Propilenoglicol

Propilenoglicol
Alerta sobre risco à saúde[1]
Nome IUPAC propane-1,2-diol
Outros nomes propano-1,2-diol
Identificadores
Número CAS 57-55-6
Número RTECS TY6300000
SMILES
Propriedades
Fórmula molecular C3H8O2
Massa molar 76.09 g/mol
Densidade 1.036 g/cm³
Ponto de fusão

-59 °C

Ponto de ebulição

188.2 °C

Solubilidade em água totalmente miscível
Solubilidade em [[Etanol]] totalmente miscível
Solubilidade em [[Éter dietílico]] totalmente miscível
Solubilidade em [[Acetona]] totalmente miscível
Solubilidade em [[Clorofórmio]] totalmente miscível
Condutividade térmica 0.34 W/m-K (50% H2O @ 90 °C)
Riscos associados
MSDS External MSDS
NFPA 704
1
0
0
 
Frases S S24 S25
Compostos relacionados
Outros aniões/ânions Propano-1,2-diamina
1,2-Difluoropropano
Propano-1,2-ditiol
Álcoois relacionados Etilenoglicol
Propanol
Isopropanol
Propano-1,3-diol
Glicerol (propano-1,2,3-triol)
Butano-1,2-diol
Compostos relacionados Ácido láctico (2-hidroxi-propanoico)
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.

Propilenoglicol, conhecido também pelo nome sistemático propano-1,2-diol, é um composto orgânico (um álcool diol), viscoso, de sabor amargo, inodoro e incolor, que é higroscópico e miscível com água, acetona e clorofórmio.

Quiralidade

O propilenoglicol contém um átomo de carbono assimétrico, então existe em dois estereoisômeros. O produto comercial é uma mistura racêmica. Isômeros ópticos puros podem ser obtidos por hidratação de óxido de propileno opticamente puro.[2]

Produção

Industrialmente, o propilenoglicol é produzido por hidratação do óxido de propileno. Diferentes fabricantes usam processos não catalíticos a alta temperatura (200-220 °C) ou tots catalíticas as quais se processam a 150-180 °C na presença de resinas trocadoras de íons ou pequenas quantidades de ácido sulfúrico ou álcalis. Os produtos finais contém 20% de 1,2-propanodiol, 1,5% de dipropileno glicol e pequena quantidade de outros polipropilenoglicóis.[3] O propilenoglicol pode também ser convertido de glicerol, um subproduto do biodiesel.

Aplicações

O propilenoglicol é usado:

Referências

  1. Merck Index, 11th Edition, 7868.
  2. «1,2-Propanediol». ChemIndustry.ru. Consultado em 28 de dezembro de 2007 
  3. 1,2-propanediol: chemical product info at CHEMINDUSTRY.RU
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