Agent Name

Nonanoic acid

Alternative Name

Pelargonic acid

CAS Number




Major Category

Other Classes


Pelargonic acid; 1-Octanecarboxylic acid; Cirrasol 185A; Cirrasol 185a; Emfac 1202; Hexacid C-9; Nonoic acid; Nonylic acid; Pelargic acid; Pelargon [Russian]; n-Nonanoic acid; n-Nonoic acid; n-Nonylic acid; [ChemIDplus]


Organic Acids


Colorless or yellowish liquid; mp = 12.5 deg C; [Hawley]


Naturally occurs as an ester in oil of pelargonium; [Merck Index] Found in several essential oils; Used in lacquers, pharmaceuticals, plastics, and in esters for turbojet lubricants; Also used as a flavor and fragrance, flotation agent, gasoline additive, herbicide, blossom thinner for apple and pear trees, sanitizer, and to peel fruits and vegetables; [HSDB] Used to make peroxides and greases, as a catalyst for alkyd resins, in insect attractants, and as a topical bactericide and fungicide medication; [CHEMINFO]


Category of C7-C9 aliphatic aldehydes and carboxylic acids: Members and supporting chemicals demonstrate low acute toxicity by oral, dermal, and inhalation exposures; toxicity in repeated-dose studies only at relatively high levels; no evidence of reproductive toxicity, developmental toxicity, or mutagenicity; [EPA ChAMP: Hazard Characterization] Highly irritating; [Merck Index] A strong skin irritant; [Hawley] A skin and eye irritant; [HSDB] May cause permanent eye damage, including blindness; [CHEMINFO] Safe when used as a flavoring agent in food; [JECFA] A corrosive substance that can cause injury to the skin, eyes, and respiratory tract; [MSDSonline]

Exposure Assessment
Vapor Pressure

0.00165 mm Hg

Explanatory Notes

Odor threshold = 3-9 ppm (detection); [HSDB] Odor threshold = "3.1 ppb (0.02 mg/m3) (detection); 0.25-0.5 ppb (0.0016-0.0032 mg/m3) (recognition); 0.7 ppb (0.0045 mg/m3) (100% recognition)" [CHEMINFO]

Adverse Effects

Skin Burns

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information


Chemical Information

Search ChemIDplus

Biomedical References

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Related Information in HazMap

Industrial Processes with risk of exposure: