Heptachlor

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Phase change data

Go To: Top, IR Spectrum, Mass spectrum (electron ionization), References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Tfus366.KN/APlato, 1972Crystal phase 1 phase; Uncertainty assigned by TRC = 1. K; TRC
Tfus369.0KN/APlato and Glasgow, 1969Uncertainty assigned by TRC = 0.2 K; TRC

Enthalpy of vaporization

ΔvapH (kJ/mol) Temperature (K) Method Reference Comment
76.5398.GCHinckley, Bidleman, et al., 1990Based on data from 343. - 453. K.; AC

Enthalpy of fusion

ΔfusH (kJ/mol) Temperature (K) Method Reference Comment
20.72362.2TGA,DSCRodante, Vecchio, et al., 2000AC
2.09371.DSCKsia«807»azczak and Nagata, 1995AC

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


IR Spectrum

Go To: Top, Phase change data, Mass spectrum (electron ionization), References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director

Gas Phase Spectrum

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IR spectrum
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Notice: Concentration information is not available for this spectrum and, therefore, molar absorptivity values cannot be derived.

Additional Data

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Owner NIST Standard Reference Data Program
Collection (C) 2018 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin NIST Mass Spectrometry Data Center
State gas
Instrument HP-GC/MS/IRD

This IR spectrum is from the NIST/EPA Gas-Phase Infrared Database .


Mass spectrum (electron ionization)

Go To: Top, Phase change data, IR Spectrum, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Mass spectrum
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Additional Data

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Due to licensing restrictions, this spectrum cannot be downloaded.

Owner NIST Mass Spectrometry Data Center
Collection (C) 2014 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin NIST Mass Spectrometry Data Center, 1990.
NIST MS number 114991

All mass spectra in this site (plus many more) are available from the NIST/EPA/NIH Mass Spectral Library. Please see the following for information about the library and its accompanying search program.


References

Go To: Top, Phase change data, IR Spectrum, Mass spectrum (electron ionization), Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Plato, 1972
Plato, C., DSC as a general method for determining purity and heat of fusion of high-purity organic chemicals, Anal. Chem., 1972, 44, 1531. [all data]

Plato and Glasgow, 1969
Plato, C.; Glasgow, A.R., Jr., Differential scanning calorimetry as a general method for determining the purity and heat of fusion of high-purity organic chemicals. Application to 95 compounds, Anal. Chem., 1969, 41, 2, 330, https://doi.org/10.1021/ac60271a041 . [all data]

Hinckley, Bidleman, et al., 1990
Hinckley, Daniel A.; Bidleman, Terry F.; Foreman, William T.; Tuschall, Jack R., Determination of vapor pressures for nonpolar and semipolar organic compounds from gas chromatograhic retention data, J. Chem. Eng. Data, 1990, 35, 3, 232-237, https://doi.org/10.1021/je00061a003 . [all data]

Rodante, Vecchio, et al., 2000
Rodante, F.; Vecchio, S.; Catalani, G.; Guidotti, M., Journal of Thermal Analysis and Calorimetry, 2000, 60, 2, 605-622, https://doi.org/10.1023/A:1010159424733 . [all data]

Ksia«807»azczak and Nagata, 1995
Ksia«807»azczak, A.; Nagata, I., Crystal-plastic and plastic-liquid phase transitions, and purity determination, Thermochimica Acta, 1995, 254, 31-39, https://doi.org/10.1016/0040-6031(94)02032-J . [all data]


Notes

Go To: Top, Phase change data, IR Spectrum, Mass spectrum (electron ionization), References