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)

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 Information

Hazard Codes 

Xn

Risk Statements 

22

Safety Statements 

22-24/25-36/37/39-26

WGK Germany 

3

HS Code 

29309090

MSDS

• Language:English Provider:(R)-2-Amino-3-(methylmercapto)propionic acid
• Language:English Provider:SigmaAldrich
• Language:English Provider:ACROS

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(1187-84-4)Related Product Information

• L-Cysteine
• 6-Aminocaproic acid
• Propionic acid
• METSULFURON METHYL
• Glycine
• ALTRENOGEST
• Kresoxim-methyl
• Thiophanate-methyl
• N-Acetyl-L-cysteine
• DL-Homocysteine
• Tris(hydroxymethyl)aminomethane
• Methyl salicylate
• Tribenuron methyl
• Methyl
• Methyl bromide
• S-Trityl-L-cysteine
• S-Carboxymethyl-L-cysteine
• L-CYSTEINE HCL ANHYDROUS