Molecular Formula: C5H11NO2S
CAS: 63-68-3
Properties: achromaticity or white thin lamellae or white crystalline powder. Special smell. Odorless, slightly sweet. Melting point is 280-281℃. Unstability in strong acid and cause demethylation. Soluble in water(5.6g/100mL, 30℃), warm dilute ethanol, alkali and dilute inorganic acid solution. Difficult to soluble in ethanol, insoluble in ether. Essential amino acid.
Usage: nutritional supplements. Its effect was equal to DL-Methionine
Application: widely used in seasoning and health food.
Quality Standard: USP28
|
Items |
Standard |
|
appearance |
white thin lamellae |
|
Content(%) |
98.5―101.5 |
|
heavy metal(ppm) |
15 max |
|
acidity(pH value) |
5.6―6.5 |
|
Arsenic(%) |
1.5 ppm |
|
drying shrinkage(%) |
0.3 max |
|
ignition residue(%) |
0.1 max |
|
specific rotation |
+21.9°―+24.1° |
|
Chlorid(chlorine, ppm) |
0.05 max |
|
Sulfate(%) |
0.03 max |
|
Iron(ppm) |
30 max |
|
volatile organic compounds |
negative |
Packaging: 25KG / box
Transportation: avoid sun and rain, be transported as general chemicals but with no toxic, hazard materials.
Storage: stored in dry clean dark environment, and not be mixed with toxic substances to avoid contamination. Shelf life: two years |
