791725

Zitronensäure

anhydrous, free-flowing, Redi-Dri^™, ACS reagent, ≥99.5%

• Synonym(e): 2-Hydroxy-propane-1,2,3-tricarboxylic acid
• Lineare Formel: HOC(COOH)(CH₂COOH)₂
• CAS-Nummer: 77-92-9
• Molekulargewicht: 192.12
• Beilstein: 782061
• EG-Nummer: 201-069-1
• MDL-Nummer: MFCD00011669
• UNSPSC-Code: 12352100
• PubChem Substanz-ID: 329768287
• NACRES: NA.21

Eigenschaften

• Qualität: ACS reagent; anhydrous; free-flowing
• Qualitätsniveau: 200
• Produktlinie: Redi-Dri^™
• Assay: ≥99.5%
• Form: crystals
• Expl.-Gr.: 8 %, 65 °F
• Verunreinigungen: Substances carbonizable by hot sulfuric acid, passes test
• Glührückstand: ≤0.02%
• pKa: (1) 3.13, (2) 4.76, (3) 6.4
• mp (Schmelzpunkt): 153-159 °C (lit.)
• Anionenspuren: chloride (Cl^-): ≤0.001%; oxalate (C₂O₄^2-): passes test (limit about 0.003%); phosphate (PO₄^3-): ≤0.001%; sulfate (SO₄^2-): ≤0.002%
• Kationenspuren: Fe: ≤3 ppm; Pb: ≤2 ppm
• SMILES String: OC(=O)CC(O)(CC(O)=O)C(O)=O
• InChI: 1S/C6H8O7/c7-3(8)1-6(13,5(11)12)2-4(9)10/h13H,1-2H2,(H,7,8)(H,9,10)(H,11,12)
• InChIKey: KRKNYBCHXYNGOX-UHFFFAOYSA-N

Beschreibung

Allgemeine Beschreibung

Citric acid also called 2-hydroxy-propane-1,2,3-tricarboxylic acid, is a component of the tricarboxylic acid cycle in all organisms. Industrial production of citric acid use fungal, yeast and citrus fruit as the major source. Aspergillus niger is majorly used for citric acid production by fermentation Manganese inhibits fermentative production of citric acid Oral supplementation of citric acid promotes tricarboxylic acid cycle and oxidative phosphorylation in mitochondria, attenuating physical fatigue.

Anwendung

Citric acidhas been used as a component of citrate buffer and Fe-free sauton′s medium. It has been used in hybridization chain reaction buffer for preequilibration of coverslips for testes sections.

Rechtliche Hinweise

Redi-Dri^™ is a trademark of Sigma-Aldrich Co. LLC

Redi-Dri is a trademark of Sigma-Aldrich Co. LLC

Sicherheitshinweise

• Piktogramme: GHS07
• Signalwort: Warning
• H-Sätze: H319,H335
• P-Sätze: P261 - P264 - P271 - P280 - P304 + P340 + P312 - P305 + P351 + P338
• Gefahreneinstufungen: Eye Irrit. 2 - STOT SE 3
• Zielorgane: Respiratory system
• Lagerklassenschlüssel: 11 - Combustible Solids
• WGK: WGK 1
• Flammpunkt (°F): Not applicable
• Flammpunkt (°C): Not applicable