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L-Cystine dihydrochloride

L-Cystine dihydrochloride structure

CAS No.: 30925-07-6

Chemical Name:: L-Cystine dihydrochloride

Synonyms: L-(-)-CYSTINE DIHYDROCHLORIDE;L-CYSTINE DIHYDROCHLORIDE SALT;Cystine2HCl,L-;(H-CYS-OH)2 HCL;(H-CYS-OH)2 2HCL;Einecs 250-391-9;(H-L-Cys-OH)2·2HCl;-Cystine dihydrochL;L-Cystine HCl Monohydrate;L-Cystine dihydrochloride

CBNumber:: CB9147199

Molecular Formula:: C6H13ClN2O4S2

Molecular Weight:: 276.75

MDL Number:: MFCD00070399

MOL File:: 30925-07-6.mol

MSDS File:: SDS

TDS File:: TDS

Last updated:2026-09-12 18:56:01

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L-Cystine dihydrochloride Properties

Melting point	228-232℃
alpha	[α]D20 -165～-175° (c=1, dil. HCl)
Density	1.518[at 20℃]
vapor pressure	0Pa at 20℃
storage temp.	Keep in dark place,Inert atmosphere,Room temperature
solubility	0.5 M HCl: 50 mg/mL
form	Powder
color	White to Pale Yellow
Odor	odorless
biological source	synthetic
optical activity	[α]20/D -174 to -164 °, c =2 in 1 M HCl
Water Solubility	Soluble in hydrochloric acid. (0.5 M HCl: 50 mg/mL) Soluble in water.
InChI	InChI=1/C6H12N2O4S2.ClH/c7-3(5(9)10)1-13-14-2-4(8)6(11)12;/h3-4H,1-2,7-8H2,(H,9,10)(H,11,12);1H/t3-,4-;/s3
InChIKey	IOCJWNPYGRVHLN-QYDODFSFNA-N
SMILES	[C@@H](N)(C(=O)O)CSSC[C@H](N)C(=O)O.Cl \|&1:0,9,r\|
LogP	-5.08 at 25℃
CAS DataBase Reference	30925-07-6(CAS DataBase Reference)
FDA UNII	WFN1A47EIG
UNSPSC Code	12352209
NACRES	NA.26

SAFETY

Risk and Safety Statements

Symbol(GHS)	GHS05
Signal word	Danger
Hazard statements	H314
Precautionary statements	P260-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338-P363
PPE	Eyeshields, Gloves, type N95 (US)
Hazard Codes	Xi
Risk Statements	36/37/38
Safety Statements	26-36
WGK Germany	3
TSCA	Yes
HS Code	29309013
Storage Class	8A - Combustible corrosive hazardous materials
Hazard Classifications	Eye Dam. 1 Skin Corr. 1B
REACH Registrations	Active

L-Cystine dihydrochloride price More Price(58)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
Sigma-Aldrich	RES1513C-A7	L-Cystine dihydrochloride, non-animal derived	30925-07-6	1kg	$2260	2026-04-30	Buy
Sigma-Aldrich	RES1513C-A7	L-Cystine dihydrochloride, non-animal derived PharmaGrade, Manufactured under appropriate controls for use as a raw material in pharma or biopharmaceutical production., suitable for cell culture	30925-07-6	1pkg	$9060	2026-04-30	Buy
Sigma-Aldrich	C2526	L-Cystine dihydrochloride ≥98% (TLC)	30925-07-6	100g	$260	2026-04-30	Buy
Sigma-Aldrich	C2526	L-Cystine dihydrochloride ≥98% (TLC)	30925-07-6	1kg	$1630	2026-04-30	Buy
Sigma-Aldrich	RES1513C-A7	L-Cystine dihydrochloride, non-animal derived	30925-07-6	100g	$238	2024-03-01	Buy

Product number	Packaging	Price	Buy
RES1513C-A7	1kg	$2260	Buy
RES1513C-A7	1pkg	$9060	Buy
C2526	100g	$260	Buy
C2526	1kg	$1630	Buy
RES1513C-A7	100g	$238	Buy

L-Cystine dihydrochloride Chemical Properties, Uses, Production

Chemical Properties

Solid

Uses

L-Cystine is a sulfur containing non-essential amino acid. It is used as a cell culture media component and raw material in the commercial biomanufacture of therapeutic recombinant proteins and monoclonal antibodies. L-Cystine dihydrochloride is a modified version of L-Cystine with improved solubility.

Flammability and Explosibility

Not classified

Biochem/physiol Actions

L-Cystine is a natural proteinogenic amino acid sulfide dimer of L-cysteine. L-cystine is used as a cell culture supplement. L-cystine is also used to characterize and identify specific amino acid transport systems in cells such as system system Xc(─) .

in vivo

L-Cystine dihydrochloride (280 mg/kg, p.o., 11 days) administrated with L-theanine (HY-15121) enhances antigen-specific IgG production partly through augmentation of glutathione (GSH) levels and T helper 2 (Th2)-mediated responses in mice^[2]. L-Cystine dihydrochloride (200 mg/kg, p.o., 11 days) administrated with L-theanine (HY-15121) (80 mg/kg, p.o., 11 days) significantly decreases the serum IL-10/IFN-γ ratio 6 hours after DNP-KLH antigenic stimulation, but increases the serum IL-10/IFN-γ ratio 24 hours after DNP-KLH antigenic stimulation in mice^[2].

Animal Model:	Nine-week-old female BALB/c mice^[2]
Dosage:	140, 280 and 560 mg/kg
Administration:	p.o. administration for 11 days
Result:	Increased IgG and IgM antibody production administrated with L-theanine (HY-15121) after DNP-dextran and DNP-KLH antigenic stimulation in mice.

L-Cystine dihydrochloride Preparation Products And Raw materials

Raw materials

Preparation Products

L-Cystine dihydrochloride Suppliers

Global Suppliers ( 268)

Supplier	Tel	Email	Country	ProdList	Advantage
J & K SCIENTIFIC LTD.	18210857532 18210857532	jkinfo@jkchemical.com	China	96815	76
TCI (Shanghai) Development Co., Ltd.	021-67121386	Sales-CN@TCIchemicals.com	China	24512	81
JinYan Chemicals(ShangHai) Co.,Ltd.	13817811078	sales@jingyan-chemical.com	China	9963	60
Adamas Reagent, Ltd.	400-6009262 15618770481	yhx@titansci.com	China	14098	59
Shanghai Hanhong Scientific Co.,Ltd.	021-54306202 13764082696	info@hanhongsci.com	China	42917	64
Sinopharm Chemical Reagent Co,Ltd.	86-21-63210123	sj_scrc@sinopharm.com	China	9791	79
Maya High Purity Chemicals	+86 (573) 82222445 (0)18006601000 452520369	sales@maya-r.com	China	11693	57
Spectrum Chemical Manufacturing Corp.	021-021-021-67601398-809-809-809 15221380277	marketing_china@spectrumchemical.com	China	9643	60
Dalian Meilun Biotech Co., Ltd.	0411-62910999 13889544652	sales@meilune.com	China	4765	58
Beijing HuaMeiHuLiBiological Chemical	010-56205725	waley188@sohu.com	China	12323	58

Supplier	Advantage
J & K SCIENTIFIC LTD.	76
TCI (Shanghai) Development Co., Ltd.	81
JinYan Chemicals(ShangHai) Co.,Ltd.	60
Adamas Reagent, Ltd.	59
Shanghai Hanhong Scientific Co.,Ltd.	64
Sinopharm Chemical Reagent Co,Ltd.	79
Maya High Purity Chemicals	57
Spectrum Chemical Manufacturing Corp.	60
Dalian Meilun Biotech Co., Ltd.	58
Beijing HuaMeiHuLiBiological Chemical	58

View Latest Price from L-Cystine dihydrochloride manufacturers

Update time	Product	Price	Min. Order	Purity	Supply Ability	Manufacturer
2026-09-18	L-Alaninamide hydrochloride 30925-07-6	$800.00-999.00	1kg	99%	5000	HEBEI SHENGSUAN CHEMICAL INDUSTRY CO.,LTD
2026-05-28	L-CYSTINE DIHYDROCHLORIDE 30925-07-6	$9.00	1KG	99.9	1 ton	Hebei Chuanghai Biotechnology Co,.LTD
2023-07-22	L-Cystine dihydrochloride 30925-07-6		1KG	99%	5T/MOMTH	Chengdu Baishixing Science and Technology Industry Co.,Ltd

L-Alaninamide hydrochloride
30925-07-6
$800.00-999.00
99%
HEBEI SHENGSUAN CHEMICAL INDUSTRY CO.,LTD

L-CYSTINE DIHYDROCHLORIDE
30925-07-6
$9.00
99.9
Hebei Chuanghai Biotechnology Co,.LTD

L-Cystine dihydrochloride
30925-07-6
$0.00
99%
Chengdu Baishixing Science and Technology Industry Co.,Ltd

L-Cystine dihydrochloride Spectrum

L-CYSTINE DIHYDROCHLORIDE(30925-07-6)MS L-CYSTINE DIHYDROCHLORIDE(30925-07-6)¹HNMR L-CYSTINE DIHYDROCHLORIDE(30925-07-6)¹³CNMR L-CYSTINE DIHYDROCHLORIDE(30925-07-6)IR1 L-CYSTINE DIHYDROCHLORIDE(30925-07-6)IR2

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(H-CYS-OH)2 2HCL (H-CYS-OH)2 HCL L-(-)-CYSTINE DIHYDROCHLORIDE L-Cystine HCl Monohydrate L-Cystine dihydrochloride, non-animal source, cell culture tested Cystine2HCl,L- L-CYSTINE DIHYDROCHLORIDE SALT L-CYSTINE DIHYDROCHLORIDE SYNTHETICALLY DERIVED Cystine Dihydrochloride, L- Einecs 250-391-9 2-aMino-3-[(2R)-2-aMino-3-hydroxy-3-oxopropyl]disulfanylpropanoic acid dihydrochloride L-CYSTINE DIHYDROCHLORIDE SUPPLIERS & MANUFACTURERS L-CYSTINE DIHYDROCHLORIDE, NON-ANIMA (H-L-Cys-OH)2·2HCl L-Cystine dihydrochlorideNon-animal source, ≥ 99% (Assay: anhydrous basis) L-Cystine dihydrochloride, non-animal derived L-(-)-Cystine Dihydrochloride > CultureSure L-Cystine Dihydrochloride, Animal-derived-free -Cystine dihydrochL L-CYSTINE DIHYDROCHLORIDE USP/EP/BP TIANFU-CHEM - L-CYSTINE DIHYDROCHLORIDE (2R,2'R)-3,3'-Disulfanediylbis(2-aminopropanoic acid) dihydrochloride L-Cystine, dihydrochloride (9CI) L-Cysteine dihydrochloride L-Cystine dihydrochloride L-Cystine dihydrochloride 30925-07-6 135058-63-7 C6H12N2O4S22ClH amino Biochemicals Found in Plants Nutrition Research Amino AcidsNutrition Research Amino Acids and Vitamins Reagents and Supplements Amino acids