Tragacanthus gum (Tragacanth, Gummi Tragacanthae, tragacanthus, E413) - stabilizer; Cov pos hniav qhuav ntws los ntawm qhov incisions ntawm stems thiab ceg ntawm thorny shrub astragalus tragacanthus.
Qhov chaw ntawm cov pos hniav yog 12-15 hom. Cov chaw sau qoob loo yog cov roob nruab nrab ntawm Southeastern Turkey, Northwestern thiab yav qab teb Iran. Yav dhau los, kev sau qoob loo tau nqa tawm hauv lub tebchaws Transcaucasia thiab hauv Turkmenistan (Kopetdag). Ob qho tib si natural outflows thiab outflows los ntawm tshwj xeeb incisions yog sau.
Muaj ob hom tragacanthus cov pos hniav nyob rau hauv kev lag luam ntawm cov teb chaws Europe: Persian tragacanthus (ntau zaus) thiab Anatolian tragacanthus. Ntawm ciam teb ntawm Pakistan, Is Nrias teb thiab Afghanistan, cov pos hniav hu ua Chitral gum tau txais.
Tragacanthum cov pos hniav yog siv nyob rau hauv kws tshuaj rau kev npaj ntawm ncua kev kawm ntawv, raws li lub hauv paus rau cov ntsiav tshuaj thiab tshuaj. Nws kuj yog siv nyob rau hauv kev npaj ntawm confectionery mastic rau lub zog ntawm loj.