Description

Perfluorononanoic acid (PFNA) is a synthetic fluorinated organic compound belonging to the class of perfluoroalkyl carboxylic acids (PFCAs). With the molecular formula C₉HF₁₇O₂, it is characterized by a fully fluorinated carbon chain terminated by a carboxylic acid group. This high-purity compound is widely utilized in industrial and research applications due to its unique surfactant properties, chemical stability, and resistance to thermal and chemical degradation. PFNA is commonly employed as a processing aid, surfactant, or intermediate in the synthesis of fluoropolymers and specialty materials. It is supplied as a white crystalline solid or in solution, with rigorous quality control to ensure consistency for demanding laboratory and industrial applications.

Due to its persistent nature, researchers studying environmental contaminants, toxicology, or material science often utilize PFNA as a reference standard or model compound. Proper handling protocols should be followed, as with all perfluorinated compounds.

Properties

• CAS Number: 375-95-1
• Complexity: 615
• IUPAC Name: 2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,9-heptadecafluorononanoic acid
• InChI: InChI=1S/C9HF17O2/c10-2(11,1(27)28)3(12,13)4(14,15)5(16,17)6(18,19)7(20,21)8(22,23)9(24,25)26/h(H,27,28)
• InChI Key: UZUFPBIDKMEQEQ-UHFFFAOYSA-N
• Exact Mass: 463.9705080
• Molecular Formula: C9HF17O2
• Molecular Weight: 464.08
• SMILES: C(=O)(C(C(C(C(C(C(C(C(F)(F)F)(F)F)(F)F)(F)F)(F)F)(F)F)(F)F)(F)F)O
• Topological: 37.3
• Monoisotopic Mass: 463.9705080
• Physical Description: Beige crystalline solid;
• Vapor Pressure: 0.08 [mmHg]
• Dissociation Constants: pKa = -0.21
• Synonyms: Perfluorononanoic acid, 375-95-1, heptadecafluorononanoic acid, Perfluoro-n-nonanoic acid, PFNA, Nonanoic acid, heptadecafluoro-, Perfluorononan-1-oic acid, 2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,9-Heptadecafluorononanoic acid, Perfluornonansaeure, Heptadecafluornonansaeure, Heptadekafluornonansaeure, DTXSID8031863, CHEBI:38397, 5830Z6S63M, DTXCID6011863, PFNA perfluorononanoic acid, 206-801-3, PERFLUORONONANOICACID, Heptadecafluoropelargonic Acid, PFC; PFNA, Perfluorononanoic acid 100 microg/mL in Acetonitrile, NSC676910, EINECS 206-801-3, UNII-5830Z6S63M, HSDB 8040, perflurononanoic acid, MFCD00039605, Perfluoropelargonic Acid, C8F17COOH, SCHEMBL23557, n-Heptadecafluorononanoic acid, Perfluorononanoic acid, 97%, Perfluorononanoic acid (PFNA), CHEMBL426404, MSK9504, Tox21_300380, AKOS001044966, Nonanoic acid, 2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,9-heptadecafluoro-, FH60471, NCGC00163900-01, NCGC00163900-02, NCGC00163900-03, NCGC00254315-01, CAS-375-95-1, NCI60_027328, Perfluorononanoic acid, analytical standard, DB-049145, CS-0266342, H0843, Heptadecafluorononanoic acid (PFNA) Grade A, Heptadecafluorononanoic acid (PFNA) Grade B, NS00000368, Perfluorononanoic acid, 50 ug/ml in methanol, D90958, A823786, Q7168161, Z56871598, Heptadecafluorononanoic acid, Heptadecafluoropelargonic acid, PFNA, 2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,9-Heptadecafluoro-Nonanoic Acid, 2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,9-heptadecakis(fluoranyl)nonanoic acid, Heptadecafluoropelargonic acid;Perfluorononanoic acid;Perfluoropelargonic acid, 2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,9-Heptadecafluorononanoic acid compound with N,N,N-triethylamine (1:1), 4I6

Perfluorononanoic acid is primarily used as a surfactant and processing aid in the production of fluoropolymers such as PTFE. In academic and industrial research, PFNA serves as a critical reference standard for environmental monitoring of perfluoroalkyl substances (PFAS). Additionally, it finds application in material science for surface modification and as an intermediate in the synthesis of specialized fluorinated compounds. Its chemical stability makes it valuable for studies on the environmental persistence and toxicology of PFAS chemicals.

Safety and Hazards

GHS Hazard Statements

• H372: Causes damage to organs through prolonged or repeated exposure [Danger Specific target organ toxicity, repeated exposure]

Precautionary Statements

• P260, P264, P270, P319, and P501

Hazard Classes and Categories

• Carcinogenicity – category 2
• Reproductive toxicity – category 1B
• Reproductive toxicity – effects on or via lactation
• Acute toxicity – category 4
• Acute toxicity – category 4
• Specific target organ toxicity – category 1
• Eye damage – category 1

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