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27487 Sigma

Citric acid

BioUltra, anhydrous, ≥99.5% (T)

  • CAS Number 77-92-9

  • Linear Formula HOC(COOH)(CH2COOH)2

  • Molecular Weight 192.12

  •  Beilstein Registry Number 782061

  •  EC Number 201-069-1

  •  MDL number MFCD00011669

  •  PubChem Substance ID 57648248

  •  eCl@ss 39021801

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Properties

Related Categories Allium cepa (Onion), Alphabetical, Berberis sp., BioUltra Buffers, Biochemicals and Reagents,
InChI Key   KRKNYBCHXYNGOX-UHFFFAOYSA-N
product line   BioUltra
assay   ≥99.5% (T)
expl. lim.   8 %, 65 °F
impurities   insoluble matter, passes filter test
ign. residue   ≤0.05% (as SO4)
loss   ≤0.5% loss on drying, 110 °C
pH   1.0-2.0 (25 °C, 1 M in H2O)
pKa    (1) 3.13, (2) 4.76, (3) 6.4
mp   153-159 °C(lit.)
solubility   H2O: soluble1 M at 20 °C, clear, colorless
anion traces   chloride (Cl-): ≤5 mg/kg
  oxalate (C2O42-): ≤500 mg/kg
  phosphate (PO43-): ≤5 mg/kg
  sulfate (SO42-): ≤20 mg/kg
  tartrate (C4H4O62-): ≤2000 mg/kg
cation traces   Al: ≤5 mg/kg
  As: ≤0.1 mg/kg
  Ba: ≤5 mg/kg
  Bi: ≤5 mg/kg
  Ca: ≤10 mg/kg
  Cd: ≤5 mg/kg
  Co: ≤5 mg/kg
  Cr: ≤5 mg/kg
  Cu: ≤5 mg/kg
  Fe: ≤5 mg/kg
  K: ≤50 mg/kg
  Li: ≤5 mg/kg
  Mg: ≤5 mg/kg
  Mn: ≤5 mg/kg
  Mo: ≤5 mg/kg
  Na: ≤50 mg/kg
  Ni: ≤5 mg/kg
  Pb: ≤5 mg/kg
  Sr: ≤5 mg/kg
  Zn: ≤5 mg/kg
absorption   260 nm (Amax: ≤0.20)
  280 nm (Amax: ≤0.10)
λ   1 M in H2O
UV absorption   λ: 260 nm Amax: 0.20
  λ: 280 nm Amax: 0.10
Gene Information   human ... SRC(6714)

Description

Other Notes

Buffer component for triple-column amino acid analysis; Optimal buffer for dissociation of radioiodinated antibodies from viable murine tumor cells

Tandem Mass Spectrometry data independently generated by Scripps Center for Metabolomics is available to view or download in PDF. 27487.pdf Tested metabolites are featured on Scripps Center for Metabolomics METLIN Metabolite Database. To learn more, visit sigma.com/metlin.

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Interactive Buffer Table

All labs need water
Safety & Documentation

Safety Information

Symbol 
GHS07  GHS07
Signal word 
Warning
Hazard statements 
Precautionary statements 
Personal Protective Equipment 
RIDADR 
NONH for all modes of transport
WGK Germany 
1
RTECS 
GE7350000
Protocols & Articles

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Peer-Reviewed Papers
15

References

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