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251275

Sigma-Aldrich

Citric acid

ACS reagent, ≥99.5%

Fórmula linear:
HOC(COOH)(CH2COOH)2
Número CAS:
Peso molecular:
192.12
Beilstein:
782061
Número EC:
Número MDL:
eCl@ss:
39021801
ID de substância PubChem:

Nível de qualidade

200

grau

ACS reagent

teor

≥99.5%

forma

crystals

Lim. expl.

8 %, 65 °F

Impurezas

Substances carbonizable by hot sulfuric acid, passes test

resíduo de ignição

≤0.02%

pKa 

(1) 3.13, (2) 4.76, (3) 6.4

pf

153-159 °C (lit.)

traços de ânion

chloride (Cl-): ≤0.001%
oxalate (C2O42-): passes test (limit about 0.003%)
phosphate (PO43-): ≤0.001%
sulfate (SO42-): ≤0.002%

traços de cátion

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)

InChI key

KRKNYBCHXYNGOX-UHFFFAOYSA-N

Gene Information

human ... SRC(6714)

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Descrição geral

Citric acid is an organic acid commonly used as a chelating agent, a buffering agent, for pH adjustment and derivatization.

Aplicação

Citric acid has been used to prepare:
  • Phosphate citrate buffer for use in enzyme-linked immunosorbent assay.
  • Citrate-stabilized ceria aqueous sol, which was employed in the synthesis of cerium oxide nanoparticles.
  • Citric acid-Na2HPO4-buffered stock solution for use in the determination of fecal urease activity.
  • Anticoagulant citrate dextrose solution A (ACD-A), which is employed during the isolation of blood-derived endothelial progenitor cells.

Citric acid has also been used:
  • In a novel process which allows controlling of the particle size during the synthesis of palladium cuboctahedrons.
  • To prepare citric acid-derived carbon nanodots (CNDs) by bottom-up carbonization method.
  • As a bi-component chelating agent for the synthesis of Li4Ti5O12 (lithium titanate oxide) by a novel sol–gel method.

Embalagem

5, 100, 500 g in poly bottle
1, 2.5 kg in poly bottle
12 kg in fiber drum

Informações legais

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

Pictogramas

Exclamation mark

Palavra indicadora

Warning

Frases de perigo

Classificações de perigo

Eye Irrit. 2

Código de classe de armazenamento

11 - Combustible Solids

WGK

WGK 1

Ponto de fulgor (ºF)

Not applicable

Ponto de fulgor (ºC)

Not applicable

Equipamento de proteção individual

dust mask type N95 (US), Eyeshields, Gloves

Certificado de análise

Certificado de origem

Citric Acid
Lopez-Garcia, R
Kirk-Othmer Encyclopedia of Chemical Technology (2010)
Investigation of Size-Dependent Plasmonic and Catalytic Properties of Metallic Nanocrystals Enabled by Size Control with HCl Oxidative Etching.
Li B, et al.
Small, 8(11), 1710-1716 (2012)
Cerium fluoride nanoparticles protect cells against oxidative stress.
Shcherbakov AB, et al.
Materials Science & Engineering. C, Materials For Biological Applications, 50, 151-159 (2015)
Juan M Melero-Martin et al.
Methods in enzymology, 445, 303-329 (2008-11-22)
Rapid and complete vascularization of ischemic tissues and thick engineered tissues is likely to require vasculogenesis. Therefore, the search for clinically relevant sources of vasculogenic cells and the subsequent development of experimental models of vasculogenesis is of utmost importance. Here
Beyond bottom-up carbon nanodots: Citric-acid derived organic molecules.
Zhu S, et al.
Nano Today (2015)

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