{
  "ALIASES": [
    "hydrogen", 
    "HYDROGEN", 
    "H2", 
    "R702"
  ], 
  "ANCILLARIES": {
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        -68.23570454720677, 
        15.249674180289597, 
        -1.2300698056000563, 
        0.058529662945307155, 
        -0.0016609827367442636, 
        2.5919897026030797e-05, 
        -1.7254341759822924e-07
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      "B": [
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        -0.02977474989640244
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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": 2.0210366452166113, 
      "max_abs_error_units": "J/mol", 
      "type": "rational_polynomial"
    }, 
    "hLV": {
      "A": [
        30.51248182737967, 
        247.53479480263672, 
        -38.46042157651256, 
        3.0854927161031633, 
        -0.14916297678082863, 
        0.004269429404075875, 
        -6.685502521045575e-05, 
        4.447592981670229e-07
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      "B": [
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        -0.02975047138698977
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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": 4.3658130771369486, 
      "max_abs_error_units": "J/mol", 
      "type": "rational_polynomial"
    }, 
    "melting_line": {
      "BibTeX": "Datchi-PRB-2000", 
      "T_m": 14.009985, 
      "parts": [
        {
          "T_0": 1, 
          "T_max": 700, 
          "T_min": 13.957, 
          "a": 231000.0, 
          "c": 1.7627, 
          "p_0": -236200.0
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      ], 
      "type": "Simon"
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    "pL": {
      "T_r": 33.145, 
      "Tmax": 33.144999999999925, 
      "Tmin": 13.957000000000011, 
      "description": "p' = pc*exp(Tc/T*sum(n_i*theta^t_i))", 
      "max_abserror_percentage": 0.01630156085371537, 
      "n": [
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        -0.13186072974088692, 
        3.0474002305782255, 
        -3.0615550520928423, 
        -0.302424110535371, 
        1.7087746430267654
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      "reducing_value": 1296400.0, 
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        2.009, 
        2.408, 
        8.137, 
        2.924
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      "type": "pL", 
      "using_tau_r": true
    }, 
    "pV": {
      "T_r": 33.145, 
      "Tmax": 33.144999999999925, 
      "Tmin": 13.957000000000011, 
      "description": "p'' = pc*exp(Tc/T*sum(n_i*theta^t_i))", 
      "max_abserror_percentage": 0.006522036925715735, 
      "n": [
        -0.5553870929135406, 
        -7.0852972599030295, 
        0.006868538454095541, 
        0.8295514415153659, 
        -0.08773773693832483, 
        3.754274235303921
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      "reducing_value": 1296400.0, 
      "t": [
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        1.072, 
        1.355, 
        2.61, 
        8.191, 
        1.239
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      "type": "pV", 
      "using_tau_r": true
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    "rhoL": {
      "T_r": 33.145, 
      "Tmax": 33.144999999999925, 
      "Tmin": 13.957000000000011, 
      "description": "rho' = rhoc*(1+sum(n_i*theta^t_i))", 
      "max_abserror_percentage": 0.8323321588331933, 
      "n": [
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        -5.715534926385584, 
        714.2366728890577, 
        -1666.5447521212081, 
        2698.8598951804593, 
        -12755.576112629806
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      "reducing_value": 15508.0, 
      "t": [
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        3.401, 
        7.095, 
        8.095, 
        10.911, 
        17.353
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      "type": "rhoLnoexp", 
      "using_tau_r": false
    }, 
    "rhoV": {
      "T_r": 33.145, 
      "Tmax": 33.144999999999925, 
      "Tmin": 13.957000000000011, 
      "description": "rho'' = rhoc*exp(Tc/T*sum(n_i*theta^t_i))", 
      "max_abserror_percentage": 0.5551328985772819, 
      "n": [
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        -773.9211864728516, 
        1530.809493601263, 
        -3087.995404817007, 
        3472.491545729249, 
        -15649.585518005188
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      "reducing_value": 15508.0, 
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        7.083, 
        9.094, 
        10.577, 
        19.579
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      "type": "rhoV", 
      "using_tau_r": true
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        1.6779281633607146, 
        0.13237321337246155, 
        -0.017531886228168106, 
        0.000982339548828489, 
        -3.064994864833041e-05, 
        5.109027628324171e-07, 
        -3.5724235387793366e-09
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      "B": [
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        -0.029776933730410602
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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": 0.06074599160459293, 
      "max_abs_error_units": "J/mol/K", 
      "type": "rational_polynomial"
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        3.5299115113770085, 
        -0.17937149104013894, 
        0.005528475446941292, 
        -9.854548000056829e-05, 
        8.876804852977444e-07, 
        -2.642552997005777e-09
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        -0.029737725256254614
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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": 0.13803268197285679, 
      "max_abs_error_units": "J/mol/K", 
      "type": "rational_polynomial"
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    "surface_tension": {
      "BibTeX": "Mulero-JPCRD-2012", 
      "Tc": 33.145, 
      "a": [
        -1.4165, 
        0.746383, 
        0.675625
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      "description": "sigma = sum(a_i*(1-T/Tc)^n_i)", 
      "n": [
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        0.659804, 
        0.619149
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  }, 
  "CAS": "1333-74-0", 
  "ENVIRONMENTAL": {
    "ASHRAE34": "A3", 
    "FH": 4, 
    "GWP100": -1.0, 
    "GWP20": -1.0, 
    "GWP500": -1.0, 
    "HH": 0, 
    "Name": "Hydrogen", 
    "ODP": -1.0, 
    "PH": 0
  }, 
  "EOS": [
    {
      "BibTeX_CP0": "", 
      "BibTeX_EOS": "Leachman-JPCRD-2009", 
      "STATES": {
        "hs_anchor": {
          "T": 36.459500000000006, 
          "T_units": "K", 
          "hmolar": 737.4108456147343, 
          "hmolar_units": "J/mol", 
          "p": 1860910.8658656576, 
          "p_units": "Pa", 
          "rhomolar": 13957.2, 
          "rhomolar_units": "mol/m^3", 
          "smolar": 22.261377663199617, 
          "smolar_units": "J/mol/K"
        }, 
        "reducing": {
          "T": 33.145, 
          "T_units": "K", 
          "p": 1296400, 
          "p_units": "Pa", 
          "rhomolar": 15508, 
          "rhomolar_units": "mol/m^3"
        }, 
        "sat_min_liquid": {
          "T": 13.957, 
          "T_units": "K", 
          "p": 7.357828141690358, 
          "p_units": "Pa", 
          "rhomolar": 38198.54161031631, 
          "rhomolar_units": "mol/m^3"
        }, 
        "sat_min_vapor": {
          "T": 13.957, 
          "T_units": "K", 
          "p": 7.357828141690358, 
          "p_units": "Pa", 
          "rhomolar": 64.41526917350258, 
          "rhomolar_units": "mol/m^3"
        }
      }, 
      "T_max": 1000, 
      "T_max_units": "K", 
      "Ttriple": 13.957, 
      "Ttriple_units": "K", 
      "accentric": -0.219, 
      "accentric_units": "-", 
      "alpha0": [
        {
          "a1": -1.4579856475, 
          "a2": 1.888076782, 
          "type": "IdealGasHelmholtzLead"
        }, 
        {
          "a": 1.5, 
          "type": "IdealGasHelmholtzLogTau"
        }, 
        {
          "n": [
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            -0.4117, 
            -0.792, 
            0.758, 
            1.217
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          "t": [
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            22.6580178006, 
            60.0090511389, 
            74.9434303817, 
            206.9392065168
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          "type": "IdealGasHelmholtzPlanckEinstein"
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      "alphar": [
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            1, 
            2, 
            2, 
            3, 
            1, 
            3
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          "l": [
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          "n": [
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          "type": "ResidualHelmholtzPower"
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        {
          "beta": [
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            0.3967
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          "d": [
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            3, 
            1, 
            1
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          "epsilon": [
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          "eta": [
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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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      "gas_constant": 8.314472, 
      "gas_constant_units": "J/mol/K", 
      "molar_mass": 0.00201588, 
      "molar_mass_units": "kg/mol", 
      "p_max": 2000000000, 
      "p_max_units": "Pa", 
      "pseudo_pure": false
    }
  ], 
  "NAME": "Hydrogen", 
  "REFPROP_NAME": "HYDROGEN", 
  "STATES": {
    "critical": {
      "T": 33.145, 
      "T_units": "K", 
      "p": 1296400.0, 
      "p_units": "Pa", 
      "rhomolar": 15508.0, 
      "rhomolar_units": "mol/m^3"
    }, 
    "triple_liquid": {
      "T": 13.957, 
      "T_units": "K", 
      "p": 7.357828141690358, 
      "p_units": "Pa", 
      "rhomolar": 38198.54161031631, 
      "rhomolar_units": "mol/m^3"
    }, 
    "triple_vapor": {
      "T": 13.957, 
      "T_units": "K", 
      "p": 7.357828141690358, 
      "p_units": "Pa", 
      "rhomolar": 64.41526917350258, 
      "rhomolar_units": "mol/m^3"
    }
  }, 
  "TRANSPORT": {
    "conductivity": {
      "BibTeX": "Assael-JPCRD-2011-Hydrogen", 
      "critical": {
        "GAMMA": 0.052, 
        "R0": 1.01, 
        "gamma": 1.2415, 
        "qD": 2500000000.0, 
        "type": "simplified_Olchowy_Sengers", 
        "zeta0": 1.5e-10
      }, 
      "dilute": {
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          -1.4508, 
          0.326394, 
          0.00316939, 
          0.000190592, 
          -1.139e-06
        ], 
        "B": [
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          -22.1878, 
          4.57151, 
          1.0
        ], 
        "T_reducing": 33.145, 
        "T_reducing_units": "K", 
        "m": [
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          1, 
          2, 
          3
        ], 
        "n": [
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          1, 
          2, 
          3, 
          4, 
          5, 
          6
        ], 
        "type": "ratio_of_polynomials"
      }, 
      "residual": {
        "B": [
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          0.0018337, 
          -0.0207629, 
          -0.00886716, 
          0.031481, 
          0.015826, 
          -0.0143097, 
          -0.0106283, 
          0.0017498, 
          0.00280673
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        "T_reducing": 33.145, 
        "T_reducing_units": "K", 
        "d": [
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          2, 
          2, 
          3, 
          3, 
          4, 
          4, 
          5, 
          5
        ], 
        "rhomass_reducing": 31.262, 
        "rhomass_reducing_units": "kg/m^3", 
        "t": [
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          0, 
          -1, 
          0, 
          -1, 
          0, 
          -1, 
          0, 
          -1
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        "type": "polynomial"
      }
    }, 
    "viscosity": {
      "BibTeX": "Muzny-JCED-2013", 
      "dilute": {
        "C": 2.1357e-08, 
        "a": [
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          -0.455274, 
          0.143602, 
          -0.0335325, 
          0.00276981
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        "molar_mass": 0.00201588, 
        "molar_mass_units": "kg/mol", 
        "t": [
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          2, 
          3, 
          4
        ], 
        "type": "collision_integral"
      }, 
      "epsilon_over_k": 30.41, 
      "epsilon_over_k_units": "K", 
      "higher_order": {
        "hardcoded": "Hydrogen"
      }, 
      "initial_density": {
        "b": [
          -0.187, 
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          3.7151, 
          -11.0972, 
          9.0965, 
          -3.8292, 
          0.5166
        ], 
        "t": [
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          -4, 
          -5, 
          -6
        ], 
        "type": "Rainwater-Friend"
      }, 
      "sigma_eta": 2.97e-10, 
      "sigma_eta_units": "m"
    }
  }
}