Sulfato de cádmio

Cadmium sulfate
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Nome IUPAC Sulfato de cádmio (III)
Outros nomes Sulfuric acid, cadmium salt (1:1),
Niedermayrite
Identificadores
Número CAS 10124-36-4,
7709-84-3 (monohydrate)
15244-35-9 (octahydrate)
Número EINECS 233-331-6
ChemSpider 23335
ChEBI 50292
Número RTECS EV2700000
SMILES
InChI
1/Cd.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2
Propriedades
Fórmula molecular CdSO4
CdSO4•H2O (monohydrate)
3CdSO4•8H2O (octahydrate)
Massa molar 208.47 g/mol (anhydrous)
226.490 g/mol (monohydrate)
769.546 g/mol (octahydrate)
Aparência Sólido branco higroscópico
Densidade 4.691 g/cm3 (anhydrous)
3.79 g/cm3 (monohydrate)
3.08 g/cm3 (octahydrate)[1]
Ponto de fusão

1000 °C (anhydrous)
105 °C (monohydrate)
40 °C (octahydrate)

Ponto de ebulição

(decomposes to basic sulfate and then oxide)

Solubilidade em água anhydrous:
75 g/100 mL (0 °C)
76.4 g/100 mL (25 °C)
58.4 g/100 mL (99 °C)
octahydrate:
very soluble
Solubilidade insoluble in ethanol
Estrutura
Estrutura cristalina orthorhombic (anhydrous)
monoclinic (octahydrate)
Riscos associados
MSDS [1]
Classificação UE Carc. Cat. 2
Muta. Cat. 2
Repr. Cat. 2
Very toxic (T+)
Dangerous for the environment (N)
Índice UE 048-009-00-9
NFPA 704
1
3
0
 
Frases R R45, R46, R60, R61, R25, R26, R48/23/25, R35
Frases S S53, S45, S60, S61
Compostos relacionados
Outros aniões/ânions Acetato de cádmio,
Cloreto de cádmio,
Nitrato de cádmio
Outros catiões/cátions Sulfato de zinco,
Sulfato de cálcio,
sulfato de magnésio
Página de dados suplementares
Estrutura e propriedades n, εr, etc.
Dados termodinâmicos Phase behaviour
Solid, liquid, gas
Dados espectrais UV, IV, RMN, EM
Exceto onde denotado, os dados referem-se a
materiais sob condições normais de temperatura e pressão
Referências e avisos gerais sobre esta caixa.
Alerta sobre risco à saúde.

Sulfato de cádmio é uma série de compostos químicos inorgânicos com fórmula química CdSO4.xH2O. A forma mais comun é a monohidratadaCdSO4.H2O, mas duas outras formas são conhecidas CdSO4.8/3H2Oe o sal anidro (CdSO4). Todos são altamente solúveis em água e incolores.

Preparação e ocorrência

Sulfato de cádmio octahidratado

CdO + H2SO4 → CdSO4 + H2O
Cd + H2SO4 → CdSO4 + H2

A forma anidra pode ser obtida usando persulfato de sódio :

Cd + Na2S2O8 → CdSO4 + Na2SO4

Sulfato de cádmio é raramente encontrado na natureza.

Aplicações

Sulfato de cádmio é amplamente usado na galvanização de circuitos eletrônicos. É também um precursor para alguns pigmentos baseados em cádmio tais como sulfeto de cádmio.

Referências

  1. ↑ Lide, David R., ed. (2006). CRC Handbook of Chemistry and Physics (87th ed.). Boca Raton, FL: CRC Press. ISBN 0-8493-0487-3

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