Merck
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251275

Sigma-Aldrich

Citric acid

ACS reagent, ≥99.5%

Synonym(s):
2-Hydroxy-1,2,3-propanetricarboxylic acid, 2-Hydroxypropan-1,2,3-tricarboxylic acid
Linear Formula:
HOC(COOH)(CH2COOH)2
CAS Number:
Molecular Weight:
192.12
Beilstein:
782061
Número de EC:
Número MDL:
eCl@ss:
39021801
ID de la sustancia en PubChem:

grado

ACS reagent

Nivel de calidad

ensayo

≥99.5%

formulario

crystals

lim. expl.

8 %, 65 °F

impurezas

Substances carbonizable by hot sulfuric acid, passes test

residuo de ign.

≤0.02%

pKa 

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

mp

153-159 °C (lit.)

trazas de anión

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

trazas de catión

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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This Item
W230618113436827109
Citric acid ACS reagent, ≥99.5%

Sigma-Aldrich

251275

Citric acid

Citric acid ≥99.5%, FCC, FG

Sigma-Aldrich

W230618

Citric acid

Citric acid United States Pharmacopeia (USP) Reference Standard

USP

1134368

Citric acid

Citric acid meets analytical specification of Ph. Eur., BP, USP, E330, anhydrous, 99.5-100.5% (based on anhydrous substance)

Sigma-Aldrich

27109

Citric acid

assay

≥99.5%

assay

≥99.5%

assay

-

assay

99.5-100.5% (based on anhydrous substance)

form

crystals

form

powder or granules

form

-

form

grit

mp

153-159 °C (lit.)

mp

153-159 °C (lit.)

mp

153-159 °C (lit.)

mp

153-159 °C (lit.)

Quality Level

200

Quality Level

400

Quality Level

-

Quality Level

200

grade

ACS reagent

grade

FG, Halal, Kosher

grade

pharmaceutical primary standard (unable to validate for USP)

grade

-

expl. lim.

8 %, 65 °F

expl. lim.

8 %, 65 °F

expl. lim.

8 %, 65 °F

expl. lim.

8 %, 65 °F

Descripción general

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

Aplicación

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.

Información legal

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

pictogramas

Exclamation mark

Palabra de señalización

Warning

Frases de peligro

Clasificaciones de peligro

Eye Irrit. 2 - STOT SE 3

Órganos de actuación

Respiratory system

Código de clase de almacenamiento

11 - Combustible Solids

WGK

WGK 1

Punto de inflamabilidad F

Not applicable

Punto de inflamabilidad C

Not applicable

Equipo de protección personal

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Origin

Enter Lot Number to search for Certificate of Origin (COO).

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