USD $8.20-8.80 / Kilogram
USD $1.00-10.00 / Kilogram
l-theanine powder food grade n-gamma-ethyl-l-glutamine
l-theanine
l-theanine was found in tea leaves and certain species of fungi, l-theanine is an amino acid. unlike most amino acids, which build proteins for muscles, theanine primarily benefits cognitive health, promoting relaxation, healthy sleep, and focus.
test items |
standard |
appearance |
white powder |
assay (hplc) |
98.0 - 102.0% |
specific rotation (a)d20 (c=1 , h2o ) |
+7.7°+8.5° |
solubility (1.0g/20ml h2o) |
clear colorless |
chloride (cl) |
≤ 0.02% |
loss on drying |
≤1.0% |
residue on ignition |
≤0.2% |
ph |
5.0 - 6.0 |
heavy metals (as pb) |
≤10 ppm |
arsenic ( as as) |
≤1 ppm |
total plate count |
< 1000cfu/g |
yeast and mold |
<100cfu/g |
salmonella |
absent |
e.coli |
absent |
application of l-theanine
l-theanine storage