Tetrodotoxin (TTX) reversibly blocks excitable sodium channels and has been a widely used tool for studies of excitable membranes of nerve, skeletal muscle and cardiac muscle cells. Biotium offers high quality tetrodotoxin with or without citrate, at a competitive price. Tetrodotoxin, citrate-free can be dissolved in slightly acidic buffer. Tetrodotoxin, with citrate can be dissolved in water to obtain TTX in pH 4.8 citrate buffer.Properties: C11H17N3O8; MW: 319.28; [4368-28-9]