{
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          "type": "IdealGasHelmholtzPower"
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  "INFO": {
    "2DPNG_URL": "http://www.chemspider.com/ImagesHandler.ashx?id=391",
    "ALIASES": [
      "H2S",
      "HYDROGENSULFIDE"
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    "CAS": "7783-06-4",
    "CHEMSPIDER_ID": 391,
    "ENVIRONMENTAL": {
      "ASHRAE34": "UNKNOWN",
      "FH": 4,
      "GWP100": -1.0,
      "GWP20": -1.0,
      "GWP500": -1.0,
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      "Name": "HydrogenSulfide",
      "ODP": -1.0,
      "PH": 0
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    "FORMULA": "H_{2}S_{1}",
    "INCHI_KEY": "RWSOTUBLDIXVET-UHFFFAOYSA-N",
    "INCHI_STRING": "InChI=1S/H2S/h1H2",
    "NAME": "HydrogenSulfide",
    "REFPROP_NAME": "H2S",
    "SMILES": "S"
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  "STATES": {
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    "triple_vapor": {
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  },
  "TRANSPORT": {
    "viscosity": {
      "BibTeX": "QuinonesCisneros-JCED-2012",
      "dilute": {
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        "type": "collision_integral_powers_of_Tstar"
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      "epsilon_over_k": 355.8,
      "epsilon_over_k_units": "K",
      "higher_order": {
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        "Aaa": [
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        "Ar": [
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          -1.13967e-07
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        "Arr": [
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        "Na": 1,
        "Naa": 1,
        "Nr": 1,
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        "T_reduce": 373.1,
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        "type": "friction_theory"
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      "initial_density": {
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        "t": [
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        "type": "Rainwater-Friend"
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      "sigma_eta": 3.565e-10,
      "sigma_eta_units": "m"
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}