Arzén-pentoxid

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arzén-pentoxid

arzén-pentoxid
Más nevek arzén(V)-oxid
arzén-oxid
arzénsavanhidrid
Kémiai azonosítók
CAS-szám 1303-28-2
PubChem 14771
ChemSpider 14088
EINECS-szám 215-116-9
RTECS szám CG2275000
SMILES
O=[As](=O)O[As](=O)=O
InChI
1/As2O5/c3-1(4)7-2(5)6
InChIKey COHDHYZHOPQOFD-UHFFFAOYSA-N
Kémiai és fizikai tulajdonságok
Kémiai képlet As2O5
Moláris tömeg 229,8402 g/mol
Megjelenés fehér, higroszkópos por
Sűrűség 4,32 g/cm³
Olvadáspont 315 °C (bomlik)
Oldhatóság (vízben) 59,5 g/100 ml (0 °C)
65,8 g/100 ml (20 °C)
8,20 g/100 ml (100 °C)
Oldhatóság oldódik alkoholban
Savasság (pKa) 7
Veszélyek
EU osztályozás erősen mérgező (T+)
1. kategóriájú karcinogén
környezetre veszélyes (N)
NFPA 704
0
2
0
 
R mondatok R45, R23/25, R50/53
S mondatok S53, S45, S60, S61
LD50 8 mg/kg (patkány, szájon át)
Rokon vegyületek
Azonos anion foszfor-pentoxid
antimon-pentoxid
Rokon vegyületek arzén-trioxid
arzénsav
Ha másként nem jelöljük, az adatok az anyag standardállapotára (100 kPa) és 25 °C-os hőmérsékletre vonatkoznak.

Az arzén-pentoxid az arzén egyik oxidja, képlete As2O5.

Előállítása

Vízelvonással állítják elő arzénsavból, arzén és salétromsav reakciójában keletkezik.

Tulajdonságai

Fehér, amorf, szilárd anyag. Magas hőfokon oxigénre és arzén(III)-oxidra bomlik. Erős oxidálószer, vizes oldata gyenge sav, amit arzén(V)-savnak (arzénsav) hívnak, képlete H3AsO4. Vízben és etanolban is oldódik.

Felhasználása

Gyomirtók, gombaölőszerek, fakonzerváló anyagok előállítására, festékek gyártására használják.

Káros hatásai

Irritáló hatású a bőrre és a légzőrendszerre nézve, mérgező hatású a keringési rendszerre, az idegrendszerre és a májra nézve.

Ez a kémiai tárgyú lap egyelőre csonk (erősen hiányos). Segíts te is, hogy igazi szócikk lehessen belőle!

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