{
  "ANCILLARIES": {
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        -7064.620260354418,
        79.16613042816307,
        -0.47766976664107463,
        0.0017192338210446272,
        -3.701275690807286e-06,
        4.410205058962832e-09,
        -2.244329199846041e-12
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      "B": [
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        -0.002702653004540113
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      "Tmax": 367.75,
      "Tmin": 220.0,
      "_note": "coefficients are in increasing order; input in K, output in J/mol; value is enthalpy minus hs_anchor enthalpy",
      "max_abs_error": 165.7888625056321,
      "max_abs_error_units": "J/mol",
      "type": "rational_polynomial"
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    "hLV": {
      "A": [
        -570120.1484197119,
        15147.697959307017,
        -165.61014120991328,
        0.9958047945826846,
        -0.0035785199472005043,
        7.689873720882333e-06,
        -9.151835132244599e-09,
        4.656684588471939e-12
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      "B": [
        1,
        -0.0027000726699845175
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      "Tmax": 367.75,
      "Tmin": 220.0,
      "_note": "coefficients are in increasing order; input in K, output in J/mol; value is enthalpy minus hs_anchor enthalpy",
      "max_abs_error": 402.5377116316065,
      "max_abs_error_units": "J/mol",
      "type": "rational_polynomial"
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    "pS": {
      "T_r": 367.85,
      "Tmax": 367.8499999999992,
      "Tmin": 220.0,
      "description": "p' = pc*exp(Tc/T*sum(n_i*theta^t_i))",
      "max_abserror_percentage": 0.006853694086594864,
      "n": [
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        -6.7020534970313275,
        -3.9344883544124443,
        39309.745547798695,
        18.183182049398066,
        -3883.103380695622
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      "reducing_value": 3382200.0,
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        0.961,
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        17.277,
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        14.02
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      "type": "pL",
      "using_tau_r": true
    },
    "rhoL": {
      "T_r": 367.85,
      "Tmax": 367.8499999999992,
      "Tmin": 220.0,
      "description": "rho' = rhoc*(1+sum(n_i*theta^t_i))",
      "max_abserror_percentage": 0.3992123482188248,
      "n": [
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        20.18646332917161,
        -160.37050775728997,
        147.68109685289284,
        -63578.64918999199
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      "reducing_value": 4170.0,
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        2.484,
        2.593,
        16.586
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      "type": "rhoLnoexp",
      "using_tau_r": false
    },
    "rhoV": {
      "T_r": 367.85,
      "Tmax": 367.8499999999992,
      "Tmin": 220.0,
      "description": "rho'' = rhoc*exp(Tc/T*sum(n_i*theta^t_i))",
      "max_abserror_percentage": 0.332050058237221,
      "n": [
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        2.612924555839616,
        -26.216566273272992,
        115.70400813769207,
        -101.3078910128961,
        9.031472717572315
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      "reducing_value": 4170.0,
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      "type": "rhoV",
      "using_tau_r": true
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        4.323172584621629e-06,
        -9.376997720415709e-09,
        1.1235338183077166e-11,
        -5.742166546136361e-15
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      "B": [
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        -0.0027032448069045432
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      "Tmax": 367.75,
      "Tmin": 220.0,
      "_note": "coefficients are in increasing order; input in K, output in J/mol/K; value is entropy minus hs_anchor entropy",
      "max_abs_error": 0.4388358289967158,
      "max_abs_error_units": "J/mol/K",
      "type": "rational_polynomial"
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    "sLV": {
      "A": [
        -772.270169640045,
        28.027619724897413,
        -0.34420770911100323,
        0.0021922623878138092,
        -8.147733782709826e-06,
        1.790015200044322e-08,
        -2.1638383604766276e-11,
        1.1136866702493994e-14
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      "B": [
        1,
        -0.0027004272124359035
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      "Tmax": 367.75,
      "Tmin": 220.0,
      "_note": "coefficients are in increasing order; input in K, output in J/mol/K; value is entropy minus hs_anchor entropy",
      "max_abs_error": 1.0811856688804422,
      "max_abs_error_units": "J/mol/K",
      "type": "rational_polynomial"
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    "surface_tension": {
      "BibTeX": "Mulero-JPCRD-2012",
      "Tc": 367.85,
      "a": [
        0.06274
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      "description": "sigma = sum(a_i*(1-T/Tc)^n_i)",
      "n": [
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    }
  },
  "EOS": [
    {
      "BibTeX_CP0": "",
      "BibTeX_EOS": "Richter-JCED-2011",
      "STATES": {
        "hs_anchor": {
          "T": 404.63500000000005,
          "T_units": "K",
          "hmolar": 48232.026932563014,
          "hmolar_units": "J/mol",
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          "rhomolar": 3753.0,
          "rhomolar_units": "mol/m^3",
          "smolar": 186.35382399002881,
          "smolar_units": "J/mol/K"
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        "reducing": {
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          "p": 3382200,
          "p_units": "Pa",
          "rhomolar": 4170,
          "rhomolar_units": "mol/m^3",
          "smolar": 172.07304302572015,
          "smolar_units": "J/mol/K"
        },
        "sat_min_liquid": {
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          "T_units": "K",
          "hmolar": 15520.183697391298,
          "hmolar_units": "J/mol",
          "p": 31507.558848475514,
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          "rhomolar": 11633.107308831428,
          "rhomolar_units": "mol/m^3",
          "smolar": 84.54897749603592,
          "smolar_units": "J/mol/K"
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        "sat_min_vapor": {
          "T": 220.0,
          "T_units": "K",
          "hmolar": 37376.03203521745,
          "hmolar_units": "J/mol",
          "p": 31507.558848475514,
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          "rhomolar_units": "mol/m^3",
          "smolar": 183.89370628814143,
          "smolar_units": "J/mol/K"
        }
      },
      "T_max": 410,
      "T_max_units": "K",
      "Ttriple": 220,
      "Ttriple_units": "K",
      "acentric": 0.276,
      "acentric_units": "-",
      "alpha0": [
        {
          "a1": -12.837928,
          "a2": 8.042605,
          "type": "IdealGasHelmholtzLead"
        },
        {
          "a": 4.944,
          "type": "IdealGasHelmholtzLogTau"
        },
        {
          "n": [
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            2.03,
            7.455
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            12.13809976892755,
            4.770966426532554
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          "type": "IdealGasHelmholtzPlanckEinstein"
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      "alphar": [
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            1,
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          "l": [
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            2,
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            1
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          "t": [
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          "type": "ResidualHelmholtzPower"
        },
        {
          "beta": [
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            0.89,
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            108
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          "d": [
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          "epsilon": [
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          "eta": [
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            1.055,
            5.84,
            16.2
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          "gamma": [
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          "n": [
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          "t": [
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          "type": "ResidualHelmholtzGaussian"
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      ],
      "critical_region_splines": {
        "T_max": 367.85,
        "T_min": 367.84983035809745,
        "_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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          367.8803614481557
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        "cV": [
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          7.273842039048367e-06,
          367.8196680786972
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        "rhomolar_max": 4193.299505682264,
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      "gas_constant": 8.314472,
      "gas_constant_units": "J/mol/K",
      "molar_mass": 0.1140415928,
      "molar_mass_units": "kg/mol",
      "p_max": 30000000,
      "p_max_units": "Pa",
      "pseudo_pure": false
    }
  ],
  "INFO": {
    "2DPNG_URL": "http://www.chemspider.com/ImagesHandler.ashx?id=2057041",
    "ALIASES": [
      "R1234YF"
    ],
    "CAS": "754-12-1",
    "CHEMSPIDER_ID": 2057041,
    "ENVIRONMENTAL": {
      "ASHRAE34": "A2L",
      "FH": 2,
      "GWP100": 4.0,
      "GWP20": -1.0,
      "GWP500": -1.0,
      "HH": 1,
      "Name": "R1234yf",
      "ODP": -1.0,
      "PH": 0
    },
    "FORMULA": "C_{3}F_{4}H_{2}",
    "INCHI_KEY": "FXRLMCRCYDHQFW-UHFFFAOYSA-N",
    "INCHI_STRING": "InChI=1S/C3H2F4/c1-2(4)3(5,6)7/h1H2",
    "NAME": "R1234yf",
    "REFPROP_NAME": "R1234YF",
    "SMILES": "C=C(C(F)(F)F)F"
  },
  "STATES": {
    "critical": {
      "T": 367.85,
      "T_units": "K",
      "hmolar": 42144.616087058115,
      "hmolar_units": "J/mol",
      "p": 3382200.0,
      "p_units": "Pa",
      "rhomolar": 4170.0,
      "rhomolar_units": "mol/m^3",
      "smolar": 172.05987191715886,
      "smolar_units": "J/mol/K"
    },
    "triple_liquid": {
      "T": 220.0,
      "T_units": "K",
      "hmolar": 15520.183697391298,
      "hmolar_units": "J/mol",
      "p": 31507.558848475514,
      "p_units": "Pa",
      "rhomolar": 11633.107308831428,
      "rhomolar_units": "mol/m^3",
      "smolar": 84.54897749603592,
      "smolar_units": "J/mol/K"
    },
    "triple_vapor": {
      "T": 220.0,
      "T_units": "K",
      "hmolar": 37376.03203521745,
      "hmolar_units": "J/mol",
      "p": 31507.558848475514,
      "p_units": "Pa",
      "rhomolar": 17.583605761936976,
      "rhomolar_units": "mol/m^3",
      "smolar": 183.89370628814143,
      "smolar_units": "J/mol/K"
    }
  },
  "TRANSPORT": {
    "conductivity": {
      "BibTeX": "Perkins-JCED-2011",
      "critical": {
        "GAMMA": 0.0496,
        "R0": 1.03,
        "gamma": 1.239,
        "qD": 1713796058.2,
        "type": "simplified_Olchowy_Sengers",
        "zeta0": 1.94e-10
      },
      "dilute": {
        "A": [
          -0.0102778,
          0.0291098,
          0.000860643
        ],
        "B": [
          1.0
        ],
        "T_reducing": 367.85,
        "T_reducing_units": "K",
        "m": [
          0
        ],
        "n": [
          0,
          1,
          2
        ],
        "type": "ratio_of_polynomials"
      },
      "residual": {
        "B": [
          -0.0368219,
          0.0883226,
          -0.0705909,
          0.0259026,
          -0.0032295,
          0.0397166,
          -0.077239,
          0.0664707,
          -0.0249071,
          0.00336228
        ],
        "T_reducing": 367.85,
        "T_reducing_units": "K",
        "d": [
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          2,
          3,
          4,
          5,
          1,
          2,
          3,
          4,
          5
        ],
        "rhomass_reducing": 475.55,
        "rhomass_reducing_units": "kg/m^3",
        "t": [
          0,
          0,
          0,
          0,
          0,
          -1,
          -1,
          -1,
          -1,
          -1
        ],
        "type": "polynomial"
      }
    },
    "viscosity": [
      {
        "BibTeX": "Bell-PURDUE-2016-ETA",
        "C": 0.87302,
        "c_liq": [
          0.6100913843,
          0.4508958312,
          -0.017063,
          0.000564
        ],
        "c_vap": [
          0.0,
          1.2,
          -0.308598,
          0.035317
        ],
        "rhosr_critical": -54468.47741433059,
        "type": "rhosr-CS",
        "x_crossover": 2
      },
      {
        "BibTeX": "BELL-PERSONAL-2015",
        "_note": "Fit based on the data of Zhao, JCED, 2014: doi: 10.1021/je5001457",
        "epsilon_over_k": 281.14,
        "epsilon_over_k_units": "K",
        "psi": {
          "a": [
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            0.74500256,
            -0.16912621
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          "rhomolar_reducing": 4170.0,
          "rhomolar_reducing_units": "mol/m^3",
          "t": [
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            1,
            2
          ]
        },
        "reference_fluid": "R134a",
        "sigma_eta": 5.328e-10,
        "sigma_eta_units": "m",
        "type": "ECS"
      }
    ]
  }
}