{
  "ALIASES": [
    "ethylene", 
    "ETHYLENE"
  ], 
  "ANCILLARIES": {
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        -8.045029788728151e-13
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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": 128.05207220646753, 
      "max_abs_error_units": "J/mol", 
      "type": "rational_polynomial"
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        1.3297951916073798e-06, 
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        1.894668975229896e-12
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      "B": [
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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": 296.8987137904743, 
      "max_abs_error_units": "J/mol", 
      "type": "rational_polynomial"
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    "melting_line": {
      "BibTeX": "Smukala-JPCRD-2000", 
      "T_m": 169, 
      "parts": [
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          "T_0": 103.989, 
          "T_max": 110.369, 
          "T_min": 103.989, 
          "a": [
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          "p_0": 122.65, 
          "t": [
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        {
          "T_0": 110.369, 
          "T_max": 188, 
          "T_min": 110.369, 
          "a": [
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          "p_0": 46800000.0, 
          "t": [
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      "type": "polynomial_in_Tr"
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      "Tmax": 282.3499999999994, 
      "Tmin": 103.98900000000002, 
      "description": "p' = pc*exp(Tc/T*sum(n_i*theta^t_i))", 
      "max_abserror_percentage": 0.012820987213224555, 
      "n": [
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        119.37497252523112, 
        -0.6700941331427409, 
        -1.4552049349494574, 
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        1.8286241499129299
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      "reducing_value": 5041800.0, 
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        4.252, 
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        7.077
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      "type": "pL", 
      "using_tau_r": true
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      "Tmax": 282.3499999999994, 
      "Tmin": 103.98900000000002, 
      "description": "p'' = pc*exp(Tc/T*sum(n_i*theta^t_i))", 
      "max_abserror_percentage": 0.012376938726232911, 
      "n": [
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        -2.5188888709008195, 
        -34.95537683446643, 
        6.643870978349449
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      "reducing_value": 5041800.0, 
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        1.082, 
        18.676
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      "type": "pV", 
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      "Tmax": 282.3499999999994, 
      "Tmin": 103.98900000000002, 
      "description": "rho' = rhoc*(1+sum(n_i*theta^t_i))", 
      "max_abserror_percentage": 0.08567503686368605, 
      "n": [
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        0.7268516869915771, 
        -1.717280185311927, 
        1686.1315441396878, 
        -3729.1628980234227, 
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      "reducing_value": 7636.76598074554, 
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      "type": "rhoLnoexp", 
      "using_tau_r": false
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    "rhoV": {
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      "Tmax": 282.3499999999994, 
      "Tmin": 103.98900000000002, 
      "description": "rho'' = rhoc*exp(Tc/T*sum(n_i*theta^t_i))", 
      "max_abserror_percentage": 0.5959122914985127, 
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      "type": "rhoV", 
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      "_note": "coefficients are in increasing order; input in K, output in J/mol/K; value is entropy minus hs_anchor entropy", 
      "max_abs_error": 0.4375590884614926, 
      "max_abs_error_units": "J/mol/K", 
      "type": "rational_polynomial"
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      "_note": "coefficients are in increasing order; input in K, output in J/mol/K; value is entropy minus hs_anchor entropy", 
      "max_abs_error": 1.1623534754646103, 
      "max_abs_error_units": "J/mol/K", 
      "type": "rational_polynomial"
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    "surface_tension": {
      "BibTeX": "Mulero-JPCRD-2012", 
      "Tc": 282.35, 
      "a": [
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      "description": "sigma = sum(a_i*(1-T/Tc)^n_i)", 
      "n": [
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  "CAS": "74-85-1", 
  "ENVIRONMENTAL": {
    "ASHRAE34": "A3", 
    "FH": 4, 
    "GWP100": 6.8, 
    "GWP20": -1.0, 
    "GWP500": -1.0, 
    "HH": 2, 
    "Name": "Ethylene", 
    "ODP": -1.0, 
    "PH": 2
  }, 
  "EOS": [
    {
      "BibTeX_CP0": "", 
      "BibTeX_EOS": "Smukala-JPCRD-2000", 
      "STATES": {
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          "hmolar": -5076.989576728211, 
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          "rhomolar": 6873.089382670986, 
          "rhomolar_units": "mol/m^3", 
          "smolar": -48.714546055509636, 
          "smolar_units": "J/mol/K"
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        "reducing": {
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          "p": 5041800, 
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        "sat_min_liquid": {
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          "rhomolar": 23333.806692211565, 
          "rhomolar_units": "mol/m^3"
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        "sat_min_vapor": {
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          "p": 0.1220267638428971, 
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          "rhomolar": 0.1411618295576975, 
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      "T_max": 450, 
      "T_max_units": "K", 
      "Ttriple": 103.989, 
      "Ttriple_units": "K", 
      "accentric": 0.0866, 
      "accentric_units": "-", 
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          "type": "IdealGasHelmholtzLead"
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        {
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        {
          "n": [
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          "type": "IdealGasHelmholtzPlanckEinstein"
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          "type": "IdealGasHelmholtzEnthalpyEntropyOffset"
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          "type": "ResidualHelmholtzPower"
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        {
          "beta": [
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          "d": [
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          "epsilon": [
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          "eta": [
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          "gamma": [
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          "n": [
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          "type": "ResidualHelmholtzGaussian"
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      "gas_constant": 8.31451, 
      "gas_constant_units": "J/mol/K", 
      "molar_mass": 0.02805376, 
      "molar_mass_units": "kg/mol", 
      "p_max": 300000000, 
      "p_max_units": "Pa", 
      "pseudo_pure": false
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  ], 
  "NAME": "Ethylene", 
  "REFPROP_NAME": "ETHYLENE", 
  "STATES": {
    "critical": {
      "T": 282.35, 
      "T_units": "K", 
      "p": 5041800.0, 
      "p_units": "Pa", 
      "rhomolar": 7636.76598074554, 
      "rhomolar_units": "mol/m^3"
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    "triple_liquid": {
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      "rhomolar_units": "mol/m^3"
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    "triple_vapor": {
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      "p": 0.1220267638428971, 
      "p_units": "Pa", 
      "rhomolar": 0.1411618295576975, 
      "rhomolar_units": "mol/m^3"
    }
  }
}