{
  "ALIASES": [
    "1Butene", 
    "1BUTENE", 
    "1-BUTENE", 
    "Butene"
  ], 
  "ANCILLARIES": {
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        276.3895788432645, 
        -0.4556294719385964, 
        0.0005448590605131313, 
        1.2516145076406193e-06, 
        -9.526152643502068e-09, 
        1.9017985573751808e-11, 
        -1.397210212093876e-14
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      "B": [
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        -0.0023586316163749
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      "Tmax": 419.19, 
      "Tmin": 87.80000000000001, 
      "_note": "coefficients are in increasing order; input in K, output in J/mol; value is enthalpy minus hs_anchor enthalpy", 
      "max_abs_error": 366.67818549046115, 
      "max_abs_error_units": "J/mol", 
      "type": "rational_polynomial"
    }, 
    "hLV": {
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        -148.26379219781109, 
        -0.12379624527510828, 
        0.0037870361372947504, 
        -2.0753383549120953e-05, 
        5.746706256812267e-08, 
        -8.29268239638596e-11, 
        5.04491903630254e-14
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      "B": [
        1, 
        -0.002352509742808477
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      "Tmax": 419.19, 
      "Tmin": 87.80000000000001, 
      "_note": "coefficients are in increasing order; input in K, output in J/mol; value is enthalpy minus hs_anchor enthalpy", 
      "max_abs_error": 827.9057180910843, 
      "max_abs_error_units": "J/mol", 
      "type": "rational_polynomial"
    }, 
    "pL": {
      "T_r": 419.29, 
      "Tmax": 419.2899999999993, 
      "Tmin": 87.80000000000001, 
      "description": "p' = pc*exp(Tc/T*sum(n_i*theta^t_i))", 
      "max_abserror_percentage": 0.015396951311941187, 
      "n": [
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        5.911539361818991, 
        -0.8939616477939638, 
        -2.3039589144938732, 
        -0.9566612009415151, 
        -1.297120238102156
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      "reducing_value": 4005100.0, 
      "t": [
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        1.176, 
        1.95, 
        3.798, 
        5.373, 
        16.675
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      "type": "pL", 
      "using_tau_r": true
    }, 
    "pV": {
      "T_r": 419.29, 
      "Tmax": 419.2899999999993, 
      "Tmin": 87.80000000000001, 
      "description": "p'' = pc*exp(Tc/T*sum(n_i*theta^t_i))", 
      "max_abserror_percentage": 0.0500335385506423, 
      "n": [
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        -6.023622095673614, 
        -9.978780101855465, 
        11.257196162885533, 
        -4.937156322143673, 
        -1.4911743361627807
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      "reducing_value": 4005100.0, 
      "t": [
        0.539, 
        0.946, 
        3.545, 
        3.783, 
        4.496, 
        18.106
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      "type": "pV", 
      "using_tau_r": true
    }, 
    "rhoL": {
      "T_r": 419.29, 
      "Tmax": 419.2899999999993, 
      "Tmin": 87.80000000000001, 
      "description": "rho' = rhoc*(1+sum(n_i*theta^t_i))", 
      "max_abserror_percentage": 0.24436140891674896, 
      "n": [
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        4.576996342937427, 
        -2.35398267961107, 
        1.6095202242190951, 
        1.9936948858619448, 
        -8.666711070126212
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      "reducing_value": 4240.0, 
      "t": [
        0.226, 
        0.326, 
        0.495, 
        0.869, 
        11.457, 
        19.823
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      "type": "rhoLnoexp", 
      "using_tau_r": false
    }, 
    "rhoV": {
      "T_r": 419.29, 
      "Tmax": 419.2899999999993, 
      "Tmin": 87.80000000000001, 
      "description": "rho'' = rhoc*exp(Tc/T*sum(n_i*theta^t_i))", 
      "max_abserror_percentage": 0.49395022045438663, 
      "n": [
        -3.302882573914376, 
        -1.9359137327823328, 
        -4.362721415165588, 
        24.301821574494937, 
        -191.8377573940649, 
        174.69349121901325
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      "reducing_value": 4240.0, 
      "t": [
        0.429, 
        1.081, 
        4.121, 
        15.125, 
        18.011, 
        18.807
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      "type": "rhoV", 
      "using_tau_r": true
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    "sL": {
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        4.8499447766106005, 
        -0.03643979086582648, 
        0.00018995939227416656, 
        -6.403090429739017e-07, 
        1.3241598536115771e-09, 
        -1.5294440445148199e-12, 
        7.541036096752338e-16
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      "B": [
        1, 
        -0.0023081187226997287
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      "Tmax": 419.19, 
      "Tmin": 87.80000000000001, 
      "_note": "coefficients are in increasing order; input in K, output in J/mol/K; value is entropy minus hs_anchor entropy", 
      "max_abs_error": 1.3772580659445026, 
      "max_abs_error_units": "J/mol/K", 
      "type": "rational_polynomial"
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      "A": [
        1440.3468469942832, 
        -28.103422570254793, 
        0.2762515905539237, 
        -0.001617362236471555, 
        5.83177298258951e-06, 
        -1.2700572055754653e-08, 
        1.5319803812807556e-11, 
        -7.856372760795868e-15
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      "B": [
        1, 
        -0.0019393289591385014
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      "Tmax": 419.19, 
      "Tmin": 87.80000000000001, 
      "_note": "coefficients are in increasing order; input in K, output in J/mol/K; value is entropy minus hs_anchor entropy", 
      "max_abs_error": 4.413514689697296, 
      "max_abs_error_units": "J/mol/K", 
      "type": "rational_polynomial"
    }, 
    "surface_tension": {
      "BibTeX": "Mulero-JPCRD-2012", 
      "Tc": 419.29, 
      "a": [
        0.05644
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      "description": "sigma = sum(a_i*(1-T/Tc)^n_i)", 
      "n": [
        1.248
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    }
  }, 
  "CAS": "106-98-9", 
  "ENVIRONMENTAL": {
    "ASHRAE34": "UNKNOWN", 
    "FH": 4, 
    "GWP100": -1.0, 
    "GWP20": -1.0, 
    "GWP500": -1.0, 
    "HH": 0, 
    "Name": "1-Butene", 
    "ODP": -1.0, 
    "PH": 0
  }, 
  "EOS": [
    {
      "BibTeX_CP0": "", 
      "BibTeX_EOS": "Lemmon-FPE-2005", 
      "STATES": {
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          "T": 461.21900000000005, 
          "T_units": "K", 
          "hmolar": 32730.237390320828, 
          "hmolar_units": "J/mol", 
          "p": 6529425.833796248, 
          "p_units": "Pa", 
          "rhomolar": 3816.0, 
          "rhomolar_units": "mol/m^3", 
          "smolar": 86.7783449330989, 
          "smolar_units": "J/mol/K"
        }, 
        "reducing": {
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          "T_units": "K", 
          "hmolar": 26144.467372336214, 
          "hmolar_units": "J/mol", 
          "p": 4005100, 
          "p_units": "Pa", 
          "rhomolar": 4240, 
          "rhomolar_units": "mol/m^3", 
          "smolar": 73.22968580865414, 
          "smolar_units": "J/mol/K"
        }, 
        "sat_min_liquid": {
          "T": 87.80000000000001, 
          "T_units": "K", 
          "hmolar": -19752.60359063145, 
          "hmolar_units": "J/mol", 
          "p": 7.563664543837497e-07, 
          "p_units": "Pa", 
          "rhomolar": 14581.857989478613, 
          "rhomolar_units": "mol/m^3", 
          "smolar": -121.44914873517425, 
          "smolar_units": "J/mol/K"
        }, 
        "sat_min_vapor": {
          "T": 87.80000000000001, 
          "T_units": "K", 
          "hmolar": 11492.903058115526, 
          "hmolar_units": "J/mol", 
          "p": 5.94529945955314e-07, 
          "p_units": "Pa", 
          "rhomolar": 8.144127114069457e-10, 
          "rhomolar_units": "mol/m^3", 
          "smolar": 234.42222539634042, 
          "smolar_units": "J/mol/K"
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      }, 
      "T_max": 525, 
      "T_max_units": "K", 
      "Ttriple": 87.8, 
      "Ttriple_units": "K", 
      "accentric": 0.191860647355, 
      "accentric_units": "-", 
      "alpha0": [
        {
          "a1": -0.00101126, 
          "a2": 2.3869174, 
          "type": "IdealGasHelmholtzLead"
        }, 
        {
          "a": 2.9197, 
          "type": "IdealGasHelmholtzLogTau"
        }, 
        {
          "n": [
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            6.5395, 
            14.535, 
            5.8971
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          "t": [
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            2.268119917002552, 
            5.072861265472584, 
            13.71842877244866
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          "type": "IdealGasHelmholtzPlanckEinstein"
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      "alphar": [
        {
          "d": [
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            1, 
            1, 
            2, 
            3, 
            7, 
            2, 
            5, 
            1, 
            4, 
            3, 
            4
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          "l": [
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            0, 
            0, 
            0, 
            1, 
            1, 
            2, 
            2, 
            3, 
            3
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          "n": [
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            0.017951, 
            0.088889, 
            0.00024673, 
            0.22846, 
            -0.074009, 
            -0.22913, 
            -0.062334, 
            -0.025385, 
            0.01104
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          "t": [
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            1.3, 
            1.74, 
            2.1, 
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            15, 
            14
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          "type": "ResidualHelmholtzPower"
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      "gas_constant": 8.314472, 
      "gas_constant_units": "J/mol/K", 
      "molar_mass": 0.05610631999999999, 
      "molar_mass_units": "kg/mol", 
      "p_max": 50000000, 
      "p_max_units": "Pa", 
      "pseudo_pure": false
    }
  ], 
  "NAME": "1-Butene", 
  "REFPROP_NAME": "1BUTENE", 
  "STATES": {
    "critical": {
      "T": 419.29, 
      "T_units": "K", 
      "p": 4005100.0, 
      "p_units": "Pa", 
      "rhomolar": 4240.0, 
      "rhomolar_units": "mol/m^3"
    }, 
    "triple_liquid": {
      "T": 87.80000000000001, 
      "T_units": "K", 
      "hmolar": -19752.60359063145, 
      "hmolar_units": "J/mol", 
      "p": 7.563664543837497e-07, 
      "p_units": "Pa", 
      "rhomolar": 14581.857989478613, 
      "rhomolar_units": "mol/m^3", 
      "smolar": -121.44914873517425, 
      "smolar_units": "J/mol/K"
    }, 
    "triple_vapor": {
      "T": 87.80000000000001, 
      "T_units": "K", 
      "hmolar": 11492.903058115526, 
      "hmolar_units": "J/mol", 
      "p": 5.94529945955314e-07, 
      "p_units": "Pa", 
      "rhomolar": 8.144127114069457e-10, 
      "rhomolar_units": "mol/m^3", 
      "smolar": 234.42222539634042, 
      "smolar_units": "J/mol/K"
    }
  }
}