{
  "ALIASES": [
    "R152a"
  ], 
  "ANCILLARIES": {
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      "A": [
        -45305.71559643779, 
        53.51401320578066, 
        2.00883545829053, 
        -0.015898509238332817, 
        6.591597839566423e-05, 
        -1.607262490426485e-07, 
        2.144126693287112e-10, 
        -1.2188700797824842e-13
      ], 
      "B": [
        1, 
        -0.0025592202955858575
      ], 
      "_note": "coefficients are in increasing order; input in K, output in J/mol; value is enthalpy minus hs_anchor enthalpy", 
      "max_abs_error": 91.69058086613313, 
      "max_abs_error_units": "J/mol", 
      "type": "rational_polynomial"
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    "hLV": {
      "A": [
        22733.91269977933, 
        254.1312154935972, 
        -5.240611789623764, 
        0.03927075026993214, 
        -0.00016675426086586179, 
        4.1367098913821287e-07, 
        -5.600953925042822e-10, 
        3.2207785898679315e-13
      ], 
      "B": [
        1, 
        -0.0025535979815260483
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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": 195.5751885564846, 
      "max_abs_error_units": "J/mol", 
      "type": "rational_polynomial"
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    "pL": {
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      "Tmax": 386.4109999999993, 
      "Tmin": 154.56, 
      "description": "p' = pc*exp(Tc/T*sum(n_i*theta^t_i))", 
      "max_abserror_percentage": 0.12140204459119008, 
      "n": [
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        -6.995494450649338, 
        0.9348417755500018, 
        -3.706406451221934, 
        -66.08072669965013, 
        122.73360925177805
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      "reducing_value": 4520000.0, 
      "t": [
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        0.993, 
        1.692, 
        3.445, 
        15.803, 
        17.838
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      "type": "pL", 
      "using_tau_r": true
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    "pV": {
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      "Tmax": 386.4109999999993, 
      "Tmin": 154.56, 
      "description": "p'' = pc*exp(Tc/T*sum(n_i*theta^t_i))", 
      "max_abserror_percentage": 0.16059785174262764, 
      "n": [
        -8.058110929331818e-05, 
        -5.144477525553562, 
        -1.521963154763345, 
        -6.312478722604828, 
        5.544700008436013, 
        -111.12850271670084
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      "reducing_value": 4520000.0, 
      "t": [
        0.085, 
        0.94, 
        1.166, 
        4.638, 
        6.935, 
        17.582
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      "type": "pV", 
      "using_tau_r": true
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    "rhoL": {
      "T_r": 386.411, 
      "Tmax": 386.4109999999993, 
      "Tmin": 154.56, 
      "description": "rho' = rhoc*(1+sum(n_i*theta^t_i))", 
      "max_abserror_percentage": 2.482115019286124, 
      "n": [
        0.27636163699950356, 
        2.512764633534828, 
        162.80865128111427, 
        345.16760517849104, 
        -475.5953680253087, 
        -1773.7454734026196
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      "reducing_value": 5571.452362568319, 
      "t": [
        0.091, 
        0.499, 
        16.122, 
        16.122, 
        19.05, 
        19.528
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      "type": "rhoLnoexp", 
      "using_tau_r": false
    }, 
    "rhoV": {
      "T_r": 386.411, 
      "Tmax": 386.4109999999993, 
      "Tmin": 154.56, 
      "description": "rho'' = rhoc*exp(Tc/T*sum(n_i*theta^t_i))", 
      "max_abserror_percentage": 1.6145478143872904, 
      "n": [
        -24.05629942535681, 
        24.599913141549887, 
        -10.746520376686876, 
        5.86362610412505, 
        -3.7063275045589696, 
        -4.904962359487088
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      "reducing_value": 5571.452362568319, 
      "t": [
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        0.168, 
        0.621, 
        0.787, 
        2.442, 
        7.345
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      "type": "rhoV", 
      "using_tau_r": true
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    "sL": {
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        3.030099567693107, 
        -0.01535125851399278, 
        5.0702282746257766e-05, 
        -9.838859817428916e-08, 
        8.117554816238501e-11, 
        2.905350003769061e-14, 
        -7.15943064948408e-17
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      "B": [
        1, 
        -0.002559200860921293
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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": 0.23812692731203633, 
      "max_abs_error_units": "J/mol/K", 
      "type": "rational_polynomial"
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    "sLV": {
      "A": [
        1011.7924571758513, 
        -16.130898839259682, 
        0.12749683614789256, 
        -0.0006073861650631845, 
        1.8032244942225916e-06, 
        -3.2630430363759437e-09, 
        3.2883921873023413e-12, 
        -1.4068057842260756e-15
      ], 
      "B": [
        1, 
        -0.0025494206027800205
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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": 0.5754937382938383, 
      "max_abs_error_units": "J/mol/K", 
      "type": "rational_polynomial"
    }, 
    "surface_tension": {
      "BibTeX": "Mulero-JPCRD-2012", 
      "Tc": 386.411, 
      "a": [
        0.05808
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      "description": "sigma = sum(a_i*(1-T/Tc)^n_i)", 
      "n": [
        1.2115
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    }
  }, 
  "CAS": "75-37-6", 
  "ENVIRONMENTAL": {
    "ASHRAE34": "A2", 
    "FH": 4, 
    "GWP100": 124.0, 
    "GWP20": 437.0, 
    "GWP500": 38.0, 
    "HH": 1, 
    "Name": "R152A", 
    "ODP": -1.0, 
    "PH": 1
  }, 
  "EOS": [
    {
      "BibTeX_CP0": "", 
      "BibTeX_EOS": "Outcalt-JPCRD-1996-R152A", 
      "STATES": {
        "hs_anchor": {
          "T": 425.05210000000005, 
          "T_units": "K", 
          "hmolar": 36478.67647082188, 
          "hmolar_units": "J/mol", 
          "p": 7579325.696782108, 
          "p_units": "Pa", 
          "rhomolar": 5014.305, 
          "rhomolar_units": "mol/m^3", 
          "smolar": 129.8862036915725, 
          "smolar_units": "J/mol/K"
        }, 
        "reducing": {
          "T": 386.411, 
          "T_units": "K", 
          "p": 4520000, 
          "p_units": "Pa", 
          "rhomolar": 5571.45, 
          "rhomolar_units": "mol/m^3"
        }, 
        "sat_min_liquid": {
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          "p": 64.13864100682196, 
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          "rhomolar": 18060.71838709547, 
          "rhomolar_units": "mol/m^3"
        }, 
        "sat_min_vapor": {
          "T": 154.56, 
          "T_units": "K", 
          "p": 64.13859749741242, 
          "p_units": "Pa", 
          "rhomolar": 0.0499191135354104, 
          "rhomolar_units": "mol/m^3"
        }
      }, 
      "T_max": 471, 
      "T_max_units": "K", 
      "Ttriple": 154.56, 
      "Ttriple_units": "K", 
      "accentric": 0.275217114532099, 
      "accentric_units": "-", 
      "alpha0": [
        {
          "a1": 0, 
          "a2": 0, 
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        }, 
        {
          "a": -1, 
          "type": "IdealGasHelmholtzLogTau"
        }, 
        {
          "T0": 298.15, 
          "Tc": 386.411, 
          "c": [
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            0.0109864910678, 
            2.50161504325e-05, 
            -2.78744429549e-08
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          "t": [
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            3
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          "type": "IdealGasHelmholtzCP0PolyT"
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        {
          "a1": -14.5767531651083, 
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          "reference": "IIR", 
          "type": "IdealGasHelmholtzEnthalpyEntropyOffset"
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            3, 
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            3, 
            4, 
            5, 
            3, 
            4, 
            5, 
            3, 
            4, 
            5
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          "type": "ResidualHelmholtzPower"
        }
      ], 
      "critical_region_splines": {
        "T_max": 386.411, 
        "T_min": 386.41099999999204, 
        "_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": [
          0.0, 
          0.0, 
          -1.441541916647247e-09, 
          386.41100803148214
        ], 
        "cV": [
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          0.0, 
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          386.4109918843441
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        "rhomolar_max": 5571.457898124929, 
        "rhomolar_min": 5571.4469054491965
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      "gas_constant": 8.314471, 
      "gas_constant_units": "J/mol/K", 
      "molar_mass": 0.066051, 
      "molar_mass_units": "kg/mol", 
      "p_max": 58000000, 
      "p_max_units": "Pa", 
      "pseudo_pure": false
    }, 
    {
      "BibTeX_CP0": "TillnerRoth-IJT-1995", 
      "BibTeX_EOS": "Span-IJT-2003C", 
      "STATES": {
        "reducing": {
          "T": 386.411, 
          "T_units": "K", 
          "p": 4520000, 
          "p_units": "Pa", 
          "rhomolar": 5571.452362568319, 
          "rhomolar_units": "mol/m^3"
        }, 
        "sat_min_liquid": {
          "T": 154.56, 
          "T_units": "K", 
          "p": 0.06408986801291847, 
          "p_units": "Pa", 
          "rhomolar": 18031.095642133463, 
          "rhomolar_units": "mol/m^3"
        }, 
        "sat_min_vapor": {
          "T": 154.56, 
          "T_units": "K", 
          "p": 0.06408986801291847, 
          "p_units": "Pa", 
          "rhomolar": 0.04989056799859409, 
          "rhomolar_units": "mol/m^3"
        }
      }, 
      "T_max": 471, 
      "T_max_units": "K", 
      "Ttriple": 154.56, 
      "Ttriple_units": "K", 
      "accentric": 0.275217114532099, 
      "accentric_units": "-", 
      "alpha0": [
        {
          "a1": 10.87227, 
          "a2": 6.839515, 
          "type": "IdealGasHelmholtzLead"
        }, 
        {
          "a": -1, 
          "type": "IdealGasHelmholtzLogTau"
        }, 
        {
          "n": [
            -20.78887, 
            -0.6539092, 
            0.03342831
          ], 
          "t": [
            -0.25, 
            -2, 
            -4
          ], 
          "type": "IdealGasHelmholtzPower"
        }, 
        {
          "a1": -0.00575158142139323, 
          "a2": 0.00491802084015653, 
          "reference": "IIR", 
          "type": "IdealGasHelmholtzEnthalpyEntropyOffset"
        }
      ], 
      "alphar": [
        {
          "d": [
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            3, 
            7, 
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            5, 
            1, 
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            4, 
            2
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          "l": [
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            2, 
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          ], 
          "n": [
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            -0.23848654, 
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            -0.073103558, 
            -0.015538724
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          "t": [
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            4.75, 
            12.5
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          "type": "ResidualHelmholtzPower"
        }
      ], 
      "gas_constant": 8.31451, 
      "gas_constant_units": "J/mol/K", 
      "molar_mass": 0.066051, 
      "molar_mass_units": "kg/mol", 
      "p_max": 58000000, 
      "p_max_units": "Pa", 
      "pseudo_pure": false
    }
  ], 
  "NAME": "R152A", 
  "REFPROP_NAME": "R152A", 
  "STATES": {
    "critical": {
      "T": 386.411, 
      "T_units": "K", 
      "p": 4520000.0, 
      "p_units": "Pa", 
      "rhomolar": 5571.452362568319, 
      "rhomolar_units": "mol/m^3"
    }, 
    "triple_liquid": {
      "T": 154.56, 
      "T_units": "K", 
      "p": 64.13864100682196, 
      "p_units": "Pa", 
      "rhomolar": 18060.71838709547, 
      "rhomolar_units": "mol/m^3"
    }, 
    "triple_vapor": {
      "T": 154.56, 
      "T_units": "K", 
      "p": 64.13859749741242, 
      "p_units": "Pa", 
      "rhomolar": 0.0499191135354104, 
      "rhomolar_units": "mol/m^3"
    }
  }, 
  "TRANSPORT": {
    "conductivity": {
      "BibTeX": "Krauss-IJT-1996", 
      "critical": {
        "GAMMA": 0.0487, 
        "R0": 1.03, 
        "gamma": 1.239, 
        "qD": 2288329519.45, 
        "type": "simplified_Olchowy_Sengers", 
        "zeta0": 1.894e-10
      }, 
      "dilute": {
        "A": [
          -0.014942, 
          9.73283e-05
        ], 
        "B": [
          1.0
        ], 
        "T_reducing": 1, 
        "T_reducing_units": "K", 
        "m": [
          0
        ], 
        "n": [
          0, 
          1
        ], 
        "type": "ratio_of_polynomials"
      }, 
      "residual": {
        "B": [
          0.0106039395, 
          0.0136956435, 
          -0.0062916315, 
          0.0019794274499999997
        ], 
        "T_reducing": 386.411, 
        "T_reducing_units": "K", 
        "d": [
          1, 
          2, 
          3, 
          4
        ], 
        "rhomass_reducing": 368.0, 
        "rhomass_reducing_units": "kg/m^3", 
        "t": [
          0, 
          0, 
          0, 
          0
        ], 
        "type": "polynomial"
      }
    }, 
    "viscosity": {
      "BibTeX": "Krauss-IJT-1996", 
      "dilute": {
        "C": 2.6695992007227643e-08, 
        "a": [
          0.4425728, 
          -0.5138403, 
          0.1547566, 
          -0.02821844, 
          0.001578286
        ], 
        "molar_mass": 0.06605, 
        "molar_mass_units": "kg/mol", 
        "t": [
          0, 
          1, 
          2, 
          3, 
          4
        ], 
        "type": "collision_integral"
      }, 
      "epsilon_over_k": 354.84, 
      "epsilon_over_k_units": "K", 
      "higher_order": {
        "T_reduce": 386.411, 
        "T_reduce_units": "K", 
        "a": [
          -3.772282824e-06, 
          2.647627488e-05, 
          -1.578969e-05, 
          5.52346488e-06
        ], 
        "d1": [
          1, 
          2, 
          3, 
          4
        ], 
        "d2": [
          0
        ], 
        "f": [
          2.087674344e-05
        ], 
        "g": [
          2.91733
        ], 
        "gamma": [
          0, 
          0, 
          0, 
          0
        ], 
        "h": [
          0
        ], 
        "l": [
          1, 
          1, 
          1, 
          1
        ], 
        "p": [
          1
        ], 
        "q": [
          0
        ], 
        "rhomolar_reduce": 5571.536714610144, 
        "rhomolar_reduce_units": "mol/m^3", 
        "t1": [
          0, 
          0, 
          0, 
          0
        ], 
        "t2": [
          0
        ], 
        "type": "modified_Batschinski_Hildebrand"
      }, 
      "sigma_eta": 4.6115e-10, 
      "sigma_eta_units": "m"
    }
  }
}