402907

Acide propionique

ACS reagent, ≥99.5%

• Synonyme(s) : Acide en C₃, Acide propanoïque, Acide propanyl
• Formule linéaire : CH₃CH₂COOH
• Numéro CAS: 79-09-4
• Poids moléculaire : 74.08
• Numéro Beilstein : 506071
• Numéro CE : 201-176-3
• Numéro MDL: MFCD00002756
• Code UNSPSC : 12352100
• eCl@ss : 39021305
• ID de substance PubChem : 24865136
• Nomenclature NACRES : NA.21

Propriétés

• Qualité: ACS reagent
• Niveau de qualité: 200
• Densité de vapeur: 2.55 (vs air)
• Pression de vapeur: 2.4 mmHg ( 20 °C)
• Pureté: ≥99.5%
• Forme: liquid
• Température d'inflammation spontanée: 955 °F
• Limite d'explosivité: 12.1 %
• Classe(s) chimique(s) de l'analyte: amino acids
• Impuretés: ≤0.002% Carbonyl compounds; ≤0.10% Readily oxidizable substances (as HCOOH); ≤0.15% water
• Résidus d'évap.: ≤0.01%
• Couleur: APHA: ≤20
• Indice de réfraction: n20/D 1.386 (lit.)
• Point d'ébullition: 141 °C (lit.)
• Pf: −24-−23 °C (lit.)
• Solubilité: H₂O: soluble
• Densité: 0.993 g/mL at 25 °C (lit.)
• Traces de cations: heavy metals (as Pb): ≤0.001%
• Groupe fonctionnel: carboxylic acid
• Chaîne SMILES: CCC(O)=O
• InChI: 1S/C3H6O2/c1-2-3(4)5/h2H2,1H3,(H,4,5)
• Clé InChI: XBDQKXXYIPTUBI-UHFFFAOYSA-N

Description

Description générale

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.

Application

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

Informations sur la sécurité

• Pictogrammes: GHS02,GHS05,GHS07
• Mention d'avertissement: Danger
• Mentions de danger: H226,H314,H335
• Conseils de prudence: P210 - P233 - P240 - P280 - P303 + P361 + P353 - P305 + P351 + P338
• Classification des risques: Eye Dam. 1 - Flam. Liq. 3 - Skin Corr. 1B - STOT SE 3
• Organes cibles: Respiratory system
• Code de la classe de stockage: 3 - Flammable liquids
• Classe de danger pour l'eau (WGK): WGK 1
• Point d'éclair (°F): 129.2 °F - closed cup
• Point d'éclair (°C): 54 °C - closed cup
• Équipement de protection individuelle: Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter