{
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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": 54.05987083437981,
      "max_abs_error_units": "J/mol",
      "type": "rational_polynomial"
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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": 126.54385503980097,
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      "type": "rational_polynomial"
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      "description": "sigma = sum(a_i*(1-T/Tc)^n_i)",
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      "BibTeX_CP0": "",
      "BibTeX_EOS": "Setzmann-JPCRD-1991",
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        "sat_min_liquid": {
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        "sat_min_vapor": {
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      "Ttriple_units": "K",
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        {
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        {
          "Tcrit": 190.564,
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        {
          "beta": [
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          "gamma": [
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          "type": "ResidualHelmholtzGaussian"
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      ],
      "critical_region_splines": {
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        "T_min": 190.5639673093741,
        "_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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        "cV": [
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      "gas_constant": 8.31451,
      "gas_constant_units": "J/mol/K",
      "molar_mass": 0.0160428,
      "molar_mass_units": "kg/mol",
      "p_max": 1000000000,
      "p_max_units": "Pa",
      "pseudo_pure": false
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  ],
  "INFO": {
    "2DPNG_URL": "http://www.chemspider.com/ImagesHandler.ashx?id=291",
    "ALIASES": [
      "CH4",
      "methane",
      "METHANE",
      "R50",
      "n-C1H4"
    ],
    "CAS": "74-82-8",
    "CHEMSPIDER_ID": 291,
    "ENVIRONMENTAL": {
      "ASHRAE34": "A3",
      "FH": 4,
      "GWP100": 25.0,
      "GWP20": 72.0,
      "GWP500": 7.6,
      "HH": 0,
      "Name": "Methane",
      "ODP": -1.0,
      "PH": 0
    },
    "FORMULA": "C_{1}H_{4}",
    "INCHI_KEY": "VNWKTOKETHGBQD-UHFFFAOYSA-N",
    "INCHI_STRING": "InChI=1S/CH4/h1H4",
    "NAME": "Methane",
    "REFPROP_NAME": "METHANE",
    "SMILES": "C"
  },
  "STATES": {
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      "T": 190.564,
      "T_units": "K",
      "hmolar": 6667.234961434366,
      "hmolar_units": "J/mol",
      "p": 4599200.0,
      "p_units": "Pa",
      "rhomolar": 10139.128,
      "rhomolar_units": "mol/m^3",
      "smolar": 41.108753830526176,
      "smolar_units": "J/mol/K"
    },
    "triple_liquid": {
      "T": 90.6941,
      "T_units": "K",
      "hmolar": -1152.195338748396,
      "hmolar_units": "J/mol",
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      "p_units": "Pa",
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      "rhomolar_units": "mol/m^3",
      "smolar": -11.389445537386989,
      "smolar_units": "J/mol/K"
    },
    "triple_vapor": {
      "T": 90.6941,
      "T_units": "K",
      "hmolar": 7579.304080614051,
      "hmolar_units": "J/mol",
      "p": 11696.066112170545,
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      "rhomolar": 15.629694499289354,
      "rhomolar_units": "mol/m^3",
      "smolar": 84.8847254570935,
      "smolar_units": "J/mol/K"
    }
  },
  "TRANSPORT": {
    "conductivity": {
      "BibTeX": "Friend-JPCRD-1989",
      "hardcoded": "Methane"
    },
    "viscosity": {
      "BibTeX": "QuinonesCisneros-JPCB-2006",
      "dilute": {
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        "a": [
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        "t": [
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        "type": "powers_of_Tr"
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      "epsilon_over_k": 148.6,
      "epsilon_over_k_units": "K",
      "higher_order": {
        "Aa": [
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        ],
        "Aaa": [
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        ],
        "Adrdr": [
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        ],
        "Ai": [
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        ],
        "Aii": [
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        ],
        "Ar": [
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        ],
        "Na": 1,
        "Naa": 3,
        "Nii": 3,
        "Nr": 1,
        "Nrr": 3,
        "T_reduce": 190.564,
        "c1": 1,
        "c2": 1,
        "type": "friction_theory"
      },
      "sigma_eta": 3.758e-10,
      "sigma_eta_units": "m"
    }
  }
}