Carrageenan only the lambda form (and the sodium salts of the other two) are soluble. When used in food products, carrageenan has the EU additive E numbers E407 or E407a when present as "processed eucheuma seaweed". Technically carrageenan is considered a dietary fibre. In parts of Scotland and Ireland, where it is known by a variety of local and native names, "Chondrus crispus" is boiled in milk and strained, before sugar and other flavourings such as vanilla, cinnamon, brandy, or whisky are added. The end-product is a kind of jelly similar to panna cotta, tapioca, or blancmange. Although carrageenans were introduced
Tyrian purple the purple". Some speculate that the dye extracted from the "Bolinus brandaris" is known as () in Biblical Hebrew. Another dye extracted from a related sea snail, "Hexaplex trunculus", produced a blue colour which could be the one known as (), used in garments worn for ritual purposes. The dye substance is a mucous secretion from the hypobranchial gland of one of several species of medium-sized predatory sea snails that are found in the eastern Mediterranean Sea. These are the marine gastropods "Bolinus brandaris" the spiny dyemurex, (originally known as "Murex brandaris" Linnaeus, 1758), the banded dye-murex "Hexaplex trunculus", the