402907

Propionic acid

ACS reagent, ≥99.5%

• Sinónimos: Acid C₃, Propanoic acid, Propanyl acid
• Fórmula lineal: CH₃CH₂COOH
• Número de 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 la sustancia en PubChem: 24865136
• NACRES: NA.21

Propiedades

• grado: ACS reagent
• Nivel de calidad: 200
• densidad de vapor: 2.55 (vs air)
• presión de vapor: 2.4 mmHg ( 20 °C)
• Análisis: ≥99.5%
• formulario: liquid
• temp. de autoignición: 955 °F
• lim. expl.: 12.1 %
• clases químicas de analitos: amino acids
• impurezas: ≤0.002% Carbonyl compounds; ≤0.10% Readily oxidizable substances (as HCOOH); ≤0.15% water
• residuo de evap.: ≤0.01%
• color: APHA: ≤20
• índice de refracción: n20/D 1.386 (lit.)
• bp: 141 °C (lit.)
• mp: −24-−23 °C (lit.)
• solubilidad: H₂O: soluble
• densidad: 0.993 g/mL at 25 °C (lit.)
• trazas de catión: heavy metals (as Pb): ≤0.001%
• cadena SMILES: CCC(O)=O
• InChI: 1S/C3H6O2/c1-2-3(4)5/h2H2,1H3,(H,4,5)
• Clave InChI: XBDQKXXYIPTUBI-UHFFFAOYSA-N

Descripción

Descripción general

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.

Aplicación

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

Información de seguridad

• Pictogramas: GHS02,GHS05,GHS07
• Palabra de señalización: Danger
• Frases de peligro: H226,H314,H335
• Consejos de prudencia: P210 - P233 - P240 - P280 - P303 + P361 + P353 - P305 + P351 + P338
• Clasificaciones de peligro: Eye Dam. 1 - Flam. Liq. 3 - Skin Corr. 1B - STOT SE 3
• Órganos de actuación: Respiratory system
• Código de clase de almacenamiento: 3 - Flammable liquids
• Clase de riesgo para el agua (WGK): WGK 1
• Punto de inflamabilidad (°F): 129.2 °F - closed cup
• Punto de inflamabilidad (°C): 54 °C - closed cup
• Equipo de protección personal: Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter