Kappa carrageenan isared seaweed extract taken specifically from Kappaphycus alvarezii. Like other types of carrageenan it is used as a gelling, thickening and stabilizing agent. When mixed with water kappa carrageenan creates a strong and firm solid gel that may be brittle in texture. 100% PureKappa Carrageenan (e407) for use as a gelling agent in molecular gastronomy. More Info.