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25116 Sigma-Aldrich

Sodium citrate tribasic dihydrate

puriss., meets analytical specification of Ph. Eur., BP, USP, FCC, E331, 99-100.5% (calc. to the dried substance)

Synonym: Citric acid trisodium salt dihydrate, Trisodium citrate dihydrate

  • CAS Number 6132-04-3

  • Linear Formula HOC(COONa)(CH2COONa)2 · 2H2O

  • Molecular Weight 294.10

  •  Beilstein Registry Number 6104939

  •  EC Number 200-675-3

  •  MDL number MFCD00150031

  •  PubChem Substance ID 57648115

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Properties

Related Categories Analytical Reagents, Analytical Reagents for General Use, Analytical/Chromatography, Building Blocks, Carbonyl Compounds,
InChI Key   NLJMYIDDQXHKNR-UHFFFAOYSA-K
grade   puriss.
assay   99-100.5% (calc. to the dried substance)
quality   meets analytical specification of Ph. Eur., BP, USP, FCC, E331
impurities   Residual solvent, in accordance
  acidity or alkalinity, complies
  ≤0.0005% heavy metals (as Pb)
  ≤0.04% free alkali (as NaOH)
  ≤0.06% free acid (as C6H8O7)
  11.0-13.0 water (Karl Fischer)
loss   11-13% loss on drying, 180 °C, 18 h
pH   7.5-9.0 (20 °C, 5%)
mp   >300 °C(lit.)
anion traces   chloride (Cl-): ≤30 mg/kg
  oxalate (as oxalic acid): ≤100 mg/kg
  sulfate (SO42-): ≤50 mg/kg
  tartrate (C4H4O62-): in accordance
cation traces   As: ≤1 mg/kg
  Cu: ≤10 mg/kg
  Fe: ≤10 mg/kg
  Hg: ≤1 mg/kg
  Pb: ≤1 mg/kg
  Zn: ≤10 mg/kg
suitability   alkaline for reaction against litmus
  complies for appearance of solution
  complies for reaction against H2SO4

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Safety & Documentation

Safety Information

RIDADR 
NONH for all modes of transport
WGK Germany 
1

Documents

Certificate of Analysis

Protocols & Articles
Peer-Reviewed Papers
15

References

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