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CAS number 9013-94-9 YesY
Molecular formula variable
Molar mass variable
Melting point 273 °C (523 °F; 546 K)[1]
Solubility in water Soluble
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Chrysolaminarin is a linear polymer of β(1→3) and β(1→6) linked glucose units in a ratio of 11:1.[1][2] It used to be known as leucosin. Chrysolaminarin is arguably one of the most common biopolymers in the world with cellulose being the other.


Chrysolaminarin is a storage polysaccharide typically found in photosynthetic heterokonts. It is used as a carbohydrate food reserve by phytoplankton such as Bacillariophyta (similar to the use of laminarin by brown algae).[3]

Chrysolaminarin is stored inside the cells of these organisms dissolved in water and encapsuled in vacuoles whose refractive index increases with chrysolaminarin content. In addition, heterokont algae use oil as a storage compound. Besides energy reserve, oil helps the algae to control their buoyancy.[4]


  1. ^ a b Beattie et al.; Hirst, EL; Percival, E (1961). "Studies on the metabolism of the Chrysophyceae. Comparative structural investigations on leucosin (chrysolaminarin) separated from diatoms and laminarin from the brown algae". Biochem J. 79 (3): 531–537. PMC 1205682. PMID 13688276. 
  2. ^ Basic definition of chrysolaminarin, Susquehanna University
  3. ^ Biological use of chrysolaminarin, California State University, Stanislaus
  4. ^ Putz; Gross (2004). "Valuable products from biotechnology of microalgae". Applied Microbiology and Biotechnology 65 (6): 635–48. doi:10.1007/s00253-004-1647-x. PMID 15300417.