Description

Phenylphosphinic Acid CAS NO 121-70-0 is an important organophosphorus compound characterized by a phosphorus atom bonded to a phenyl group and two hydroxyl groups. This versatile chemical intermediate is valued for its ability to act as a ligand, catalyst, and building block in the synthesis of more complex phosphorus-containing molecules. It is primarily sought after by manufacturers in the pharmaceutical, agrochemical, and specialty polymer industries for the development of flame retardants, catalysts, and active pharmaceutical ingredients.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of novel active pharmaceutical ingredients (APIs) and drug candidates.
• Flame Retardant Precursor: Used in the production of organophosphorus flame retardants for engineering plastics and textiles.
• Catalyst & Ligand Synthesis: Serves as a precursor for chiral and achiral phosphine ligands used in homogeneous catalysis (e.g., cross-coupling reactions).
• Agrochemical Manufacturing: Intermediate in the synthesis of herbicides, fungicides, and plant growth regulators.
• Polymer Modification: Employed to introduce phosphorus groups into polymers, enhancing properties like flame resistance and adhesion.
• Metal Chelation & Extraction: Acts as a chelating agent for certain metal ions in analytical and separation processes.
• Research & Development: Utilized in academic and industrial R&D for exploring new organophosphorus chemistry and materials science.

Basic Information

Product Name	Phenylphosphinic Acid
CAS No.	121-70-0
Molecular Formula	C6H7O2P
Molecular Weight	142.09 g/mol
Synonyms	Benzenephosphinic Acid; Phenylphosphonic Acid (common misnomer); PPA; Monophenylphosphinic Acid; Phosphinic acid, P-phenyl-; (Hydroxy)(phenyl)phosphine oxide; Phenylphosphinous acid; Phenyl-H-phosphinic acid
EINECS	204-494-5

Quality Control

Our Phenylphosphinic Acid is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure it meets high-purity standards suitable for demanding synthetic applications. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as assay, identity, and impurity profiles. Our quality commitment ensures batch-to-batch consistency and reliability for your critical processes.

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). Keep away from strong bases, oxidizing agents, and moisture. For long-term storage, consider using an inert atmosphere to maintain product integrity.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	158 - 162 °C
Loss on Drying	≤ 0.5%
Heavy Metals (as Pb)	≤ 10 ppm

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