Definitions for orcein
or·cein

WiktionaryRate this definition:0.0 / 0 votes

1. orceinnoun

   a dye, related to litmus, that is extracted from the lichen Rocella tinctoria; used as a microscopic stain and as a food colouring

WikipediaRate this definition:0.0 / 0 votes

1. Orcein

   Orcein, also archil, orchil, lacmus and C.I. Natural Red 28, are names for dyes extracted from several species of lichen, commonly known as "orchella weeds", found in various parts of the world. A major source is the archil lichen, Roccella tinctoria. Orcinol is extracted from such lichens. It is then converted to orcein by ammonia and air. In traditional dye-making methods, urine was used as the ammonia source. If the conversion is carried out in the presence of potassium carbonate, calcium hydroxide, and calcium sulfate (in the form of potash, lime, and gypsum in traditional dye-making methods), the result is litmus, a more complex molecule. The manufacture was described by Cocq in 1812 and in the UK in 1874. Edmund Roberts noted orchilla as a principal export of the Cape Verde islands, superior to the same kind of "moss" found in Italy or the Canary Islands, that in 1832 was yielding an annual revenue of $200,000.: pp.14, 15  Commercial archil is either a powder (called cudbear) or a paste. It is red in acidic pH and blue in alkaline pH.

WikidataRate this definition:0.0 / 0 votes

1. Orcein

   Orcein, also archil, orchil, lacmus and C.I. Natural Red 28, are names for dyes extracted from several species of lichen, commonly known as "orchella weeds", found in various parts of the world. A major source is the archil lichen, Roccella tinctoria. Orcinol is extracted from such lichens. It is then converted to orcein by ammonia and air. In traditional dye-making methods, urine was used as the ammonia source. If the conversion is carried out in the presence of potassium carbonate, calcium hydroxide, and calcium sulfate, the result is litmus, a more complex molecule. The manufacture was described by Cocq in 1812 and in the UK in 1874. Roberts noted orchilla as a principal export of the Cape Verde islands, superior to the same kind of moss found in Italy or the Canaries, that in 1832 was yielding an annual revenue of $200,000. Commercial archil is either a powder or a paste. It is red in acidic pH and blue in alkaline pH. Orcein is approved as a food dye, with E number E121. Its CAS number is [1400-62-0]. Its chemical formula is C28H24N2O7. It forms dark brown crystals. It is a mixture of phenoxazone derivates - hydroxyorceins, aminoorceins, and aminoorceinimines.

Anagrams for orcein »

1. recoin

2. coiner

3. cerion

4. neroic

How to pronounce orcein?

1. Alex

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   David

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   Mark

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   Daniel

   British

   Libby

   British

   Mia

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   Karen

   Australian

   Hayley

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   Neerja

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   Oliver

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   Fred

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   Tessa

   South African

How to say orcein in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of orcein in Chaldean Numerology is: 5

2. Pythagorean Numerology

   The numerical value of orcein in Pythagorean Numerology is: 1

References

1. ^ Wiktionary
   https://en.wiktionary.org/wiki/Orcein
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Orcein
3. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=orcein