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Table of Contents

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Table 1: Physical and chemical properties of perfluorocarbon tracers


Property

PFMCH

PFMD

PFD

CAS Number



306-94-5

Molecular Formula

C7F14

C11F20

C10F18

Molecular Weight (g/mol)

350.05

512.09

462.08

Boiling Point °C

76

160

142

Density (g/mL)

1.788

1.972

1.908

Solubility in Water (mg/L)

~2

~10


Solubility in Methanol (mg/L)

104



Solubility in Hexane (mg/L)


470,000


Vapor Pressure @ 25C (kPa)

14.11

0.29





Notes on PFMD and PFMCH


Both perfluoromethyldecalin (PFMD) and perfluoromethylcyclohexane (PFMCH) are miscible in each other. The vapor pressure of PFMCH is fairly high so it evaporates readily and quickly at standard room pressure and temperature. The evaporation of PFMD is less significant. The low solubility in water for either compound facilitates gas-phase partitioning and quantitative headspace analysis.
The purity of PFMD purchased from Oakwood Chemical is approximately 80-90%. The predominant contaminants tend to be perfluorodecalin and perfluoro-tert-cyclohexane. The purity of a batch may be found by navigating to Oakwood Chemical's website, searching for "decalin", selecting perfluoromethyldecalin, going to the CofA tab and entering the LOT # located on the bottle label.

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Both PFMCH and PFMD are considered to be non-hazardous by US and EU classifications under normal conditions.


Chemical Hazards:


  • Incompatible substances: oxidizing agents, strong acids, strong bases
  • Emits toxic fumes (HF) under fire conditions

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