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27102 Sigma-Aldrich

Citric acid monohydrate

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

  • CAS Number 5949-29-1

  • Linear Formula HOC(COOH)(CH2COOH)2 · H2O

  • Molecular Weight 210.14

  •  Beilstein Registry Number 4018641

  •  EC Number 201-069-1

  •  MDL number MFCD00149972

  •  PubChem Substance ID 24856428

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Properties

Related Categories Acids, Acids & Bases, Analytical Reagents, Analytical Reagents for General Use, Analytical/Chromatography,
InChI Key   YASYEJJMZJALEJ-UHFFFAOYSA-N
grade   puriss.
assay   99.5-100.5% (based on anhydrous substance)
form   grit
quality   meets analytical specification of Ph. Eur., BP, USP, E330
impurities   residual solvents, complies
  ≤0.0005% heavy metals (as Pb)
  7.5-8.8% water (Karl Fischer)
ign. residue   ≤0.05% (as SO4)
pKa    (1) 3.13, (2) 4.76, (3) 6.4
anion traces   chloride (Cl-): ≤50 mg/kg
  oxalate (as oxalic acid): ≤100 mg/kg
  sulfate (SO42-): ≤100 mg/kg
cation traces   Al: ≤0.2 mg/kg
  As: ≤1 mg/kg
  Ca: ≤200 mg/kg
  Cu: ≤10 mg/kg
  Fe: ≤10 mg/kg
  Hg: ≤1 mg/kg
  Pb: ≤1 mg/kg
  Zn: ≤10 mg/kg
suitability   complies for appearance of solution
  complies for identity (IR)
  complies for reaction against H2SO4

Description

Application

Citric acid monohydrate may be used in the diltiazem hydrochloride (drug) and melt extruded Eudragit RS PO (polymer) formulations. It improves the solubility of drug in the polymer matrix. It may be used to prepare citrate buffer for use in the intravital microscopic studies of adhesion and aggregation of platelets.

General description

Citric acid monohydrate is an organic acid. Its molar enthalpy of solution in water has been reported to be ΔsolHm (298.15K, m = 0.0203molkg-1) = (29061 ± 123)Jmol-1

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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 
GE7810000
Flash Point(F) 
343.4 °F
Flash Point(C) 
173 °C
Protocols & Articles

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