Description

Perfluoroundecanoic Acid is a high-purity, long-chain perfluorinated carboxylic acid (PFCA) with the CAS registry number 4234-23-5. This compound serves as a critical building block and performance additive, valued for its exceptional chemical and thermal stability imparted by the strong carbon-fluorine bonds. It is essential for manufacturers and researchers in advanced material science, surface treatment, and specialty chemical synthesis who require reliable, high-quality fluorochemical intermediates to develop products with superior non-stick, oil-repellent, and low-surface-energy properties.

Application

• Fluoropolymer Manufacturing: Acts as a key monomer or processing aid in the synthesis of high-performance fluoroplastics and elastomers.
• Surface Treatment & Coatings: Used to create durable, water- and oil-repellent coatings for textiles, paper, and leather.
• Specialty Surfactants & Additives: Serves as a precursor for formulating fluorinated surfactants, leveling agents, and anti-foaming additives in demanding industrial applications.
• Electronic Materials: Employed in the development of advanced photoresists, anti-reflective coatings, and dielectric materials for the semiconductor industry.
• Fire-Fighting Foams (Legacy/Research): Historically a component in aqueous film-forming foams (AFFF); current supply focuses on research and controlled industrial use.
• Chemical Synthesis & Research: A valuable intermediate in organic synthesis and a reference standard in analytical and environmental research on per- and polyfluoroalkyl substances (PFAS).

Basic Information

Product Name	Perfluoroundecanoic Acid
CAS No.	4234-23-5
Molecular Formula	C11HF21O2
Molecular Weight	564.08 g/mol
Synonyms	Hendecafluoroundecanoic Acid; Undecafluoroundecanoic Acid; PFUnDA; Perfluoro-n-undecanoic Acid; 2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,11-Heneicosafluoro-undecanoic Acid; FC-21; Perfluoro C10 Acid; 11-Fluoroundecanoic Acid, 2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,11-heneicosafluoro-
EINECS	224-203-8

Quality Control

Our Perfluoroundecanoic Acid is produced under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC, NMR, and GC-MS, to ensure identity, purity, and consistency. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing all specified parameters. Our quality commitment ensures the material meets the high standards required for research and industrial applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong bases and oxidizing agents. For long-term storage, consider under an inert atmosphere to maintain optimal purity.

Specification

Item	Specification
Appearance	White to off-white crystalline solid
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 97.0%
Melting Point	Approx. 105 - 110 °C
Heavy Metals (as Pb)	≤ 10 ppm
Water Content (KF)	≤ 0.5%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.