{
  "ALIASES": [], 
  "ANCILLARIES": {
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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": 139.5305775237848, 
      "max_abs_error_units": "J/mol", 
      "type": "rational_polynomial"
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      "max_abs_error_units": "J/mol/K", 
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      "max_abs_error": 0.796042600149315, 
      "max_abs_error_units": "J/mol/K", 
      "type": "rational_polynomial"
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      "description": "sigma = sum(a_i*(1-T/Tc)^n_i)", 
      "n": [
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  "CAS": "306-83-2", 
  "ENVIRONMENTAL": {
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    "FH": 1, 
    "GWP100": 77.0, 
    "GWP20": 273.0, 
    "GWP500": 24.0, 
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      "gas_constant_units": "J/mol/K", 
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      "molar_mass_units": "kg/mol", 
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    {
      "BibTeX_CP0": "Younglove-JPCRD-1994", 
      "BibTeX_EOS": "Span-IJT-2003C", 
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        "sat_min_liquid": {
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        "sat_min_vapor": {
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      "T_max": 523, 
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      "Ttriple": 166, 
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      "accentric": 0.2819224970363519, 
      "accentric_units": "-", 
      "alpha0": [
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        {
          "a": -1, 
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        {
          "T0": 298, 
          "Tc": 456.82, 
          "cp_over_R": 2.046009, 
          "type": "IdealGasHelmholtzCP0Constant"
        }, 
        {
          "T0": 298, 
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          "c": [
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          "t": [
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          "type": "IdealGasHelmholtzCP0PolyT"
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        {
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          "reference": "IIR", 
          "type": "IdealGasHelmholtzEnthalpyEntropyOffset"
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          "n": [
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          "type": "ResidualHelmholtzPower"
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      "gas_constant": 8.31451, 
      "gas_constant_units": "J/mol/K", 
      "molar_mass": 0.152931, 
      "molar_mass_units": "kg/mol", 
      "p_max": 76000000, 
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      "pseudo_pure": false
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  ], 
  "NAME": "R123", 
  "REFPROP_NAME": "R123", 
  "STATES": {
    "critical": {
      "T": 456.831, 
      "T_units": "K", 
      "p": 3672000.0, 
      "p_units": "Pa", 
      "rhomolar": 3596.417, 
      "rhomolar_units": "mol/m^3"
    }, 
    "triple_liquid": {
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      "p": 0.004153442716713842, 
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      "rhomolar": 11612.830801100323, 
      "rhomolar_units": "mol/m^3"
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    "triple_vapor": {
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      "rhomolar": 0.0030093692214729455, 
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  }, 
  "TRANSPORT": {
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      "BibTeX": "Laesecke-IJR-1996", 
      "critical": {
        "hardcoded": "R123"
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      "dilute": {
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        "B": [
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        "T_reducing": 1, 
        "T_reducing_units": "K", 
        "m": [
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        "n": [
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        "type": "ratio_of_polynomials"
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      "residual": {
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        "T_reducing": 456.831, 
        "T_reducing_units": "K", 
        "d": [
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          4, 
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        "rhomass_reducing": 550.0, 
        "rhomass_reducing_units": "kg/m^3", 
        "t": [
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        "type": "polynomial"
      }
    }, 
    "viscosity": {
      "BibTeX": "Tanaka-IJT-1996", 
      "dilute": {
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        "t": [
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        "type": "powers_of_T"
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      "epsilon_over_k": 340, 
      "epsilon_over_k_units": "K", 
      "higher_order": {
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        "T_reduce_units": "K", 
        "a": [
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        "d1": [
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        "d2": [
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        "f": [
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        "g": [
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        "gamma": [
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        "h": [
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        "l": [
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        "p": [
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        "q": [
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        "rhomolar_reduce": 3596.417, 
        "rhomolar_reduce_units": "mol/m^3", 
        "t1": [
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        "t2": [
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        "type": "modified_Batschinski_Hildebrand"
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      "sigma_eta": 5.6e-10, 
      "sigma_eta_units": "m"
    }
  }
}