| Identification | More | [Name]
S-Methyl-L-cysteine | [CAS]
1187-84-4 | [Synonyms]
H-CYS(ME)-OH
H-L-CYS(ME)-OH
(R)-2-AMINO-3-(METHYLMERCAPTO)PROPIONIC ACID
S-METHYL-CYSTEINE
S-METHYL-L-CYSTEINE
Alanine, 3-(methylthio)-, L-
L-CH3SCH2CH(NH2)COOH
L-Cysteine, S-methyl-
Methylcysteine
SMC
DL-S-Methyl-cysteine
S-Methyl-L-cysteine, 99+%
S-Methyl-L-Cysteine(SMC)
S-Methyl-L-Cys-OH
S-METHYL-L-CYSTEINE/ H-CYS(ME)-OH
(2R)-2-Amino-3-methylsulfanylpropanoic acid | [EINECS(EC#)]
214-701-6 | [Molecular Formula]
C4H9NO2S | [MDL Number]
MFCD00002612 | [Molecular Weight]
135.18 | [MOL File]
1187-84-4.mol |
| Chemical Properties | Back Directory | [Appearance]
white to light beige fine crystalline powder | [Melting point ]
~240 °C (dec.) | [alpha ]
-29.5 º (c=1,water) | [Boiling point ]
300.3±37.0 °C(Predicted) | [density ]
1.149 (estimate) | [refractive index ]
-30 ° (C=2, H2O) | [storage temp. ]
−20°C
| [solubility ]
Aqueous Acid (Slightly, Sonicated), Aqueous Base (Sparingly, Sonicated) | [form ]
Solid | [pka]
pK1:8.97 (25°C) | [color ]
White to Off-White | [BRN ]
1721675 | [LogP]
0.380 (est) | [CAS DataBase Reference]
1187-84-4(CAS DataBase Reference) | [NIST Chemistry Reference]
s-Methyl-L-cysteine(1187-84-4) |
| Safety Data | Back Directory | [Hazard Codes ]
Xn | [Risk Statements ]
R22:Harmful if swallowed. | [Safety Statements ]
S22:Do not breathe dust .
S24/25:Avoid contact with skin and eyes .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice . | [WGK Germany ]
3
| [HS Code ]
29309090 |
| Hazard Information | Back Directory | [Chemical Properties]
white to light beige fine crystalline powder | [Uses]
S-Methyl-L-cysteine is a substrate in the catalytic antioxidant system mediated by methionine sulfoxide reductase A (MSRA). It has been studied as a theurapeutic for neurodegenerative diseases including Parkinson′s. | [Definition]
ChEBI: A cysteine derivative that is L-cysteine in which the hydrogen attached to the sulfur is replaced by a methyl group. | [Purification Methods]
Likely impurities are cysteine and S-methyl-dl-cysteine. Crystallise it from H2O by adding 4volumes of EtOH. It also crystallises from MeOH with m 234-236o(dec), but after sublimation i t has m 267-270o and [] 27D -31.6o (c 1, H2O). [Rinderknecht et al. Helv Chim Acta 41 1, 10 1958, Theodoropoulos Acta Chem Scand 13 383 1959, Greenstein & Winitz The Chemistry of the Amino Acids J. Wiley, Vol 3 p 1904 1961, Beilstein 4 IV 3145.] |
|
|