Phytagel is an agar substitute produced from a bacterial substrate composed of glucuronic acid葡萄糖醛酸, rhamnose鼠李糖and glucose. It produces a clear, colorless, high-strength gel, which aids in detection of microbial contamination. Phytagel provides an economical alternative to agar as a gelling agent. Use Phytagel at a concentration of 1.5-2.5 g/L. To prevent clumping, Phytagel should be added to rapidly stirring culture medium which is at room temperature. Typical working concentration: 1.5-2.5 g/L in plant tissue culture media; up to 10 g/L in microbiological media. Phytagel^™ requires the presence of cations (especially divalent) for gelling to occur. Concentrations of calcium and magnesium contained in most plant tissue culture media are typically sufficient for gelation. Low-salt media formulations, especially those used in microbiological applications, may require supplementation with additional calcium or magnesium salts (e.g., CaCl₂ or MgSO₄) or higher concentrations of Phytagel. An agar substitute produced from a bacterial fermentation composed of glucuronic acid, rhamnose and glucose. It produces a clear, colorless, high strength gel which aids in detection of microbial contamination。