High purity L-Cysteine with best price and good quality CAS NO.52-90-4

product name:

l-cysteine

synonyms:

(r)-2-amino-3-mercaptopropanoic acid;3-mercapto-l-alanin;alpha-amino-beta-mercaptopropionicacid;alpha-amino-beta-thiolpropionic acid;alpha-amino-beta-thiolpropionicacid;cystein;half-cysteine;l-alanine, 3-mercapto-

cas:

52-90-4

mf:

c3h7no2s

mw:

121.16

product categories:

api intermediates;cysteine [cys, c];amino acids;amino acids and derivatives;alpha-amino acids;antioxidant;biochemistry;nutritional supplements;l-amino acids;amino acids;amino

mol file:

52-90-4.mol

chemical properties

melting point

220 °c (dec.)(lit.)

boiling point

293.9 °c at 760 mmhg

alpha

8.75 º (c=12, 2n hcl)

density

1.334 g/cm3

vapor pressure

0.000411 mmhg at 25°c

refractive index

8.8 ° (c=8, 1mol/l hcl)

flashing point

131.5°c

storage temp.

store at rt.

solubility

soluble in water, ethanol, not soluble in ethanol, propanol, ethyl acetate, stupid, carbon disulfide, carbon tetrachloride.

water solubility

280 g/l (25 ºc)

sensitive

air sensitive

stability

stability stable, but may be air sensitive. incompatible with oxidizing agents, bases.

usage and synthesis

chemical properties

white crystalline powder, imine tastes, in neutral or slightly alkaline solution easy oxidation by air into cystine, acidic environment is stable.

usage

l-cysteine is a non-essential amino acid that can be synthesized by the human body under normal physiological conditions if a sufficient quantity of methionine is available. l-cysteine is commonly use d as a precursor in the food and pharmaceutical industries. l-cysteine is used as a processing aid for baking, as an additive in cigarettes, as well as in the preparation of meat flavours.