402907

Propionic acid

ACS reagent, ≥99.5%

• Sinônimo(s): Acid C₃, Propanoic acid, Propanyl acid
• Fórmula linear: CH₃CH₂COOH
• Número CAS: 79-09-4
• Peso molecular: 74.08
• Beilstein: 506071
• Número CE: 201-176-3
• Número MDL: MFCD00002756
• Código UNSPSC: 12352100
• eCl@ss: 39021305
• ID de substância PubChem: 24865136
• NACRES: NA.21

Propriedades

• grau: ACS reagent
• Nível de qualidade: 200
• densidade de vapor: 2.55 (vs air)
• pressão de vapor: 2.4 mmHg ( 20 °C)
• Ensaio: ≥99.5%
• forma: liquid
• temperatura de autoignição: 955 °F
• Lim. expl.: 12.1 %
• classe(s) química(is) do analito: amino acids
• Impurezas: ≤0.002% Carbonyl compounds; ≤0.10% Readily oxidizable substances (as HCOOH); ≤0.15% water
• resíduo de evaporação: ≤0.01%
• cor: APHA: ≤20
• índice de refração: n20/D 1.386 (lit.)
• pb: 141 °C (lit.)
• pf: −24-−23 °C (lit.)
• solubilidade: H₂O: soluble
• densidade: 0.993 g/mL at 25 °C (lit.)
• traços de cátion: heavy metals (as Pb): ≤0.001%
• cadeia de caracteres SMILES: CCC(O)=O
• InChI: 1S/C3H6O2/c1-2-3(4)5/h2H2,1H3,(H,4,5)
• chave InChI: XBDQKXXYIPTUBI-UHFFFAOYSA-N

Descrição

Descrição geral

Propionic acid (PA) also known as propanoic acid is a short chain fatty acid mainly used as food preservative. It is one of the main metabolic end product formed during the fermentation of undigested food in the colon by the microbiota. Its manufacture by glycerol/glucose co-fermentation using Propionibacterium acidipropionici has been reported. Crystal structure study reveals that PA crystals are monoclinic with space group P2₁/c.

Propionic acid (PA) is a naturally occurring carboxylic acid, which in its pure state exists as a colorless corrosive liquid with an unpleasant odor. It is miscible in water. Industrially it is produced by hydrocarboxylation of ethylene in presence nickel carbonyl as a catalyst. PA has been found to reduce food intake, lower the fatty acids content in plasma and liver, might improve tissue insulin sensitivity and exerts immunosuppressive actions. Propionic acid is an excellent raw material as it is stable, cheap and safe and can even be used as a food additive.

Aplicação

Propionic acid may be used to alter limestone in order to increase its ability of CO₂ uptake.

Informações de segurança

• Pictogramas: GHS02,GHS05,GHS07
• Palavra indicadora: Danger
• Frases de perigo: H226,H314,H335
• Declarações de precaução: P210 - P233 - P240 - P280 - P303 + P361 + P353 - P305 + P351 + P338
• Classificações de perigo: Eye Dam. 1 - Flam. Liq. 3 - Skin Corr. 1B - STOT SE 3
• Órgãos-alvo: Respiratory system
• Código de classe de armazenamento: 3 - Flammable liquids
• Classe de risco de água (WGK): WGK 1
• Ponto de fulgor (°F): 129.2 °F - closed cup
• Ponto de fulgor (°C): 54 °C - closed cup
• Equipamento de proteção individual: Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter