Agent Name

Fuel oil, residual

CAS Number




Major Category

Other Classes


IFO-180; Residual fuel oil; Residual(heavy) fuel oil; [ChemIDplus] BNL 538 / Intermediate bunker fuel 3.5% S; Brisol FS7; Braendselsolie rest; Fuelolie; Fuel 77; Fuel 45; Bunker C; Bunker fuel oil; Fioul lourd no 1; FO1; FOL1; Fioul soutes; IF 380; IF 180; IF 120; Fiouls lourds importes; FOL; FO; Fluxed VPS bottoms; Fuel Oil; FUEL OIL; Heavy fuel oil; HFO; Fueloil marino; MFO; RFO; Fueloleo residual; Fueloil; FUELOIL 1% SULPHUR; FUELOIL 3% SULPHUR; FUELOIL 3.5% SULPHUR; FUELOIL BIA; FUELOIL BLENDING; FUELOIL No 1; FUELOIL No 2; Fuels Lourd/Intermediate; Fuels ververie/fuel de chauffe; Furnace Oil; Heavy Fuel Oil; HEAVY FUEL OIL; Heavy fuel oil 3% S (land); Heavy/Medium fuel oils; Heizoel Schwer; Heizol; High Sulphur Fuel Oil; HIGH VISCOSITY FUELOIL; HS; HVS; IF 80/180/380/460; INTERFUELOIL; Intermediate fuel oil; LIGHT FUEL OIL; Light fuel oil; Low S fuel oil; MARINE BUNKERS; MARINE FUEL OIL; MEDIUM FUEL OIL; Petroleum hydrocarbons; REFINERY FUELOIL; Resid; Residual Fuel Oil; Residue; RESIDUAL FUEL OIL; Schweres Heizol; HS; Neustadt/Donau; Semilavorato pesante; Heizozol fur Bunkerzwecke (HSBU); Heizol schwer 2,8 (HS2,8); Vac. Resid rundowns; [IUCLID] Bunker Fuel; Bunker C Grade 6; [Total Petrochemicals MSDS] UN1268


Petroleum Refining Residues


Dark brown liquid with an odor like asphalt; [Total Petrochemicals MSDS]


Permitted for use as an inert ingredient in non-food pesticide products; [EPA] Used as a fuel, to power ships, to make carbon, as a conductive agent, for heating, and a chemical intermediate; [IUCLID]


"TSCA Definition 2008: The liquid product from various refinery streams, usually residues. The composition is complex and varies with the source of the crude oil." [ChemIDplus] Similar fuel oil demonstrates skin and eye irritation in rabbits and skin sensitization in guinea pigs; 28-day dermal study of rats produced a LOAEL of 480 mg/kg/day for increased liver and spleen weights and decreased erythrocytes, hemoglobin, and hematocrit values; [EPA ChAMP: Hazard Characterization: Heavy Fuel Oils] May release hydrogen sulfide gas; May cause irritation; [Total Petrochemicals MSDS]

Exposure Assessment
Lethal Concentration

LC50 (rat) = 4,100 mg/m3/4hr

Explanatory Notes

The Guide in the Emergency Response Guidebook is for "Petroleum distillates, n.o.s."

Adverse Effects
IARC Carcinogen

Possible Carcinogen

Links to Other NLM Databases
Toxicity Information


Chemical Information

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Related Information in HazMap
Other Information

No other related information on this agent was found.