{
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      "_note": "coefficients are in increasing order; input in K, output in J/mol; value is enthalpy minus hs_anchor enthalpy",
      "max_abs_error": 127.98736341940776,
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      "_note": "coefficients are in increasing order; input in K, output in J/mol; value is enthalpy minus hs_anchor enthalpy",
      "max_abs_error": 296.84005577153016,
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      "BibTeX": "Mulero-JPCRD-2012",
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      "description": "sigma = sum(a_i*(1-T/Tc)^n_i)",
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      "BibTeX_CP0": "",
      "BibTeX_EOS": "Smukala-JPCRD-2000",
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          "hmolar_units": "J/mol",
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        "sat_min_vapor": {
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      "Ttriple_units": "K",
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          "type": "IdealGasHelmholtzEnthalpyEntropyOffset"
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      "critical_region_splines": {
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        "T_min": 282.3497439583547,
        "_note": "Coefficients for the critical cubic spline.  T = c[0]*rho^3 + c[1]*rho^2 + c[2]*rho + c[3] with rho in mol/m^3 and T in K",
        "cL": [
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      "molar_mass": 0.02805376,
      "molar_mass_units": "kg/mol",
      "p_max": 300000000,
      "p_max_units": "Pa",
      "pseudo_pure": false
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  ],
  "INFO": {
    "2DPNG_URL": "http://www.chemspider.com/ImagesHandler.ashx?id=6085",
    "ALIASES": [
      "ethylene",
      "ETHYLENE",
      "R1150"
    ],
    "CAS": "74-85-1",
    "CHEMSPIDER_ID": 6085,
    "ENVIRONMENTAL": {
      "ASHRAE34": "A3",
      "FH": 4,
      "GWP100": 6.8,
      "GWP20": -1.0,
      "GWP500": -1.0,
      "HH": 2,
      "Name": "Ethylene",
      "ODP": -1.0,
      "PH": 2
    },
    "FORMULA": "C_{2}H_{4}",
    "INCHI_KEY": "VGGSQFUCUMXWEO-UHFFFAOYSA-N",
    "INCHI_STRING": "InChI=1S/C2H4/c1-2/h1-2H2",
    "NAME": "Ethylene",
    "REFPROP_NAME": "ETHYLENE",
    "SMILES": "C=C"
  },
  "STATES": {
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      "T": 282.35,
      "T_units": "K",
      "hmolar": 11205.622917124283,
      "hmolar_units": "J/mol",
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      "p_units": "Pa",
      "rhomolar": 7636.765980745539,
      "rhomolar_units": "mol/m^3",
      "smolar": 46.60945286278082,
      "smolar_units": "J/mol/K"
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    "triple_liquid": {
      "T": 103.989,
      "T_units": "K",
      "hmolar": -4434.994432546394,
      "hmolar_units": "J/mol",
      "p": 122.02676384261189,
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      "rhomolar_units": "mol/m^3",
      "smolar": -33.071691143071675,
      "smolar_units": "J/mol/K"
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    "triple_vapor": {
      "T": 103.989,
      "T_units": "K",
      "hmolar": 11485.96355892807,
      "hmolar_units": "J/mol",
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}