Orthophosphoric acid
CAS Naj Npawb: 7664-38-2
Lub cev lub cev: pob tshab, tsis muaj xim, kua nplaum
EINECS:231-633-2
Cov tshuaj formula: H3PO4
Phosphoric acid
Orthophosphoric acid
Molecular hnyav
cuaj caum-yim
EINECS tus ID nkag mus
231-633-2
Boiling point
261 degree (decomposition)
Qhov ntom
1.874g / mL (kua)
Acid zog
Nruab nrab muaj zog acid
Cov khoom
Inorganic acidification tshuaj
Crystallization yam ntxwv
High concentration, purity, thiab crystallinity
Acid ion:
ntsev
Muaj peb hom phosphates: orthophosphate (muaj PO43-), acid ntsev monohydrogen phosphate (muaj HPO42-), thiab dihydrogen phosphate (muaj H2PO4-).
Kev sib raug zoo ntawm peb hom ntsev yog:
(1) Solubility
Cov ntsev ib txwm thiab cov ntsev monohydrogen: Tsuas yog qee cov ntsev xws li poov tshuaj, sodium, thiab ammonium, tus so yog insoluble hauv dej, tab sis tuaj yeem yaj hauv cov kua qaub.
Dihydrosalts: yooj yim soluble hauv dej.
(2) Kev sib nrig sib hloov
Ntxiv alkaline kua dropwise rau phosphoric acid, thiab raws li cov tshuaj alkaline nce, nws successively generates dihydrogen phosphate, monohydrogen phosphate, thiab phosphate.
Ntxiv cov kua qaub uas muaj zog ntxiv rau cov tshuaj phosphate, thiab thaum cov kua qaub nce ntxiv, tsim cov monohydrogen phosphate, dihydrogen phosphate, thiab phosphate txuas ntxiv.
Kev tshuaj xyuas:
Cov tshuaj tiv thaiv ntawm phosphate thiab tshaj ammonium molybdate nyob rau hauv cov concentrated nitric acid kua ua rau nag lossis daus ntawm lub teeb daj ammonium molybdate crystals, uas yog cov yam ntxwv cov tshuaj tiv thaiv rau kev txheeb xyuas phosphate ions:
PO43-+12MoO42-+3NH4++24H+===(NH4) 3 [P (Mo12O40)] · 6H2O ↓+6H2O
|
Yam khoom |
SPECIFICATION |
|
(H3PO4) H3PO3 CaSO 4 Acetic acid NAS 3 P2O5 |
85.0% 120 mg/kg ± 1500ppm 10 ppm 5 ppm ＞61.5% |
Orthophosphoric acid yog ib qho tseem ceeb ntawm cov khoom siv raw, thiab nws cov haujlwm tseem ceeb yog raws li hauv qab no:
Cov txheej txheem hlau nto los tsim cov phosphate insoluble films los tiv thaiv cov hlau los ntawm corrosion.
Sib tov nrog nitric acid ua cov tshuaj txhuam hniav los txhim kho qhov smoothness ntawm cov hlau.
Phosphate esters yog cov khoom siv raw los tsim cov khoom siv ntxhua khaub ncaws thiab tshuaj tua kab.
Cov khoom siv raw los tsim cov phosphorus uas muaj cov nplaim hluav taws.
Ua tsaug rau koj tuaj xyuas thiab txais tos koj cov lus nug zoo!
Cim npe nrov: Tuam Tshoj orthophosphoric acid manufacturers, lwm tus neeg, Hoobkas
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