Description

11-Phosphonoundecanoic Acid is a high-purity, long-chain phosphonic acid derivative valued for its excellent chelating and surface-active properties. This compound is a critical intermediate and functional additive, offering superior scale inhibition and metal ion sequestration compared to shorter-chain analogs. It is essential for manufacturers and formulators in the water treatment, personal care, and specialty chemical synthesis industries seeking advanced performance materials.

Application

• Water Treatment Chemicals: A highly effective scale and corrosion inhibitor in industrial cooling water, boiler water, and reverse osmosis systems, particularly for calcium carbonate and sulfate scales.
• Personal Care & Cosmetics: Used as a chelating agent and stabilizer in formulations such as shampoos, creams, and lotions to enhance shelf life and product integrity.
• Metal Surface Treatment: Serves as a key component in cleaning, pickling, and passivation solutions for metals, providing superior surface conditioning and rust prevention.
• Pharmaceutical Intermediates: Acts as a valuable building block in the synthesis of novel active pharmaceutical ingredients (APIs) with phosphonate functionalities.
• Textile & Leather Processing: Functions as a dispersing and sequestering agent in dyeing and tanning processes to improve color fastness and product quality.
• Industrial Cleaners & Detergents: Enhances the cleaning efficiency of industrial and institutional (I&I) formulations by controlling water hardness and preventing soil redeposition.
• Paints & Coatings: Used as a dispersant and stabilizer in pigment slurries and coating formulations to prevent agglomeration and ensure consistent application properties.
• Research & Development: Employed in academic and industrial R&D for developing new materials, catalysts, and functional polymers.

Basic Information

Product Name	11-Phosphonoundecanoic Acid
CAS No.	4494-24-0
Molecular Formula	C₁₁H₂₃O₅P
Molecular Weight	266.27 g/mol
Synonyms	11-Phosphonoundecanoic Acid; Undecane-1,11-dioic acid, 1-phosphono-; 1-Phosphonoundecanedioic acid; ω-Phosphonoundecanoic acid; Phosphono-1-undecanedioic acid; 11-Phosphono-undecanoic acid; Phosphonoundecanedioic acid; 1,11-Undecanedicarboxylic acid, 1-phosphono-
EINECS	Contact for details

Quality Control

Our 11-Phosphonoundecanoic Acid is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for identity, purity, and performance. Certificates of Analysis (COA) documenting key parameters such as assay, impurity profile, and physical characteristics are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which may affect product quality.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 97.0%
Water Content (KF)	≤ 2.0%
Melting Point	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm

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