D-Cystine CAS 349-46-2 Assay ≥98.5% (Titration)

Short Description:

Chemical Name: D-Cystine 

Synonyms: (H-D-Cys-OH)2

CAS: 349-46-2

Assay: ≥98.5% (Titration)

Appearance: White to Off-White Crystalline Powder 

Contact: Dr. Alvin Huang

Mobile/Wechat/WhatsApp: +86-15026746401

E-Mail: alvin@ruifuchem.com


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349-46-2 - Description:

Shanghai Ruifu Chemical Co., Ltd. is the leading manufacturer of D-Cystine (CAS: 349-46-2) with high quality.
D-Cystine is mainly used in pharmaceuticals, peptide synthesis, food additives, biotechnology, cosmetics and etc.
Ruifu Chemical has been supplying amino acids and derivatives more than 15 years.

Ruifu Chemical can provide worldwide delivery, competitive price, excellent service.
Purchase D-Cystine or other products, please contact us by e-mail: alvin@ruifuchem.com

349-46-2 - Chemical Properties:

Chemical Name D-Cystine
Synonyms D-(+)-Cystine; (H-D-Cys-OH)2; H-D-(Cys)_2-OH; Dextro-Cystine; H-D-Cystine; (+)-3,3'-Dithiobis(2-Aminopropionic Acid); (S,S)-3,3''-Dithiobis(2-Aminopropionic Acid)
Stock Status In Stock, Commercial Production  
CAS Number 349-46-2
Molecular Formula C6H12N2O4S2
Molecular Weight 240.30 g/mol
Melting Point 265℃(dec.) (lit.) 
Water Solubility  Insoluble in Water 
Solubility in HCl Colorless and Transparent Solution
Storage Temperature Store Long-Term in a Cool and Dry Place  
COA & MSDS Available
Origin of Product    Shanghai, China
Product Categories
Amino Acids and Derivatives 
Brand Ruifu Chemical

349-46-2 - Specifications:

Items Specifications  Results
Appearance White to Off-White Crystalline Powder   White Crystalline Powder 
Specific Rotation [α]20/D +205.0° - +225.0° (C=1 in 1N HCl)  +210.3°
Loss on Drying ≤0.50% 0.30%
Residue on Ignition ≤0.10% 0.04%
Iron (Fe) ≤20ppm <5ppm 
Heavy Metals (Pb) ≤10ppm <10ppm 
Assay / Analysis Method ≥98.5% (Titration)  99.78%
1H NMR Spectrum Conforms to Structure   Conforms   
Conclusion The product has been tested and complies with the given specifications

349-46-2 - Package/Storage/Shipping:

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. 

349-46-2 - 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

349-46-2 - 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 AssuranceStrict 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.

SamplesMost products provide free samples for quality evaluation, shipping cost should be paid by customers.

Factory AuditFactory audit welcome. Please make an appointment in advance.

MOQ? No MOQ. Small order is acceptable.

Delivery Time? If within stock, three days delivery guaranteed.

TransportationBy Express (FedEx, DHL), by Air, by Sea.

Documents? After sales service: COA, MOA, ROS, MSDS, etc. can be provided.

Custom SynthesisCan provide custom synthesis services to best fit your research needs.

Payment TermsProforma invoice will be sent first after confirmation of order, enclosed our bank information. Payment by T/T (Telex Transfer), PayPal, Western Union, etc. 

349-46-2 - Risk and Safety:

Risk Codes R36/37/38 - Irritating to eyes, respiratory system and skin.
R22 - Harmful if swallowed
Safety Description S22 - Do not breathe dust.
S24/25 - Avoid contact with skin and eyes.
S37/39 - Wear suitable gloves and eye/face protection
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
HS Code 2922491990

349-46-2 - Scientific Research Applications:

D-Cystine (CAS: 349-46-2) is the D-enantiomer of cystine. It is an enantiomer of a L-cystine. D-Cystine is a non-proteinogenic amino acid that is composed of two cysteine molecules linked by a disulfide bond.
D-Cystine has potential applications in the food, pharmaceutical and drug development, protein engineering, biotechnology, and cosmetics industries.

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