Difference between revisions of "Carrageenan"
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== Description == | == Description == | ||
| − | A water-soluble polysaccharide extracted from several species of red algae such as ''Chondrus crispus''. Carrageenan forms thermo-reversible gels that can change from gel to liquid with changing temperatures. It is used as an emulsifier and stabilizer in food products. In the mid 19th century, carrageenan was used as a size for marbled papers. | + | A water-soluble polysaccharide extracted from several species of red algae such as ''Chondrus crispus''. Carrageenan forms thermo-reversible gels that can change from gel to liquid with changing temperatures. It is used as an emulsifier and stabilizer in food products. In the mid 19th century, carrageenan was used as a size for marbled papers. It was also used as an adhesive in traditional Chinese painting mounting. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
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* Most stable at pH 9. | * Most stable at pH 9. | ||
* CAS = 9000-07-1 | * CAS = 9000-07-1 | ||
| + | |||
| + | ==Working Properties== | ||
| + | * Smooth and slippery with very little tack | ||
| + | * Shrinks significantly upon drying | ||
| + | |||
| + | ==Resources and Citations== | ||
| + | * AIC Global Conservation Forum: [https://community.culturalheritage.org/discussion/iota-carrageenan-as-an-adhesive-for-paper-conservation Query on Iota Carrageenan as an adhesive for paper conservation] Thread date Nov.1 2023. | ||
[[Category:Materials database]] | [[Category:Materials database]] | ||
Revision as of 08:57, 6 November 2023
Description
A water-soluble polysaccharide extracted from several species of red algae such as Chondrus crispus. Carrageenan forms thermo-reversible gels that can change from gel to liquid with changing temperatures. It is used as an emulsifier and stabilizer in food products. In the mid 19th century, carrageenan was used as a size for marbled papers. It was also used as an adhesive in traditional Chinese painting mounting.
Synonyms and Related Terms
3,6-anhydro-d-galactan; carragenano (Esp.); carragenina (It); carageenan; carrageen; carrageenin
Risks
- CDH Fine Chemicals: MSDS
Physical and Chemical Properties
- Soluble in hot water, hot milk, and salted cold water.
- Insoluble in 35% ethanol/water solution.
- Most stable at pH 9.
- CAS = 9000-07-1
Working Properties
- Smooth and slippery with very little tack
- Shrinks significantly upon drying
Resources and Citations
- AIC Global Conservation Forum: Query on Iota Carrageenan as an adhesive for paper conservation Thread date Nov.1 2023.