PVP-K30 Cas: 9003-39-8 Dawb rau daj daj hmoov hmoov
| Catalog Number | xwm 90232 |
| Khoom npe | PVP-K30 |
| CAS | 9003-39-8 |
| Molecular Formula | C8H15 Nr |
| Molecular Luj | 141.2108 Nws |
| Cov ntaub ntawv khaws cia | Ambient |
| Harmonized tariff Code | 3 905990 |
Khoom Specification
| Dej | <5% |
| Cov hlau hnyav | <10ppm |
| pH | 3 - 7 |
| Residue ntawm Ignition | <0.1% |
| Aldehydes | 0.05% max |
| Nitrogen | 11.5 - 12.8% |
| Qhov tshwm sim | Dawb mus rau yellowish dawb hmoov |
| K Tus nqi | 27-32.4 Nws |
| Hydrazine | 1.0% max |
| Assay | 99% |
Peb tau tshawb xyuas lub cev ruaj khov ntawm amorphous curcumin dispersions thiab lub luag hauj lwm ntawm curcumin-polymer intermolecular kev sib cuam tshuam hauv kev ncua sij hawm crystallization.Curcumin yog ib qho kev nthuav qauv sib xyaw ua ke vim nws tsim ob qho tib si intra thiab intermolecular hydrogen bonds hauv cov siv lead ua.Cov txheej txheem sib txawv ntawm amorphous dispersion polymers tau tshawb xyuas;poly (vinylpyrrolidone), Eudragit E100, carboxymethyl cellulose acetate butyrate, hydroxypropyl methyl cellulose (HPMC) thiab HPMC-acetate succinate.Mid-infrared spectroscopy tau siv los txiav txim siab thiab ntsuas qhov twg ntawm curcumin-polymer kev sib cuam tshuam.Lub cev ruaj khov nyob rau hauv ib puag ncig sib txawv tau saib xyuas los ntawm hmoov X-ray diffraction.Curcumin tshuaj stability tau saib xyuas los ntawm UV-Vis spectroscopy.Kev rho tawm ntawm qhov ruaj khov amorphous curcumin yog qhov nyuaj thaum tsis muaj cov polymers.Polymers ua pov thawj tias ua tau zoo curcumin crystallization inhibitors ua rau kev tsim cov khoom amorphous dispersions;Txawm li cas los xij, cov polymers tau pom muaj peev xwm sib txawv heev los tiv thaiv crystallization thaum lub sij hawm ntev cia.Curcumin intramolecular hydrogen bonding txo qhov ntawm nws cov hydrogen bonding nrog polymers;Yog li ntawd, feem ntau cov polymers tsis tau zoo crystallization inhibitors.Zuag qhia tag nrho, cov polymers tau ua pov thawj tias yog crystallization inhibitors, tab sis inhibition raug txwv vim yog cov intramolecular hydrogen bonding hauv curcumin, uas ua rau txo qis hauv lub peev xwm ntawm cov polymers los cuam tshuam ntawm qib molecular.
