Sodium hypophosphite monohydrate

CAS Number
10039-56-2
EC Number
600-090-7

What is Sodium hypophosphite monohydrate?

Sodium hypophosphite monohydrate (CAS 10039-56-2) is the stable, water-soluble hydrated salt form of sodium hypophosphite, used as a reducing agent and catalyst component.

Where is Sodium hypophosphite monohydrate used?

  • Electroless metal plating: chemical reducing agent
  • Electronics: primary reducing agent in electroless nickel plating baths
  • Textile processing: catalyst activator in flame-retardant finishing treatments, particularly durable press and phosphorus-based systems
  • Pharmaceutical manufacturing: antioxidant stabilizer and reducing agent in formulations with oxygen-sensitive active ingredients
  • Water treatment: sequestering agent that controls metal ion activity and inhibits scale formation
  • It deposits uniform nickel coatings onto substrates regardless of geometry.

Commercial specifications

  • Purity typically 98% or higher
  • Bulk supply in bags or drums

Other Names (Synonyms)

4VN69WUP7N|RefChem:183942|Fosfornan sodny|Phosphinic acid, sodium salt, monohydrate|Sodium hypophosphite hydrate|Sodium phosphenite hydrate|Phosphinic acid, sodium salt, hydrate (1:1:1)

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What are the physical properties of Sodium hypophosphite monohydrate?

Melting Point 90°C
Density 0.8
Appearance White crystals
Color Colorless crystalline
Odor Odorless
Form Solid
Water Solubility 1000 g/L (20 ºC)
pH 6-8 (20℃, 5%)

Which trade and regulatory codes apply to Sodium hypophosphite monohydrate?

HS Code 28351000
Storage Class 11 - Combustible Solids
WGK (Germany) 3
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