluble in methanol, soluble in ethanol, practically insoluble in ether. Slightly hygroscopoc property.
Solubility (H2O, g/100g): about 100 (25℃)
Identification: (1) To 2ml of a solution of Cysteine Methyl Ester Monohydrochloride (1→200) add 1ml of pyridine and 1ml of ninhydrin T.S. (2%); a red color is produced.
(2) To 5ml of a solution of Cysteine Methyl Ester Monohydrochloride (1→100) add dilute ferric chloride T.S.; a blue color is produced, and it gradually changes to green.
(3) To 5ml of a solution of Cysteine Methyl Ester Monohydrochloride (1→100) add a few drops of cupric sulfate T.S.; a light yellow color is produced and a red-violet color is produced by adding more drops of cupric sulfate T.S.
(4) To a solution of Cysteine Methyl Ester Monohydrochloride (1→100) add sulfuric acid and potassium permanganate and heat; the chlorine gas evolved changes potassium iodine starch paper moistened with water to blue.
Specific Rotation [α]20/D: Dried sample, C=20, methanol
State of Solution (Transmittance): 1.0g in 10ml of H2O, spectrophotometer, 430nm, 10mm cell thickness.
Chloride (Cl): Dried sample, 340mg, B-2
Ammonium (NH4): A-1
Sulfate (SO4): 0.50g, (1), ref: 0.50ml of 0.005mol/L H2SO4
Heavy Metals (Pb): 2.0g, (1), ref: 2.0ml of Pb Std. (0.01mg/ml)
Arsenic (As2O3): 2.0g, (1), ref: 2.0ml of As2O3 Std.
Other Amino Acids: Test Sample: 10μg, PA-P1, control; L-Cys.HCl.H2O 0.1μg
Loss on Drying: In vacuum, P2O5, at room temperature for 5 hours.
Residue on Ignition (Sulfated): AJI Test 13
Assay: Iodometry
pH: 1.0g in 20ml of H2O
Melting Point: AJI Test 36
Recommended storage limit and condition: Preseved tight containers at controlled room temperature (1/2 years).
Package: Fluorinated Bottle, 25kg/bag, 25kg/Cardboard Drum, or according to customer's requirement.
Storage Condition: Store in sealed containers at cool, dry and ventilated warehouse away from incompatible substances. Protect from light and moisture. Protect from heat. Store away from oxidizing agents.
How to Purchase? Please contact Dr. Alvin Huang: sales@ruifuchem.com or alvin@ruifuchem.com
15 Years Experience? We have more than 15 years of experience in the manufacture and export of a wide range of high quality pharmaceutical intermediates or fine chemicals.
Main Markets? Sell to domestic market, North America, Europe, India, Korea, Japanese, Australia, etc.
Advantages? Superior quality, affordable price, professional services and technical support, fast delivery.
Quality Assurance? Strict quality control system. Professional equipment for analysis include NMR, LC-MS, GC, HPLC, ICP-MS, UV, IR, OR, K.F, ROI, LOD, MP, Clarity, Solubility, Microbial limit test, etc.
Samples? Most products provide free samples for quality evaluation, shipping cost should be paid by customers.
Factory Audit? Factory audit welcome. Please make an appointment in advance.
MOQ? No MOQ. Small order is acceptable.
Delivery Time? If within stock, three days delivery guaranteed.
Transportation? By Express (FedEx, DHL), by Air, by Sea.
Documents? After sales service: COA, MOA, ROS, MSDS, etc. can be provided.
Custom Synthesis? Can provide custom synthesis services to best fit your research needs.
Payment Terms? Proforma invoice will be sent first after confirmation of order, enclosed our bank information. Payment by T/T (Telex Transfer), PayPal, Western Union, etc.
Function and Application of L-Cysteine Methyl Ester Hydrochloride (H-Cys-OMe·HCl) (CAS: 18598-63-5)
1. Amino acids and derivatives, used in peptide synthesis, organic synthesis intermediates, pharmaceutical intermediates, biochemical reagents, chemical reagents.
2. L-Cysteine Methyl Ester Hydrochloride is a mucolytic agent. An effective drug for the treatment of liver failure. Shown to effectively inhibit the binding of ethynylestradiol metabolites to protein and nucleic acids.
3. L-Cysteine Methyl Ester Hydrochloride is a biochemical shown to inhibit binding of ethynylestradiol metabolites to protein and nucleic acids. It used in the synthesis of peptides, Preparation of thiazolidine-4-carboxylates with carbonyl compounds.
4. L-Cysteine Methyl Ester Hydrochloride is an antitussive, and an expectorant agent, used to relieve breathing difficulties caused by mucus.
5. L-Cysteine Methyl Ester Hydrochloride is mainly used in the field of medicine: the drug made can clinically treat leukopenia and leukopenia caused by the administration of anticancer drugs and radioactive drugs Chemicalbook, is an antidote to heavy metal poisoning, and is also used to treat toxic hepatitis, thrombocytopenia, skin ulcers, and to prevent hepatic necrosis, and has the effect of treating bronchitis and resolving phlegm.
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