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791725 Sigma-Aldrich

Citric acid

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

Synonym: 2-Hydroxy-propane-1,2,3-tricarboxylic acid

  • CAS Number 77-92-9

  • Linear Formula HOC(COOH)(CH2COOH)2

  • Molecular Weight 192.12

  •  Beilstein/REAXYS Number 782061

  •  EC Number 201-069-1

  •  MDL number MFCD00011669

  •  PubChem Substance ID 329768287

  •  NACRES NA.21

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Properties

Related Categories ACS Grade Buffers, Biochemicals and Reagents, Biological Buffers, Buffers A to Z, Building Blocks,
Quality Level   200
grade   ACS reagent
  Redi-Dri
  anhydrous
assay   ≥99.5%
quality   free-flowing
expl. lim.   8 %, 65 °F
impurities   Substances carbonizable by hot sulfuric acid, passes test
ign. residue   ≤0.02%
pKa    (1) 3.13, (2) 4.76, (3) 6.4
mp   153-159 °C (lit.)
anion traces   chloride (Cl-): ≤0.001%
  oxalate (C2O42-): passes test (limit about 0.003%)
  phosphate (PO43-): ≤0.001%
  sulfate (SO42-): ≤0.002%
cation traces   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

Description

General description

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.

Application

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.

Packaging

1 kg in poly bottle

100, 500 g in poly bottle

2.5, 12 kg in poly drum

Legal Information

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

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

Safety & Documentation

Safety Information

Symbol 
GHS07  GHS07
Signal word 
Warning
Hazard statements 
RIDADR 
NONH for all modes of transport
WGK Germany 
WGK 1
RTECS 
GE7350000
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable

Documents

Certificate of Analysis (COA)

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Certificate of Origin (COO)

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Meet Synthia - Retrosynthesis Sofware

Single- & multi-channel pipettes from BRAND
Protocols & Articles

Articles

Enjoy the Free-flowing Experience - Redi-Dri™

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Protocols

Redi-Dri™ FAQs

A time study was performed to test the Red-Dri Packaging System against standard packaging. Equivalent units of both packaging systems containing potassium chloride (KCl) were introduced to a control...
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Peer-Reviewed Papers
15

References

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