USD $1.00-10.00 / Kilogram
USD $90.00-120.00 / Kilogram
USD $3.00-10.00 / Kilogram
USD $1.00-10.00 / Kilogram
USD $3.00-10.00 / Kilogram
USD $3.00-10.00 / Kilogram
USD $6.00-9.00 / Gram
USD $3.00-10.00 / Kilogram
USD $5.00-40.00 / Kilogram
sichuan tongsheng is the most strongest manufacturer and exporter of amino acids and their derivatives in china, we have the best quality and price. guarantee high quality, competive price and reliable service.
we fully compliance with iso9001:2008, production and quality management following gmp standards, production plant constructed in accordance with gmp standards. quality control conforms to the standards of pharmaceutical-food cp grade and japan ajinomoto aji, american usp and reagent grade br.
we have kosher and hala certificate.
product name: l-theanine
cas#: 3081-61-6
molecular formula: c7h14n2o3
molecular weight: 174.2
specification:
item |
standard |
appearance |
white crystalline powder |
specific rotation(a)d20 (c=1 , h2o ) |
+7.7° to +8.5° |
solubility (1.0g/20ml h2o) |
clear colorless |
melting point (℃) |
211-216 ℃ |
chloride(c1) |
not more than 0.02% |
iron(fe) |
not more than 10ppm |
heavy metals( pb ) |
not more than 10ppm |
arsenic(as2o3 ) |
not more than 4ppm |
loss on drying( 100 ℃ 3h) |
not more than 0.50% |
residue on ignition |
not more than 0.2% |
assay |
98.0-102.0% |
ph |
5.0~6.0 |
application:
used as pharmaceutical intermediates, biochemical reagents and raw materials for cosmetics.
laboratory picture: