{
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      "max_abs_error": 32.463675277348784,
      "max_abs_error_units": "J/mol",
      "type": "rational_polynomial"
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        "cL": [
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  "INFO": {
    "2DPNG_URL": "http://www.chemspider.com/ImagesHandler.ashx?id=22407",
    "ALIASES": [
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      "R740",
      "Ar"
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    "CAS": "7440-37-1",
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    "ENVIRONMENTAL": {
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    "FORMULA": "Ar_{1}",
    "INCHI_KEY": "XKRFYHLGVUSROY-UHFFFAOYSA-N",
    "INCHI_STRING": "InChI=1S/Ar",
    "NAME": "Argon",
    "REFPROP_NAME": "ARGON",
    "SMILES": "[Ar]"
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  "TRANSPORT": {
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        "type": "collision_integral"
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      "epsilon_over_k": 143.2,
      "epsilon_over_k_units": "K",
      "higher_order": {
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        "rhomolar_reduce": 13407.43,
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        "type": "modified_Batschinski_Hildebrand"
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      "sigma_eta": 3.35e-10,
      "sigma_eta_units": "m"
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}