Фосфинат калия

Description

Potassium phosphinate is a potassium salt of phosphinic (phosphorous) acid, KH2PO2. The traditional name is potassium hypophosphite. Additional registration number 448193-22-4. In the H2PO2⁻ anion, phosphorus is in the +1 oxidation state and is directly bonded to two hydrogen atoms; It is these P-H bonds that are responsible for the strong reducing properties of the salt. The product is highly soluble in water and hygroscopic.

Basic Attributes

• CAS No.: 7782-87-8 (optional 448193-22-4)
• Chemical formula: H3O2P K (KH2PO2)
• Molecular weight: 104.09
• Exact weight: 103.942947
• EU number: 231-967-9
• PSA Specifications: 56.88

Purpose

Reducing agent. The hypophosphite ion gives up electrons, oxidizing to phosphite, and is capable of reducing nickel, copper and noble metal ions to the metallic state without external current. The technology of chemical (electrolysis-free) coating deposition is based on this: the layer is laid evenly over the entire surface of the product, including internal cavities and blind holes where galvanic current does not penetrate.

Applications

• chemical nickel plating: reducing agent in nickel-phosphorus coating deposition baths
• electrolysis-free copper plating and deposition of precious metal coatings
• metallization of dielectrics - plastics, ceramics, printed circuit boards
• polymer processing: stabilizer that suppresses oxidative destruction and yellowing of the melt
• synthesis of organophosphorus compounds, including phosphinate-based flame retardants
• reduction operations in inorganic synthesis and analytics

Features of nickel-phosphorus coating

• uniform thickness regardless of part geometry
• increased hardness and wear resistance, further increasing after heat treatment
• corrosion resistance, depending on the phosphorus content in the layer
• Possibility of application to non-conductive substrates after surface activation

Safety

GHS classification, hazard instructions and hazard class codes are not provided in the product card. Hypophosphites are reducing agents: mixtures with oxidizing agents, chlorates, nitrates and perchlorates can react violently, even to the point of ignition. When heated above the decomposition temperature, phosphine, an extremely toxic gas, can be formed. Work is carried out with gloves and safety glasses, heating is done under a hood.

Storage

A cool, dry room, a tightly closed container—salt is hygroscopic and melts in air. Separate storage with oxidizing agents is mandatory. Spills are collected dry, avoiding mixing with foreign substances.