Hypophosphorous acid Cas 6303-21-5

CAS Number

6303-21-5

Molecular Formula

HO2P

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Product Description

Product introduction

Hypophosphorous acid (IUPAC: phosphinic acid; empirical formula H₃PO₂; CAS 6303-21-5) is supplied commercially primarily as aqueous solutions (various concentrations) or technical liquids. It serves as a selective inorganic reducing agent and as the acid parent for hypophosphite salts used in electroless metal deposition. Commercial grades are delivered with lot-specific Certificates of Analysis (CoA) and Safety Data Sheets (SDS); select the concentration and grade appropriate to the downstream process.

Applications & Descriptions

  • Electroless Plating
    Used (or converted to hypophosphite salts) as the reducing agent in electroless nickel-phosphorus deposition baths and related autocatalytic metal-deposition processes.

  • Chemical Reducing Agent
    Employed as a selective inorganic reductant in specialty syntheses and laboratory-scale reduction steps where controlled reduction is required.

  • Stabiliser & Polymer Chemistry
    Applied in some formulations as a reducing or stabilising additive in polymer and specialty-chemical processes (evaluate compatibility per formulation).

  • Intermediate For Hypophosphite Salts
    Processed to produce hypophosphite salts (e.g., sodium hypophosphite) that are widely used in plating baths and industrial chemistry.

  • Analytical / Reagent Use
    Supplied as a reagent for analytical methods, small-scale research and method development requiring phosphorus(III) reductants.

  • Corrosion-Related Additive Chemistry
    Used as a building block in the synthesis of certain corrosion inhibitor chemistries and specialty additives (assess material and regulatory suitability).

Technical Parameters

Parameter Value
Melting point -25 °C
Boiling point 108 °C (759.8513 mmHg)
Density 1.206 g/mL at 20 °C(lit.)
Vapor pressure <17 mmHg ( 20 °C)
Storage temp no restrictions
Solubility very soluble in H2O, ethanol, ethyl ether
Form hygroscopic crystals or colorless oily liquid
Color Colorless

Applications

Electrolyte Solvents

Quick Information

EINECS 228-601-5
Molecular Weight 63.98 g/mol

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