Chemical Properties:
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.Shanghai Ruifu Chemical Co., Ltd. is the leading manufacturer and supplier of DL-Cysteine (H-DL-Cys-OH) (CAS: 3374-22-9) with high quality, production capacity 500 Tons per year. Ruifu Chemical supplys a series of amino acids and derivatives. We can provide COA, worldwide delivery, small and bulk quantities available. If you are interested in DL-Cysteine, Please contact: alvin@ruifuchem.comDescription:
Package & Storage:
| Chemical Name | DL-Cysteine |
| Synonyms | H-DL-Cys-OH; DL-Cys; Cysteine; (+/-)-Cysteine; (±)-2-Amino-3-Mercaptopropionic Acid; DL-2-Amino-3-Mercaptopropanoic Acid; DL-2-Amino-3-Mercaptopropionic Acid; (R,S)-2-Amino-3-Mercaptopropionic Acid |
| Stock Status | In Stock, Production Capacity 500 Tons per Year |
| CAS Number | 3374-22-9 |
| Molecular Formula | C3H7NO2S |
| Molecular Weight | 121.16 |
| Melting Point | 225℃(dec.) (lit.) |
| Boiling Point | 293.9±35.0℃ |
| Sensitive | Light Sensitive; Moisture Sensitive; Air Sensitive |
| Solubility | Soluble in Water (Partly), 1 N HCl (25 mg/ml), Ethanol, and Acetic Acid. Insoluble in Acetone |
| Stability | Stable. Incompatible With Strong Oxidizing Agents |
| Storage Temp. | Sealed in Dry, Store at Room Temperature |
| COA & MSDS | Available |
| Classification | Amino Acids & Derivatives |
| Brand | Ruifu Chemical |
Advantages:
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.FAQ:
Stable Supply: Maintain reasonable stock
Professional Service: One stop purchasing service
Technical Support: Technology solution available
Custom Synthesis Service: Ranged from grams to kilos
Fast Delivery: If within stock, three days delivery guaranteed
High Quality: Established a complete quality assurance system
Sufficient Capacity: Sufficient facilities and technicians
OEM Package: Custom package and label available
Specifications:
| Items | Inspection Standards | Results |
| Appearance | White Crystals or Crystalline Powder | Conforms |
| Identification | Infrared Absorption Spectrum | Conforms |
| Specific Rotation [α]20/D | -1.0° to +1.0°(C=8, 1 N HCl) | 0° |
| State of Solution (Transmittance) | Clear and Colorless ≥95.0% | 96.1% |
| Chloride (Cl) | ≤0.100% | <0.100% |
| Iron (Fe) | ≤5ppm | <5ppm |
| Heavy Metals (Pb) | ≤10ppm | <10ppm |
| Arsenic (As2O3) | ≤1.0ppm | <1.0ppm |
| Other Amino Acids | ≤2.00% | Conforms |
| Loss on Drying | ≤0.20% | 0.12% |
| Residue on Ignition (Sulfated) | ≤0.10% | 0.05% |
| Assay | 98.0~102.0% | 99.9% |
| Conclusion | This Product by Inspection Accords with the Standard of AJI97 | |
| Main Uses | Amino Acids; Food Additives; Pharmaceutical Intermediates | |
3374-22-9 - Risk and Safety:
Application:
3374-22-9 - Risk and Safety Hazard Codes Xn,Xi,C Risk Codes R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R36/37/38 - Irritating to eyes, respiratory system and skin. R22 - Harmful if swallowed R35 - Causes severe burns Safety Description S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S37/39 - Wear suitable gloves and eye/face protection S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. UN IDs UN 2923 6.1(8) / PGIII WGK Germany 3 RTECS HA1595000 FLUKA BRAND F CODES 8-10-23 HS Code 29309013DL-Cysteine (H-DL-Cys-OH) (CAS: 3374-22-9), a sulfur-containing amino acid that is propanoic acid with an amino group at position 2 and a sulfanyl group at position 3. DL-Cysteine is a covalently linked dimeric nonessential amino acid formed by the oxidation of CYSTEINE. Two molecules of cysteine are joined together by a disulfide bridge to form cystine. Cystine is a nonessential amino acid that acts as a nutrient and dietary supplement. It is very slightly soluble in water and in alcohol. it improves the biological quality of the total protein in foods containing naturally occurring intact protein. DL-Cysteine is a non-essential amino acid that can be synthesized by the human body under normal physiological conditions if a sufficient quantity of methionine is available. Cysteine is commonly used as a precursor in the food and pharmaceutical industries. Cysteine is used as a processing aid for baking, as an additive in cigarettes, as well as in the preparation of meat flavours.3374-22-9 AJI 97 Test Method:
DL-Cysteine (CAS: 3374-22-9) AJI 97 Test Method Identification: Compare the infrared absorption spectrum of the sample with that of the standard by potassium bromide disc method. State of Solution (Transmittance): 0.5g in 50ml of H2O, spectrophotometer, 430nm, 10mm cell thickness. Chloride (Cl): 0.14g, A-5, ref: 0.40ml of 0.01mol/L HCl Iron (Fe): 0.6g, ref: 0.3ml of Iron Std. (0.01mg/ml) 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, A-2-a, control; L-Cystine 0.2μg Loss on Drying: In vacuum, at room temperature for 3 hours. Residue on Ignition (Sulfated): AJI Test 13 Assay: Dried sample, 250mg, 0.05mol/L I2 1ml=12.116mg C3H7NO2S Other Amino Acids: Dissolve 200mg of the sample in 2% N-ethyl-maleimide aqueous solution to make 100ml of test solution. Dissolve 40mg of L-Cystine in small quantity of 2mol/L HCl and add water to make 100ml solution. Dilute 10ml of the solution accurately in water to make 100ml of standard solution. Allow to stand for 30 minutes and then proceed as directed for procedure under AJI TEST 9.