{
 "license": "CC BY 4.0 — Tremon Solutions, https://www.tremon.nl/gases/r227ea",
 "generated": "2026-09-17",
 "key": "r227ea",
 "name": "HFC-227ea (Heptafluoropropane)",
 "formula": "C₃HF₇",
 "formula_plain": "C3HF7",
 "iupac": "1,1,1,2,3,3,3-heptafluoropropane",
 "synonyms": [],
 "cas": "431-89-0",
 "ec_number": "207-079-2",
 "un_number": "3296",
 "un_shipping_name": "Heptafluoropropane",
 "transport_class": "2.2 (Non-flammable, non-toxic gases)",
 "pubchem_cid": 67940,
 "molar_mass_g_mol": 170.03,
 "mg_m3_per_ppm_20c": 7.07,
 "boiling_point_c": -17.3,
 "sublimation_point_c": null,
 "melting_point_c": -131.0,
 "critical_temp_c": 100.0,
 "critical_pressure_bar": 29.5,
 "vapour_pressure_bar": 3.993,
 "vapour_pressure_at_c": 20.0,
 "density_gas_kg_m3": 7.9184,
 "density_condition": "0 °C, 1013 mbar",
 "relative_density_air": 6.1244,
 "solubility_water": null,
 "appearance": "gas liquefied under pressure, colourless, odourless, ethereal odour",
 "odour": "odourless",
 "chemical_character": [
  "Non-combustible gas.",
  "Gas is heavier than air.",
  "Danger of suffocation at high concentrations due to oxygen displacement."
 ],
 "hazard_class": "asphyxiant; greenhouse gas (F-gas Annex I)",
 "ghs_classification": [
  "Gases under pressure, liquefied gas; H280"
 ],
 "ghs_signal_word": "Warning",
 "ghs_hazard_statements": [
  "H280: Contains gas under pressure; may explode if heated."
 ],
 "euh_statements": [],
 "nfpa704": {
  "health": 1,
  "flammability": 0,
  "instability": 0,
  "special": null
 },
 "lel_vol_pct": null,
 "uel_vol_pct": null,
 "autoignition_c": 532.0,
 "temperature_class": "T1",
 "explosion_group": null,
 "eu_ioelv": {
  "twa_8h_ppm": null,
  "twa_8h_mg_m3": null,
  "stel_15min_ppm": null,
  "stel_15min_mg_m3": null,
  "directive": null
 },
 "de_agw": {
  "twa_ppm": null,
  "twa_mg_m3": null,
  "source": "TRGS 900 via GESTIS"
 },
 "nl_grenswaarde": {
  "note": "Netherlands: wettelijke grenswaarden (Arboregeling, bijlage XIII) — check the SER grenswaarden database (https://www.ser.nl/nl/thema/arbeidsomstandigheden/grenswaarden) for the current legal value; EU IOELVs are transposed into it."
 },
 "niosh_rel": {
  "twa_ppm": null,
  "stel_or_ceiling_ppm": null,
  "raw": null
 },
 "osha_pel": null,
 "idlh_ppm": null,
 "idlh_raw": null,
 "gwp100": {
  "ar4": 3220,
  "ar6": 3600,
  "eu_fgas_2024_573_annex": 3220
 },
 "atmospheric_lifetime_years": 36,
 "odp": 0,
 "gwp_note": null,
 "seveso_named": false,
 "health_effects": "Low toxicity (used as a fire-suppression agent at 7–9 vol%); cardiac sensitisation NOAEL ~9 %. Decomposes to HF in fire. Heavier than air (6×).",
 "main_toxic_effects_gestis": null,
 "routes_of_exposure": null,
 "ir_absorption_band_um": "8.0–9.0 µm (C–F stretch, ≈1150–1250 cm⁻¹)",
 "monitoring": [
  "NDIR (8–9 µm) for fire-suppression agent room monitoring (concentration proof after discharge, leak detection of cylinders).",
  "Design concentration 7–9 vol%; NOAEL 9 % (cardiac sensitisation)."
 ],
 "regulation_windows": [
  "F-gas 2024/573 Annex I (GWP 3220) — fire-protection equipment leak checks",
  "ISO 14520 / EN 15004 clean-agent systems"
 ],
 "tremon_products": [
  "IR·SF₆/refrigerant transmitter (R-227ea range)",
  "IR·OEM channel"
 ],
 "sources": [
  "https://gestis-database.dguv.de/data?name=490964",
  "https://pubchem.ncbi.nlm.nih.gov/compound/67940",
  "IPCC AR6 WG1 Ch.7 Supplementary Material, Table 7.SM.7 (https://www.ipcc.ch/report/ar6/wg1/downloads/report/IPCC_AR6_WGI_Chapter07_SM.pdf)",
  "IPCC AR4 WG1 Ch.2, Table 2.14 (https://www.ipcc.ch/site/assets/uploads/2018/02/ar4-wg1-chapter2-1.pdf)",
  "Regulation (EU) 2024/573, Annex I/III (https://eur-lex.europa.eu/eli/reg/2024/573/oj)",
  "HITRAN/NIST IR band positions (approximate centre of the strongest band used for NDIR; https://hitran.org, https://webbook.nist.gov)"
 ]
}