(L.f.) P.J.H.Hurter & Mabb.
|Range of Senegalia catechu|
Senegalia catechu is a deciduous, thorny tree which grows up to 15 m (50 ft) in height. The plant is called khair  in Hindi, and kachu in Malay, hence the name was Latinized to "catechu" in Linnaean taxonomy, as the type-species from which the extracts cutch and catechu are derived. Common names for it include kher, catechu, cachou, cutchtree, black cutch, and black catechu.
The tree's seeds are a good source of protein. Kattha (catechu), an extract of its heartwood, is used as an ingredient to give red color and typical flavor to paan. Paan is an Indian and Southeast Asian tradition of chewing betel leaf (Piper betle) with areca nut and slaked lime paste.
Its heartwood extract is used in dyeing and leather tanning, as a preservative for fishing nets, and as a viscosity regulator for oil drilling. Its flowers are a good source of nectar and pollen for bees.
The tree can be propagated by planting its seeds, which are soaked in hot water first. After about six months in a nursery, the seedlings can be planted in the field.
- International Legume Database & Information Service (ILDIS)
- www.haryana-online.com Archived 2011-02-03 at the Wayback Machine
- http://www.yourdictionary.com/catechu Derivation of word from Malay
- Ujwala, T. K.; Tomy, Shawn; Celine, Sandra; Chander, J. Sam Johnson Udaya (2015). "A Systematic Review of Some Potential Anti-Diabetic Herbs Used in India Characterized by Its Hypoglycemic Activity". International Journal of Pharmaceutical Sciences and Research. 6 (12): 4940–4957. ProQuest 1747402306.
- World AgroForestry Database
- Heuzé V., Tran G., Hassoun P., Lebas F., 2018. Black cutch (Senegalia catechu). Feedipedia, a programme by INRA, CIRAD, AFZ and FAO. https://www.feedipedia.org/node/354 Last updated on February 9, 2018, 13:20
- "Plant Details". envis.frlht.org. Retrieved 2014-10-04.
- British Pharmacopoeia, Department of Health, British Pharmacopoeia Commission, London. The Stationery Office, (1999)
- FAO Appendix 1