L-tyrosine is our advantaged product. We are the prefessional manufactory of amino acid in China. Guarantee high quality, competive price and reliable service. H-Tyr-OH Place of Origin: Sichuan China CAS No.: 60-18-4 Standard: AJI92/ USP26 Purity: min 99% Supply Ability: 5000 kilogram per month Package: 25kg/ bag or drum Delivery Time: winhin 5 days L-tyrosine, White crystals or crystaline powder, cool, dry, dark in closed containers; recommended limit 2 years.