Silicon Dioxide CAS TSIS TAU: 7631-86-9
| Catalog Number | XD 92013 |
| Khoom npe | Silicon Dioxide |
| CAS | 7631-86-9 |
| Molecular Formula | O2 Si |
| Molecular Luj | 60.08 Nws |
| Cov ntaub ntawv khaws cia | 2-8 ° C |
| Harmonized tariff Code | 380 29 000 200000 |
Khoom Specification
| Qhov tshwm sim | Dawb hmoov |
| Assay | 99% min |
| Melting point | > 1600 ° C (lit.) |
| Boiling point | ≥100 ° C (lit.) |
| ceev | 2.2-2.6 g / mL ntawm 25 ° C |
| Refractive Index | 1.46 ib |
| Fp | 2230 ° C |
| solubility | Xyaum insoluble hauv dej thiab hauv cov ntxhia acids tshwj tsis yog hydrofluoric acid.Nws dissolves nyob rau hauv kub daws ntawm alkali hydroxides. |
| Specific Gravity | 2.2 |
| Specific Gravity | 0.97 ib |
| Specific Gravity | 1.29 ib |
| PH | 5-8 (100g / l, H2O, 20 ℃) (slurry) |
| Dej Solubility | insoluble |
| rhiab heev | Hygroscopic |
Silica tseem hu ua silicone dioxide.Silica muaj ntau yam kev siv: los tswj cov khoom viscosity, ntxiv bulk, thiab txo cov formulation's transparency.Nws tseem tuaj yeem ua haujlwm ua abrasive.Tsis tas li ntawd, nws tuaj yeem ua raws li tus neeg nqa khoom rau emollients, thiab tuaj yeem siv los txhim kho cov qauv ntawm daim tawv nqaij.Spherical silica yog ntxeem tau thiab absorbent heev, nrog lub peev xwm nqus tau kwv yees li 1.5 npaug ntawm nws qhov hnyav.Ib qho kev thov cuam tshuam nrog silica yog kev tswj roj.Nws muaj nyob rau hauv cov tshuaj pleev thaiv hnub, tshuaj txhuam hniav, thiab ntau yam ntawm lwm yam kev tu tawv nqaij, pleev, thiab npaj tu plaub hau.Nws tau ua tiav siv nyob rau hauv hypoallergenic thiab ua xua-kuaj formulations.
Silica (SiO2) (RI: 1.48) yog mined los ntawm deposits ntawm diatomaceous mos chalk-zoo li pob zeb (keiselghur).Qhov no yog ib pawg tseem ceeb ntawm extender pigments, uas yog siv nyob rau hauv ntau yam particle loj.Lawv yog siv los ua tus neeg sawv cev flatting kom txo cov gloss ntawm cov coatings meej thiab muab cov shear thinning flow zog rau coatings.Lawv kuj kim heev.
Silicon (IV) oxide, amorphous yog siv los ua cov nqa khoom, cov khoom siv ua haujlwm, cov khoom siv tiv thaiv kab mob thiab cov neeg ua haujlwm pub dawb hauv cov tsiaj pub.Defoamer daim ntaub ntawv xws li xim, zaub mov, ntawv, textile thiab lwm yam kev lag luam daim ntaub ntawv.Synthetic silicon dioxide yog siv los ua rheology tswj tus neeg saib xyuas hauv cov yas.Nws kuj yog siv los tsim cov nplaum, sealants thiab silicones.
Kev tsim cov iav, dej iav, refractories, abrasives, ceramics, enamels;decolorizing thiab purifying roj, roj av, thiab lwm yam .;nyob rau hauv scouring- thiab sib tsoo-compounds, ferrosilicon, pwm rau castings;raws li anticaking thiab defoaming tus neeg sawv cev.
