Shanghai Ruifu Chemical Co., Ltd. is the leading supplier of D-Cysteine Hydrochloride Monohydrate (H-D-Cys-OH·HCl·H2O) (CAS: 32443-99-5) with high quality. Ruifu Chemical supplys a series of amino acids and derivatives. Our products have reached or exceeded the international specifications, such as AJI, USP, EP, JP and FCC, which are exported to many countries at home and abroad. Ruifu Chemical can provide COA, worldwide delivery, small and bulk quantities available. If you want to purchase, Please contact: alvin@ruifuchem.com
| Chemical Name | D-Cysteine Hydrochloride Monohydrate |
| Synonyms | H-D-Cys-OH·HCl·H2O; D-Cys·HCl·H2O; H-D-Cys-OH·H2O·HCl; D-Cysteine HCl Monohydrate; H-D-Cys-OH·HCl Monohydrate; D-2-Amino-3-Mercaptopropionic Acid Hydrochloride Monohydrate |
| Stock Status | In Stock, Production Capacity 500 Tons per Year |
| CAS Number | 32443-99-5 |
| Molecular Formula | C3H7NO2S·HCl·H2O |
| Molecular Weight | 175.63 g/mole |
| Melting Point | 185℃(dec.) |
| Sensitive | Hygroscopic. Moisture Sensitive |
| Water Solubility | Soluble in Water |
| Solubility | Slightly Soluble in Ethanol, With a Slight Smell of Organic Sulfide |
| Storage Temp. | Sealed in Dry, Store at Room Temperature |
| COA & MSDS | Available |
| Classification | Amino Acids and Derivatives |
| Brand | Ruifu Chemical |
| Items | Inspection Standards | Results |
| Appearance | White Crystals or Crystalline Powder | Conforms |
| Identification | Meets the Requirements | Conforms |
| Specific Rotation [α]20/D | -6.1° to -7.8°(C=8 in 1N HCl) |
-6.3° |
| State of Solution (Transmittance) | Clear and Colorless ≥98.0% | 99.0% |
| Chloride (Cl) | 19.89~20.29% | 20.2% |
| Sulfate (SO4) | ≤0.020% | <0.020% |
| Ammonium (NH4) | ≤0.020% | <0.020% |
| Iron (Fe) | ≤10ppm | <10ppm |
| Heavy Metals (Pb) | ≤10ppm | <10ppm |
| Arsenic (As2O3) | ≤1.0ppm | <1.0ppm |
| Other Amino Acids | Chromatographically Not Detectable | Conforms |
| Loss on Drying | 8.50~12.0% | 9.97% |
| Residue on Ignition (Sulfated) | ≤0.10% | 0.06% |
| Assay | 98.5 to 101.0% (on Dried Basis) | 99.7% |
| Conclusion | This Product by Inspection Accords with the Standard of AJI97 | |
| Shelf Life | 24 Months From Manufacture Date if Stored Properly | |
D-Cysteine Hydrochloride Monohydrate (H-D-Cys-OH·HCl·H2O) (CAS: 32443-99-5) AJI 97 Test Method
D-Cysteine Hydrochloride Monohydrate, when dried, containes not less than 98.5 percent and not more than 101.0 percent of D-Cysteine Hydrochloride (C3H7NO2S·HCl).
Solubility (H2O, g/100g): about 67 (25℃)
Identification: (1) To 5ml of a solution of D-Cysteine Hydrochloride Monohydrate (1→1000) add 0.5ml of pyridine and 1ml of 1% ninhydrin solution and heat for 3 minutes; a purple or purplish brown color is produced.
(2) To 5ml of a solution of D-Cysteine Hydrochloride Monohydrate (1→1000) and 2ml of 10% sodium hydroxide solution and two drops of 5% sodium nitroferricyanide solution; a red-purple color is produced.
(3) Take the small amounts of the test sample on the copper wire. Burn in the gas flame, then a green color is produced (Beilstein reaction).
Specific Rotation [α]20/D: Dried sample, C=8, 1mol/L HCl
State of Solution (Transmittance): 1.0g in 10ml of H2O, spectrophotometer, 430nm, 10mm cell thickness.
Chloride (Cl): 350mg, B-2
Ammonium (NH4): A-1
Sulfate (SO4): 1.2g, (1), ref: 0.50ml of 0.005mol/L H2SO4
Heavy Metals (Pb): 2.0g, (1), pH=7, 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, A-1-a
Loss on Drying: In vacuum, P2O5, at room temperature for 20 hous.
Residue on Ignition (Sulfated): AJI Test 13
Assay: Dried sample, 250ml, 0.05mol/L I2 1ml=15.762mg C3H7NO2S·HCl
Other Amino Acids: Dissolve 200mg of the sample in 2% N-ethyl-maleimide aqueous solution to make 100ml and allow to stand for 30 minutes and then proceed as directed for procedure under AJI TEST 9.
Package: Fluorinated bottle, Aluminium foil bag, 25kg/cardboard drum, or according to customer's requirement.
Storage Condition: Keep the container tightly closed. Store in a cool, dry (2-8℃) and well-ventilated warehouse away from incompatible substances. Keep away from sunshine; avoid fire and heat sources; avoid moisture.
Shipping: Deliver to worldwide by air, by FedEx / DHL Express. Provide fast and reliable delivery.
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.
| Hazard Codes | Xi - Irritant |
| Risk Statements | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Statements | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
| WGK Germany | 3 |
| F | 3-10-23 |
| HS Code | 2930901000 |
D-Cysteine Hydrochloride Monohydrate (H-D-Cys-OH·HCl·H2O) (CAS: 32443-99-5), Amino Acids and Derivatives; Peptide Synthesis; Pharmaceutical Intermediates; Food and feed additives. It is used in the synthesis of proteins, as a reagent for the synthesis of other compounds, and as a component in certain pharmaceuticals. In the pharmaceutical industry, it may be used as a drug target or as a component in drug delivery systems. In the food industry, it may be used as a flavor enhancer or taste modifier.
There are a number of potential future directions for the use of D-Cysteine Hydrochloride Monohydrate. These include its use in the development of new drugs, the study of its effects on gene expression and enzyme activities, and the study of its effects on drug metabolism and drug-receptor interactions. Additionally, its use in the study of protein structure and function, as well as its potential use as an antioxidant and chelating agent, should be further explored. Finally, its potential use in the development of new diagnostic and therapeutic techniques should be investigated.