Sapindus mukorossi

Sapindus mukorossi is a species of tree in the family Sapindaceae. The fruit is commonly known as Indian soapberry[1] or washnut,[2] and like other species in the genus Sapindus, it is called soapberry. It is also a native of Western coastal Maharashtra – Konkan, and Goa in India. Sapindus mukorrossi, known as the ritha or reetha tree in India (Hindi) and Nepal,[3][4] is a deciduous tree that is grown in the lower foothills and midhills of the Himalayans,[5] up to altitudes of 4000 feet.[6] It is tolerant to reasonably poor soil, can be planted around farmers’ homes,[7] and one Ritha tree can produce 30–35 kg of fruit per year.[8]

For the genre of Arabic literature, see Rithā'.

Sapindus mukorossi
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Sapindales
Family: Sapindaceae
Genus: Sapindus
Species:
S. mukorossi
Binomial name
Sapindus mukorossi

Uses
Fruits of the washnut tree

The value of the tree mostly comes from its fruit, which can be used for many pharmacological and cleansing purposes including, but not limited to, the ones outlined below.[2]

Cleanser/insecticide

The soapnut contains the compound of saponin, which has natural cleansing properties, and therefore the soapnut can be used as a cleanser for hair, skin, and clothing.[5] These saponins are also useful as insecticides, for purposes such as removing head lice off the scalp.[2]

Medicinal

Upadhyay and Singh[2] have suggested that the soapnut can also be used as a natural remedy for many health problems, such as for treating migrane headaches, or for dermatological purposes such as using the seeds to remove skin impurities like pimples or eczema.

Surfactant

Methods of extracting the maximum amount of oil from existing oil reserves has become a scientific focus in a world that has become dependent on fossil fuels. Researchers have found that the Ritha fruit can be used in an enhanced oil recovery technique.[9] More specifically, Chhetri, Watts, Rahman, and Islam (2009) found that extracts from the soapnut can be used as an organic surfactant to increase the mobility of oil from the fields. In addition, researchers have demonstrated the potential for the soapnut to be used as a natural surfactant for washing arsenic from soils that are rich in iron.[10]

gollark: I checked on the internet™ and apparently the bottom 50% don't contribute very much to tax, presumably because they're already quite slanted that way.
gollark: Hmm, I checked and apparently it seems like you may in fact be able to move the curves substantially rightward without impacting tax income very much.
gollark: They can move somewhere else, however.
gollark: It can't be arbitrarily low. I'm pretty sure those people are the majority of the population.
gollark: But then you would put the graph-sketchers out of business.

References
  1. "Sapindus mukorossi". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 5 November 2015.
  2. Upadhyay, A., & Singh, D. K. (2012). "Pharmacological effects of Sapindus mukorossi". Revista do Instituto de Medicina Tropical de São Paulo. 54 (5): 273–280. doi:10.1590/s0036-46652012000500007. PMID 22983291.CS1 maint: multiple names: authors list (link)
  3. Orwa C. A., Mutua, K. R., & Jamnadasss R. S. A. (2009) Agroforestree Database: a tree reference and selection guide (version 4.0). Retrieved from http://www.worldagroforestry.org/treedb/AFTPDFS/Sapindus_mukorossi.pdf
  4. "Sapindus mukorossi". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 14 December 2014.
  5. Sharma, A.; Sati, S. C.; Sati, O.; Sati, D. M.; Kothiyal, S. K. (2011). "Chemical constituents and bio activities of genus Sapindus" (PDF). International Journal of Research in Ayurveda & Pharmacy. 2 (2): 403–409.
  6. Sarin, J. L.; Beri, M. L. (1939). "Extraction of saponin from soapnut". Industrial and Engineering Chemistry. 31 (6): 712–713. doi:10.1021/ie50354a012.
  7. Forestry Nepal (2014). Sapindus mukorossi. Retrieved from http://www.forestrynepal.org/resources/trees/sapindus-mukorossi
  8. Poudel, K. L. (2011). Trade potentiality and ecological analysis of NTFPs in Himalayan Kingdom of Nepal. Himalayan Research Papers Archives, 61 . Retrieved from http://hdl.handle.net/1928/3300
  9. Chhetri, A. B.; Watts, K. C.; Rahman, M. S.; Islam, M. R. (2009). "Soapnut extract as a natural surfactant for enhanced oil recovery". Energy Sources, Part A: Recovery, Utilization, and Environmental Effects. 31 (20): 1893–1903. doi:10.1080/15567030802462622.
  10. Mukhopadhyay, S.; Hashim, M. A.; Sahu, J. N.; Yusoff, I; Gupta, B. S. (2013). "Comparison of a plant based natural surfactant with SDS for washing of As(V) from Fe rich soil" (PDF). Journal of Environmental Sciences. 25 (11): 2247–2256. doi:10.1016/s1001-0742(12)60295-2. PMID 24552053.

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