Ntawm lub hauv paus ntawm xanthan cov pos hniav nyob nws cov saw hlau polysaccharide; nws cov pob txha caj qaum muaj cov piam thaj txuas ua ke ntawm -1,4 glycosidic bonds los ua ib txoj hlua ntev. Cov qauv linear ntawm cov pob txha no muab ib qho kev ruaj khov rau tag nrho cov molecule, ua kom nws tswj tau nws cov kev sib xyaw ua ke thiab cov qauv kev ncaj ncees hauv cov kev daws teeb meem aqueous. Nws yog qhov tseeb ntawm cov pob txha ruaj khov uas tso cai rau xanthan cov pos hniav kom nthuav tawm cov viscosity zoo kawg nkaus thiab cov khoom zoo rheological, txawm tias tsis tshua muaj siab. Txuas ntxiv los ntawm cov piam thaj tshwj xeeb ntawm cov pob txha no, xanthan molecule nta trisaccharide sab chains uas muaj mannose, glucuronic acid, thiab mannose. Cov glucuronic acid residues nyob rau hauv cov sab chains dais carboxyl pawg (–COOH), uas tuaj yeem tsim cov ntsev nrog hlau ions-xws li sodium, potassium, los yog calcium- yog li hloov xanthan acid rau hauv xanthan gum. Cov saw hlau no tsis tsuas yog txhim kho cov molecule lub steric qauv thiab solubility tab sis kuj endow xanthan cov pos hniav nrog cov yam ntxwv tsis-Newtonian kua; Qhov no txhais tau hais tias nws cov kev daws teeb meem nthuav dav ntxiv thaum raug nplawm lossis shear quab yuam, tseem khaws lawv qhov sib xws thaum sab laug los sawv ntsug.
Cov pawg carboxylate hauv xanthan cov pos hniav yog qhov tseem ceeb rau nws txoj haujlwm molecular. Los ntawm kev tsim cov ionic bonds nrog hlau ions, xanthan cov pos hniav tau txais kev tiv thaiv rau cov kua qaub, cov hauv paus, thiab ntsev, nrog rau qee qhov kev ruaj ntseg thermal. Cov pab pawg ntsev no txhawb cov molecule kev ruaj ntseg nyob rau hauv ib puag ncig aqueous, ua kom nws tswj nws cov qauv colloidal nyob rau hauv cov xwm txheej nyuaj thaum muab ntau yam kev ua haujlwm, suav nrog emulsification, ncua, thiab thickening. Yog li ntawd, xanthan cov pos hniav ua hauj lwm ib txhij raws li ib tug polymeric polysaccharide thiab ua hauj lwm ntsev -raws li cov khoom, tuav tus nqi tseem ceeb thiab daim ntawv thov thoob plaws cov zaub mov, tshuaj, tshuaj pleev ib ce, thiab industrial sectors.
