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L-Cystine

Name: L-Cystine
Brand: SNC | Good Fortune
SKU: pr2112281044
Price: 15.8 USD
Availability: InStock

4 Inquiries

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CAS No.:

56-89-3

Grade:

food grade

Content:

98.5%

Brand:

SNC | Good Fortune

Packaging:

25Kg/bag

Sample Available:

Yes

Price valid (until):

2022-03-31

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SNC | GOOD FORTUNE

Company Type:

Manufactory

Location:

China

Payment Terms:

TT against copy of documents,D/P,L/C,D/A,O/A,TT against B/L draft before shipment,100% TT in advance

Average Lead Time:

25 days

Qualification:

Main Products:

BCAA,Ascorbic Acid (Vitamin C),Monk Fruit Extract,Acai Berry Extract,Taurine,AAKG

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Product Description
Seller Information
Inquiry History

Description

Product Detail

Name	L-Cystine
Synonyms	L(-)-3,3'-Dithiobis(2-aminopropanoic acid); 2-Amino-3-[(2-amino-2-carboxyethyl)dithio]propanoic acid
Molecular Structure
Molecular Formula	C6H12N2O4S2
Molecular Weight	240.29
CAS	56-89-3
Melting Point	+24.5~+26.8°
Alpha	-224 º(c=2 in 1M HCl)
Water Solubility	0.112 g/L (25 ºC)
Safety Description	S24/25

Product Specifications

Testing Items	Specifications	Results
Appearance	White crystal or crystalline powder	Conforms
Identification	Infrared absorption	Conforms
Specific Rotation [α]D20	-215°~ -225°	-215.6°
Loss on Drying	NMT 0.3%	0.20%
Residue on Ignition	NMT 0.10%	0.07%
Chloride（Cl）	NMT 0.02%	Conforms
Sulfate (SO4)	NMT 0.02%	Conforms
Heavy Metals	NMT10ppm	Conforms
Arsenic (as As2O3)	NMT 1ppm	Conforms
Organic Volatile Impurities	Meet the Requirement	Conforms
Chromatographic Purity	Meet the Requirement	Conforms
Assay	98.5% ~ 101.5%	99.50%
Storage Conditions
Store in cool & dry place. Do not freeze, Keep away from strong light and heat.

About Us

SNC was established in 2006. After years of development, Good Fortune International joined the team in 2017 to jointly provide one-stop services for global users in the research and development, production, logistics, and sales of food, medicine, nutrition and health, and sports supplements.

The company has keen market observation and judgment, provides customers with the highest quality products and services with fast and sensitive response, and provides customers with "one-stop all-round" services! Committed to supplying healthy raw materials to the world, providing the highest quality raw materials for the world's health products, sports supplements, cosmetics, pharmaceuticals and other fields.

ECHEMI Editorial Reference

L-Cystine is an amino acid and intracellular thiol, which plays a critical role in the regulation of cellular processes.
DryPowder|Solid
L-cystine is the L-enantiomer of the sulfur-containing amino acid cystine. It has a role as a flour treatment agent, a human metabolite, a Saccharomyces cerevisiae metabolite, a mouse metabolite and an EC 1.2.1.12 (aspartate-semialdehyde dehydrogenase) inhibitor. It is a cystine, a L-cysteine derivative and a non-proteinogenic L-alpha-amino acid. It is a conjugate acid of a L-cystine anion. It is an enantiomer of a D-cystine. It is a tautomer of a L-cystine zwitterion.|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 not considered one of the 20 amino acids, Cystine is a sulfur-containing derivative obtained from oxidation of cysteine amino acid thiol side chains. It functions as an antioxidant and protects tissues against radiation and pollution, slowing the aging process. It also aids protein synthesis. Cystine is abundant in many proteins of skeletal tissues and skin, and found in insulin and digestive enzymes chromotrypsinogen A, papain, and trypsinogen. (NCI04)|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.

Basic Info

Product Name:

(-)-Cystine

Other Name:

L-Cystine;Cystine,L-;Bis(β-amino-β-carboxyethyl) disulfide;Cystine acid;β,β′-Diamino-β,β′-dicarboxydiethyl disulfide;Dicysteine;3,3′-Dithiobis(2-aminopropanoic acid);β,β′-Dithiodialanine;Cystine;L-Cysteine disulfide;Propanoic acid,3,3′-dithiobis[2-amino-,[R-(R*,R*)]-;(-)-Cystine;L-Cystin;L-(-)-Cystine;Oxidized L-cysteine;[R-(R*,R*)]-3,3′-Dithiobis[2-aminopropanoic acid];l-Cystine;L-Alanine,3,3′-dithiobis-;NSC 13203;24645-67-8;154605-69-3

CAS No.:

56-89-3

Molecular Formula:

C6H12N2O4S2

InChIKeys:

InChIKey=LEVWYRKDKASIDU-IMJSIDKUSA-N

Molecular Weight:

240.30000

Exact Mass:

240.30

EC Number:

206-486-2

UNII:

48TCX9A1VT

DSSTox ID:

DTXSID2046418

NCI Thesaurus Code:

C29610

HScode:

2930901000

Categories:

Amino Acids and Derivatives

Characteristics

PSA:

177.24000

XLogP3:

-6.3

Appearance:

DryPowder

Density:

1.677 g/cm³

Melting Point:

260.5 °C (decomp)

Boiling Point:

468.2ºC at 760 mmHg

Flash Point:

237ºC

Refractive Index:

1.653

Water Solubility:

H2O: 0.112 g/L (25 ºC);1 M HCl: 100 mg/mL

Storage Conditions:

Store at RT.

PKA:

1None

Dissociation Constants:

Collision Cross Section:

149.4 Å² [M+H]+ [CCS Type: DT, Method: single field calibrated with Agilent tune mix (Agilent)]|145 Å² [M+H]+ [CCS Type: TW, Method: calibrated with polyalanine]|149.4 Å² [M+H]+ [CCS Type: DT, Method: single field calibrated with ESI Low Concentration Tuning Mix (Agilent)]|151.2 Å² [M+Na]+ [CCS Type: DT, Method: single field calibrated with ESI Low Concentration Tuning Mix (Agilent)]|143 Å² [M-H]- [CCS Type: DT, Method: single field calibrated with ESI Low Concentration Tuning Mix (Agilent)]|147.3 Å² [M+Na-2H]- [CCS Type: DT, Method: single field calibrated with ESI Low Concentration Tuning Mix (Agilent)]|148.1 Å² [M+H]+ [CCS Type: TW, Method: calibrated with polyalanine and drug standards]|144.39 Å² [M-H]- [CCS Type: DT, Method: stepped-field]|150.08 Å² [M+H]+ [CCS Type: DT, Method: stepped-field]|151.81 Å² [M+Na]+ [CCS Type: DT, Method: stepped-field]|147.3 Å² [M-2H+Na]-

See More (-)-Cystine Properties 

Hazard Identification

Classification of the substance or mixture

Not classified.

GHS label elements, including precautionary statements

Precautionary statement(s)
Pictogram(s)	No symbol.
Signal word	No signal word
Hazard statement(s)	none
Prevention	none
Response	none
Storage	none
Disposal	none

Other hazards which do not result in classification

no data available

Handling and Storage

Precautions for safe handling

Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.

Conditions for safe storage, including any incompatibilities

Store the container tightly closed in a dry, cool and well-ventilated place. Store apart from foodstuff containers or incompatible materials.

See More (-)-Cystine Safety Data Sheet 

Seller Information

Business Type:
Manufactory

Main Products:
BCAA,Ascorbic Acid (Vitamin C),Monk Fruit Extract,Acai Berry Extract,Taurine,AAKG

Location:
C-716, No. 1, North-South Street, Hexi District, Tianjin 300210, China.

Payment Terms:
TT against copy of documents,D/P,L/C,D/A,O/A,TT against B/L draft before shipment,100% TT in advance

Average lead Time:
25 days

Total Annual Revenue:
$10 million-$25 million

Total Employees:
11-50

Year of Establishment:
2006

Company Certificates
- FSSC22000
- FDA
Who We Are

Established in 2006, SNC | Good Fortune has been dedicated to the supply chain of global health industry, providing one-stop services for over 20 years.

Working as a professional and collaborative team, we sucessfully exported our products to 135 countries and regions. Our expertise includes everything from food ingredients, nutrition and sports supplement ingredients, and pharmaceutical raw materials, to OEM contract manufacturing, formulations, pharmaceutical machinery, packaging,and customized solutons.

Why Choose Us
1. 20 Years of Expertise in the International Trade across Health Industry.

2. Professional Team of Nearly 50 Members, 24/7 Available
1. Sales: 10 members, 20 years’ market experience
  
  Purchasing: 10 members, 12 years’ sourcing experience
  
  Logistics: 5 members, 15 years’ industry experience
3. Over 2 Million RMB Invested for Building Corporate Refined Operations, Management Systems and Standard Operation Procedures.

4. Nine Major Management Systems, Five Core Departments, and 980 SOPs for Standardized Service Delivery

9 Systems: Strategic System, Marketing System, Meeting System, Cultural System, Recruitment System, Training System, Performance System, Compensation System, Process System

5. FSSC 22000 Certified, with Six Certified Internal Auditors

6. Five-Tier Quality Control with a 20-Year Management System Covering 2,000+ Suppliers

7. Five-Class Supplier Rating System: more than 30 suppliers with over 15 years of partnership, and more than 50 suppliers with over 10 years of partnership

8. Global Procurement Solutions Serving Customers across 135 Countries.

9. 24/7 Real-Time Response:
1. Emails replied within 2 hours
2. Solutions provided within 24 hours
3. Comprehensive Traceability services delivered within 2 hours upon request
10. Full Data Traceability Guaranteed by In-House Servers and Dedicated Cloud Storage Since 2006

11. One-Stop Service: From needs analysis to concept realization

12. Full-Scope Support: From raw material sourcing to production implement

13. Customized Solutions: From ideas to product launch

14. Worry-Free Delivery: Door-to-door service, saving 30% your time

15. Growing Together: Long-term partnership and mutual success with clients

16. Market Insight: Helping clients stay ahead of the curve

17. Closed-Loop Service System Driven by Five Core Departments

18. Three Times per Year for Booth Set-ups at International Exhibitions and Four Times Overseas Client Visits Annually

19. Zero Contract Breach during past Two Decades + 30% Cost Savings through Centralized One-Stop Supply Solutions + Full Compliance and Zero Risk

Inquiry History

4 Inquiries

Country	Product	Purchase Quantity	Date Posted
India	L-CYSTINE	1.00 KG	Mar 31, 2026
India	L-CYSTINE	1.00 KG	Aug 7, 2025
Australia	L-Cystine	100.00 KG	Jun 1, 2025
India	L-CYSTEINE	50.00 KG	Mar 25, 2025

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L-Cystine

Product Description

Seller Information

Inquiry History

Classification of the substance or mixture

GHS label elements, including precautionary statements

Other hazards which do not result in classification

Precautions for safe handling

Conditions for safe storage, including any incompatibilities

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