L-Cystine | CAS 56-89-3 | USP Amino Acid Raw Material - - PREMIUM INGREDIENT

L-Cystine Powder, CAS 56-89-3, USP Grade Amino Acid, Available in Animal Source & Fermented Non-animal Versions for Supplements

Categories:

Amino Acids

CAS No:

56-89-3

3 / 1

Description

Basic Info

Characteristics

Hazard Identification

Handling and Storage

Basic Information

Item	Specification
Product Name	L-Cystine
CAS No.	56-89-3
Molecular Formula	C₆H₁₂N₂O₄S₂
Molecular Weight	240.30
Appearance	White crystalline powder
Purity	≥98.5%
Solubility	Slightly soluble in water, insoluble in ethanol; soluble in dilute mineral acids and alkaline solutions
Source	duck feather or glucose
Implementation Standard	USP / CP / BP / EP/ AJI
Certifications	ISO9001, ISO22000, HALAL, KOSHER, HACCP

Product Overview

L-Cystine (Cas No.: 56-89-3) is a sulfur-containing amino acid, formed by two L-cysteine molecules linked through a disulfide bond.

It appears as white crystalline powder with low water solubility. Globally, the pharmaceutical & healthcare field is the highest value market for L-Cystine, followed by functional food/nutraceuticals and cosmetic raw materials. It is widely used as a key intermediate for respiratory pharmaceutical formulations, raw material for hair & nail health dietary supplements, keratin precursor for hair care products, and biochemical culture medium component.

Two sources are available: duck feather or glucose, . Customers can select the suitable variant according to dietary, religious and formulation requirements.

Key Characteristics

1.White crystalline powder, low solubility in water

2.Contains disulfide bond, acts as precursor for keratin synthesis

3.Chemically stable under recommended storage conditions

4.Suitable for nutraceutical, cosmetic and pharmaceutical dry formulations

Main Functions

1.Keratin synthesis precursor: Provides sulfur source to synthesize keratin, the structural protein of hair, nails and skin.

2.Antioxidant & glutathione support: Supports glutathione production, helps reduce oxidative stress in tissues.

3.Nutritional amino acid fortification: Supplies essential sulfur-containing amino acid for nutritional supplement formulations.

4.Hair & nail structural support: Improves hair strength and nail toughness in cosmetic and nutraceutical products.

5.Pharmaceutical intermediate: Raw material for mucolytic, respiratory health and detoxification related pharmaceutical synthesis.

6.Biochemical raw material: Component of cell and microbial culture media for laboratory and biotech production.

Application

1.Pharmaceutical industry: Pharmaceutical intermediate for respiratory mucolytic agents, expectorants and detoxification formulations; raw material for amino acid injection and oral medicinal nutrition products.

2.Dietary supplements & functional food: Hair, nail & skin health supplements, sports nutrition formulas, amino acid fortified functional food and nutritional powder.

3.Cosmetics & personal care: Raw material for hair repair shampoo, hair treatment, nail care and skin barrier repair formulations.

4.Biochemical & laboratory use: Component of cell culture medium and microbial culture medium for biotech research and production.

Packaging and Storage

Item	Detail
Packaging	25 kg fiber drum
Storage Condition	Store in cool, dry and well-ventilated area
Handling	Keep container tightly sealed, protected from moisture and direct sunlight
Shelf Life	24 months when properly stored

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

PSA:	177.24000	XLogP3:	-6.3
Appearance:	DryPowder	Density:	3″>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:	1
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]-

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

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.