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31232 Sigma-Aldrich

Iron(III) chloride hexahydrate

puriss. p.a., Reag. Ph. Eur., ≥99%

Synonym: Ferric chloride hexahydrate

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Properties

Related Categories Analytical Reagents, Analytical Reagents for General Use, Analytical/Chromatography, Essential Chemicals, I-N, Puriss p.a.,
grade   Reag. Ph. Eur.
vapor pressure   1 mmHg ( 194 °C)
InChI Key   NQXWGWZJXJUMQB-UHFFFAOYSA-K
grade   puriss. p.a.
assay   ≥99%
impurities   ≤0.001% free chlorine (Cl)
  ≤0.001% total nitrogen (N)
  ≤0.05% sub.not precip.b.NH4OH(SO4)
  ≤0.2% free acid (as HCl)
bp   280-285 °C (lit.)
mp   37 °C (lit.)
anion traces   phosphate (PO43-): ≤100 mg/kg
  sulfate (SO42-): ≤50 mg/kg
cation traces   As: ≤5 mg/kg
  Cu: ≤20 mg/kg
  Fe2+: ≤50 mg/kg
  Pb: ≤20 mg/kg
  Zn: ≤20 mg/kg

Description

General description

Iron(III) chloride hexahydrate can be obtained from crystallization of iron(III) chloride from water. Its crystal structure has been studied using three-dimensional single-crystal X-ray-diffraction data. Its crystals have two chloride ions and four water molecules arranged around each ferric ion to form octahedral trans-[FeCl2(OH2)4]+ ions having C2h-2/m symmetry.

Application

Iron(III) chloride hexahydrate may be employed as an oxidant for the following conversions:
• Synthesis of 2-substituted 4(3H)-quinazolinones (yield = 77-93%), via condensation of aldehydes with anthranilamide.
• Oxidation of 1,4-dihydropyridines (1,4-DHPs) to corresponding pyridines.
• Oxidation of 4-isopropyl-1,4-DHP to dealkylated pyridine.

Safety & Documentation

Safety Information

Symbol 
Signal word 
Danger
Hazard statements 
Precautionary statements 
RIDADR 
UN 3260 8 / PGIII
WGK Germany 
1
RTECS 
NO5425000

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