{
  "ALIASES": [
    "R744", 
    "co2", 
    "CO2", 
    "carbondioxide", 
    "CARBONDIOXIDE"
  ], 
  "ANCILLARIES": {
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      "Tmax": 304.02819999999997, 
      "Tmin": 216.592, 
      "_note": "coefficients are in increasing order; input in K, output in J/mol; value is enthalpy minus hs_anchor enthalpy", 
      "max_abs_error": 72.68905903839186, 
      "max_abs_error_units": "J/mol", 
      "type": "rational_polynomial"
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    "hLV": {
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        12.031665317644778, 
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      "Tmax": 304.02819999999997, 
      "Tmin": 216.592, 
      "_note": "coefficients are in increasing order; input in K, output in J/mol; value is enthalpy minus hs_anchor enthalpy", 
      "max_abs_error": 173.64292643581348, 
      "max_abs_error_units": "J/mol", 
      "type": "rational_polynomial"
    }, 
    "melting_line": {
      "BibTeX": "Span-JPCRD-1996", 
      "T_m": 216.58, 
      "parts": [
        {
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          "T_max": 330, 
          "T_min": 216.592, 
          "a": [
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            2055.4593
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            2
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      "type": "polynomial_in_Theta"
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    "pL": {
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      "Tmax": 304.1281999999994, 
      "Tmin": 216.592, 
      "description": "p' = pc*exp(Tc/T*sum(n_i*theta^t_i))", 
      "max_abserror_percentage": 0.0010595686337877552, 
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      "reducing_value": 7377300.0, 
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      "type": "pL", 
      "using_tau_r": true
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    "pV": {
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      "Tmin": 216.592, 
      "description": "p'' = pc*exp(Tc/T*sum(n_i*theta^t_i))", 
      "max_abserror_percentage": 0.0017511543346171443, 
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      "reducing_value": 7377300.0, 
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      "type": "pV", 
      "using_tau_r": true
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      "description": "rho' = rhoc*(1+sum(n_i*theta^t_i))", 
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        888.2387848519858
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      "type": "rhoLnoexp", 
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      "Tmax": 304.1281999999994, 
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      "description": "rho'' = rhoc*exp(Tc/T*sum(n_i*theta^t_i))", 
      "max_abserror_percentage": 0.035329219540658485, 
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      "type": "rhoV", 
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      "max_abs_error_units": "J/mol/K", 
      "type": "rational_polynomial"
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      "max_abs_error": 0.5638485464661311, 
      "max_abs_error_units": "J/mol/K", 
      "type": "rational_polynomial"
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    "surface_tension": {
      "BibTeX": "Mulero-JPCRD-2012", 
      "Tc": 304.128, 
      "a": [
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      "description": "sigma = sum(a_i*(1-T/Tc)^n_i)", 
      "n": [
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  "CAS": "124-38-9", 
  "ENVIRONMENTAL": {
    "ASHRAE34": "A1", 
    "FH": 0, 
    "GWP100": 1.0, 
    "GWP20": 1.0, 
    "GWP500": 1.0, 
    "HH": 1, 
    "Name": "CarbonDioxide", 
    "ODP": -1.0, 
    "PH": 0
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  "EOS": [
    {
      "BibTeX_CP0": "", 
      "BibTeX_EOS": "Span-JPCRD-1996", 
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        "reducing": {
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          "hmolar_units": "J/mol", 
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          "rhomolar_units": "mol/m^3", 
          "smolar": 63.10475559231642, 
          "smolar_units": "J/mol/K"
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        "sat_min_liquid": {
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          "hmolar": 3522.347496266107, 
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        "sat_min_vapor": {
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          "hmolar": 18942.529431708266, 
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      "T_max": 1100, 
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      "Ttriple": 216.592, 
      "Ttriple_units": "K", 
      "accentric": 0.22394, 
      "accentric_units": "-", 
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          "type": "ResidualHelmholtzGaussian"
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          "B": [
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          "b": [
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          "type": "ResidualHelmholtzNonAnalytic"
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      "gas_constant": 8.31451, 
      "gas_constant_units": "J/mol/K", 
      "molar_mass": 0.0440098, 
      "molar_mass_units": "kg/mol", 
      "p_max": 800000000, 
      "p_max_units": "Pa", 
      "pseudo_pure": false
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  ], 
  "NAME": "CarbonDioxide", 
  "REFPROP_NAME": "CO2", 
  "STATES": {
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      "T": 304.1282, 
      "T_units": "K", 
      "p": 7377300.0, 
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      "rhomolar_units": "mol/m^3"
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    "triple_liquid": {
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      "T_units": "K", 
      "hmolar": 3522.347496266107, 
      "hmolar_units": "J/mol", 
      "p": 517964.34344772575, 
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      "rhomolar": 26777.277860217495, 
      "rhomolar_units": "mol/m^3", 
      "smolar": 22.943179480180966, 
      "smolar_units": "J/mol/K"
    }, 
    "triple_vapor": {
      "T": 216.592, 
      "T_units": "K", 
      "hmolar": 18942.529431708266, 
      "hmolar_units": "J/mol", 
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      "rhomolar": 312.6777588871105, 
      "rhomolar_units": "mol/m^3", 
      "smolar": 94.13778439068052, 
      "smolar_units": "J/mol/K"
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  }, 
  "TRANSPORT": {
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      "BibTeX": "Scalabrin-JPCRD-2006-CO2", 
      "critical": {
        "hardcoded": "CarbonDioxideScalabrinJPCRD2006"
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      "dilute": {
        "hardcoded": "none"
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      "residual": {
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        "d": [
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        "rhomass_reducing": 467.6, 
        "rhomass_reducing_units": "kg/m^3", 
        "t": [
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        "type": "polynomial_and_exponential"
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    }, 
    "viscosity": {
      "BibTeX": "Fenghour-JPCRD-1998", 
      "_note": "sigma set to 1 nm in since sigma wrapped into constant in equation in Fenghour", 
      "dilute": {
        "C": 1.5178953643112785e-07, 
        "_note": "Leading coefficient was back calculated from 1.00697e-6/(44.0098)**0.5 (using sigma = 1 nm)", 
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        "molar_mass": 0.0440098, 
        "molar_mass_units": "kg/mol", 
        "t": [
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        "type": "collision_integral"
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      "epsilon_over_k": 251.196, 
      "epsilon_over_k_units": "K", 
      "higher_order": {
        "T_reduce": 304.1282, 
        "T_reduce_units": "K", 
        "_note": "All of the coefficients for higher order viscosity contribution were converted to be in terms of delta and tau", 
        "a": [
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        "d1": [
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        "t2": [
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        "type": "modified_Batschinski_Hildebrand"
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      "sigma_eta": 1e-09, 
      "sigma_eta_units": "m"
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  }
}