{
 "license": "CC BY 4.0 — Tremon Solutions, https://www.tremon.nl/gases/c4f7n",
 "generated": "2026-09-17",
 "key": "c4f7n",
 "name": "Heptafluoroisobutyronitrile (C4F7N, Novec 4710)",
 "formula": "C₄F₇N",
 "formula_plain": "C4F7N",
 "iupac": "2,3,3,3-tetrafluoro-2-(trifluoromethyl)propanenitrile",
 "synonyms": [],
 "cas": "42532-60-5",
 "ec_number": "806-451-7",
 "un_number": "3163",
 "un_shipping_name": "Liquefied gas, n.o.s. (heptafluoroisobutyronitrile)",
 "transport_class": "2.2 (non-flammable, non-toxic gases)",
 "pubchem_cid": 12633773,
 "molar_mass_g_mol": 195.04,
 "mg_m3_per_ppm_20c": 8.11,
 "boiling_point_c": -4.7,
 "sublimation_point_c": null,
 "melting_point_c": -118.0,
 "critical_temp_c": 112.9,
 "critical_pressure_bar": 25.0,
 "vapour_pressure_bar": 2.97,
 "vapour_pressure_at_c": 25.0,
 "density_gas_kg_m3": 7.9,
 "density_condition": "1 bar, ideal gas (3M)",
 "relative_density_air": 6.73,
 "solubility_water": null,
 "appearance": "colourless, non-flammable liquefied gas",
 "odour": "not stated",
 "chemical_character": [],
 "hazard_class": "harmful if inhaled (Acute Tox. 4); greenhouse gas (F-gas Annex I)",
 "ghs_classification": [
  "Gases under pressure, liquefied gas; H280",
  "Acute toxicity, Category 4, inhalation; H332"
 ],
 "ghs_signal_word": "Warning",
 "ghs_hazard_statements": [
  "H280: Contains gas under pressure; may explode if heated.",
  "H332: Harmful if inhaled."
 ],
 "euh_statements": [],
 "nfpa704": {
  "health": 2,
  "flammability": 0,
  "instability": 0,
  "special": null
 },
 "lel_vol_pct": null,
 "uel_vol_pct": null,
 "autoignition_c": null,
 "temperature_class": null,
 "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": null,
  "ar6": null,
  "eu_fgas_2024_573_annex": 2750
 },
 "atmospheric_lifetime_years": 30,
 "odp": 0,
 "gwp_note": "AR6 lists a GWP100 of 2,750 for iso-C₃F₇CN (as used by Reg. 2024/573 Annex I, Section 3); 3M technical data cites 2,100 (AR5 method) / 2,240 (AR6 method).",
 "seveso_named": null,
 "health_effects": "Classified Acute Tox. 4 (harmful if inhaled) — unlike SF₆ it is not inert to the body; 3M’s 4-week inhalation NOAEL data underpin an 8-h workplace guideline of 65 ppm (3M). Used at 4–6 % in CO₂/O₂ mixtures in switchgear. Decomposition products in arcs are toxic (COF₂, CF₃CN, HF).",
 "main_toxic_effects_gestis": null,
 "routes_of_exposure": null,
 "ir_absorption_band_um": "7.5–8.5 µm (C–F stretch); 4.4 µm (C≡N stretch, ≈2260 cm⁻¹)",
 "monitoring": [
  "NDIR (7.5–8.5 µm) or photoacoustic for room monitoring around C4F7N/CO₂ switchgear; density/pressure monitors on compartments as for SF₆ (Reg. 2024/573 Annex I gas, same monitoring exemption logic).",
  "3M workplace guideline 65 ppm (8-h); mixture 4–6 % in CO₂/O₂."
 ],
 "regulation_windows": [
  "F-gas 2024/573 Annex I Section 3 (GWP 2750) — same leak-check / monitoring logic as SF₆ for switchgear",
  "IEC 62271-4 / CIGRE guidance on handling"
 ],
 "tremon_products": [
  "DM-91 (Novec 4710 mixtures)",
  "IR·OEM channel (per project)"
 ],
 "sources": [
  "https://pubchem.ncbi.nlm.nih.gov/compound/12633773",
  "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)",
  "Regulation (EU) 2024/573, Annex I/III (https://eur-lex.europa.eu/eli/reg/2024/573/oj)",
  "3M Novec 4710 Insulating Gas — Technical Data, July 2015 (https://multimedia.3m.com/mws/media/1132124O/technical-data-july-2015.pdf)",
  "HITRAN/NIST IR band positions (approximate centre of the strongest band used for NDIR; https://hitran.org, https://webbook.nist.gov)"
 ]
}