DL-Cysteine CAS 3374-22-9 Assay 98.0~102.0%

Short Description:

Chemical Name: DL-Cysteine

Synonyms: H-DL-Cys-OH; DL-Cys

CAS: 3374-22-9

Assay: 98.0~102.0%

Appearance: White Crystals or Crystalline Powder

Amino Acid Derivative, High Quality

Contact: Dr. Alvin Huang

Mobile/Wechat/WhatsApp: +86-15026746401

E-Mail: alvin@ruifuchem.com

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Product Detail

Product Tags

Description:

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.com

Chemical Properties:

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

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 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.

Package & Storage:

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.

Advantages:

Sufficient Capacity: Sufficient facilities and technicians

Professional Service: One stop purchasing service

OEM Package: Custom package and label available

Fast Delivery: If within stock, three days delivery guaranteed

Stable Supply: Maintain reasonable stock

Technical Support: Technology solution available

Custom Synthesis Service: Ranged from grams to kilos

High Quality: Established a complete quality assurance system

FAQ:

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.

3374-22-9 - Risk and Safety:

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 29309013

Application:

DL-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.