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| | S-Methyl-L-cysteine Basic information |
| | S-Methyl-L-cysteine Chemical Properties |
| 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. | Keep in dark place,Sealed in dry,Store in freezer, under -20°C | | solubility | Aqueous Acid (Slightly, Sonicated), Aqueous Base (Sparingly, Sonicated) | | pka | pK1:8.97 (25°C) | | form | Solid | | 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) |
| | S-Methyl-L-cysteine Usage And Synthesis |
| 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.] |
| | S-Methyl-L-cysteine Preparation Products And Raw materials |
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