... 5%Specific rotation (a) 20/D (C=10 in 2N HCL)+31.5 to +32.5°State of solution (Transmittance) Clear ... R & D, production, sales and technical services of L-Theanine, L-Pyroglutamic acid, L-Glutamic acid etc. Our plant is designed, built and ... gradually establishing brand advantage.Leading TechnologyWe specialized in production of L-Theanine for many years, with competitive advantages in technology. ...