Chemical Properties of Cystine (CAS 56-89-3)

InChI

InChI=1S/C6H12N2O4S2/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)/t3-,4-/m1/s1

InChI Key

LEVWYRKDKASIDU-QWWZWVQMSA-N

Formula

C6H12N2O4S2

SMILES

NC(CSSCC(N)C(=O)O)C(=O)O

Molecular Weight¹

240.30

CAS

56-89-3

Other Names

• (-)-Cystine
• (R-(R*,R*))-3,3'-Dithiobis(2-aminopropanoic acid)
• 3,3'-Dithiobis(2-aminopropanoic acid)
• 3,3'-Dithiobis(2-aminopropionic acid)
• 3,3'-Dithiodialanine
• 3,3'-dithiobis-L-alanine
• Alanine, 3,3'-dithiobis-
• Alanine, 3,3'-dithiodi-
• Bis(«beta»-amino-«beta»-carboxyethyl) disulfide
• Cysteine disulfide
• Cystin
• Cystine acid
• Cystine, L-
• Dicysteine
• L-3,3'-dithiodialanine
• L-Alanine, 3,3'-dithiobis-
• L-Cysteine disulfide
• L-Cystin
• L-cystine
• NSC 13203
• Oxidized L-cysteine
• Propanoic acid, 3,3'-dithiobis(2-amino-, (R-(R*,R*))-
• «beta»,«beta»'-Diamino-«beta»,«beta»'-dicarboxydiethyl disulfide
• «beta»,«beta»'-Dithiobisalanine
• «beta»,«beta»'-Dithiodialanine

• Δ_cH°_solid : Standard solid enthalpy of combustion (kJ/mol).
• C_p,gas : Ideal gas heat capacity (J/mol×K).
• C_p,solid : Solid phase heat capacity (J/mol×K).
• Δ_fG° : Standard Gibbs free energy of formation (kJ/mol).
• Δ_fH°_gas : Enthalpy of formation at standard conditions (kJ/mol).
• Δ_fH°_solid : Solid phase enthalpy of formation at standard conditions (kJ/mol).
• Δ_fusH° : Enthalpy of fusion at standard conditions (kJ/mol).
• Δ_vapH° : Enthalpy of vaporization at standard conditions (kJ/mol).
• log₁₀WS : Log10 of Water solubility in mol/l.
• logP_oct/wat : Octanol/Water partition coefficient.
• McVol : McGowan's characteristic volume (ml/mol).
• P_c : Critical Pressure (kPa).
• S°_{solid,1 bar} : Solid phase molar entropy at standard conditions (J/mol×K).
• T_boil : Normal Boiling Point Temperature (K).
• T_c : Critical Temperature (K).
• T_fus : Normal melting (fusion) point (K).
• V_c : Critical Volume (m³/kmol).
• ¹: Molecular weight from the IUPAC atomic weights tables.

Physical Properties

Property	Value	Unit	Source
ΔcH°solid	[-4248.00; -4158.20]	kJ/mol
ΔcH°solid	-4248.00 ± 3.80	kJ/mol	NIST
ΔcH°solid	-4230.00 ± 3.80	kJ/mol	NIST
ΔcH°solid	-4201.20	kJ/mol	NIST
ΔcH°solid	-4158.20	kJ/mol	NIST
ΔfG°	-337.58	kJ/mol	Joback Calculated Property
ΔfH°gas	-556.03	kJ/mol	Joback Calculated Property
ΔfH°solid	-1105.00	kJ/mol	NIST
ΔfusH°	34.28	kJ/mol	Joback Calculated Property
ΔvapH°	109.94	kJ/mol	Joback Calculated Property
log10WS	-0.38		Crippen Calculated Property
logPoct/wat	-0.808		Crippen Calculated Property
McVol	162.940	ml/mol	McGowan Calculated Property
Pc	5739.21	kPa	Joback Calculated Property
S°solid,1 bar	[280.58; 286.60]	J/mol×K
S°solid,1 bar	280.58	J/mol×K	NIST
S°solid,1 bar	286.60	J/mol×K	NIST
Tboil	910.52	K	Joback Calculated Property
Tc	1133.18	K	Joback Calculated Property
Tfus	584.20	K	Joback Calculated Property
Vc	0.576	m3/kmol	Joback Calculated Property

Temperature Dependent Properties

Property	Value	Unit	Temperature (K)	Source
Cp,gas	[458.08; 481.31]	J/mol×K	[910.52; 1133.18]
Cp,gas	458.08	J/mol×K	910.52	Joback Calculated Property
Cp,gas	463.72	J/mol×K	947.63	Joback Calculated Property
Cp,gas	468.63	J/mol×K	984.74	Joback Calculated Property
Cp,gas	472.85	J/mol×K	1021.85	Joback Calculated Property
Cp,gas	476.36	J/mol×K	1058.96	Joback Calculated Property
Cp,gas	479.17	J/mol×K	1096.07	Joback Calculated Property
Cp,gas	481.31	J/mol×K	1133.18	Joback Calculated Property
Cp,solid	[261.92; 268.60]	J/mol×K	[297.30; 298.15]
Cp,solid	268.60	J/mol×K	297.30	NIST
Cp,solid	261.92	J/mol×K	298.15	NIST

Similar Compounds

Find more compounds similar to Cystine.

Mixtures

• Cystine + Water
• Ethanaminium, N,N,N-triethyl-, iodide + Cystine + Water
• Tetramethylammonium chloride + Cystine + Water
• sodium chloride + Cystine + Water
• Sodium perchlorate + Cystine + Water

Sources

• Crippen Method
• Crippen Method
• Solubility and Activity Coefficients of Acidic and Basic Nonelectrolytes in Aqueous Salt Solutions. 1. Solubility and Activity Coefficients of o-Phthalic Acid and L-Cystine in NaCl(aq), (CH3)4NCl(aq), and (C2H5)4NI(aq) at Different Ionic Strengths and at t ) 25 deg C
• Solubility and Acidic Constants of L-Cystine in NaClO4 Aqueous Solutions at 25 deg C
• Joback Method
• McGowan Method
• NIST Webbook

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