Products Description
Sodium Hypophosphite Monohydrate (SHP), CAS#10039-56-2, formula NaH₂PO₂·H₂O, is white or colorless monoclinic crystalline powder/pearly crystal, odorless, easily deliquescent when exposed to humid air. It is a powerful, mild and stable inorganic reducing agent. Highly soluble in water, ethanol and glycerol; its 10% aqueous solution shows weak alkalinity, with pH value around 6-8. HS:2835100010. Not dangerous goods for normal shipment by sea, road or air. It is the most widely used, cost-effective reducing agent for the modern electroless nickel plating industry.
Chemical Properties
| Melting point | 90°C |
| density | 0.8 |
| solubility | 1000 g/L (20°C) |
| form | Solid |
| color | Colorless crystalline |
| PH | 6-8 (20℃, 5%) |
| Odor | Odorless |
| PH Range | 6 - 8 at 50 g/l at 25 °C |
| Water Solubility | 1000 g/L (20 ºC) |
| Sensitive | Hygroscopic |
| Merck | 14,8629 |
| InChI | InChI=1S/Na.HO2P.H2O.H/c;1-3-2;;/h;(H,1,2);1H2; |
| InChIKey | ACUGTEHQOFWBES-UHFFFAOYSA-M |
| SMILES | P(O)=O.[NaH].O |
| CAS DataBase Reference | 10039-56-2(CAS DataBase Reference) |
Safety informations
| Safety Statements | 22-24/25 |
| WGK Germany | 3 |
| RTECS | SZ5640000 |
| F | 3 |
| TSCA | Yes |
| HS Code | 28351000 |
Product Application
Sodium Hypophosphite Monohydrate (SHP) serves as a versatile industrial and specialty chemical, covering a full spectrum of application scenarios across multiple sectors. It acts as the core reducing agent for electroless nickel plating (ENP), functioning as the essential raw material to form uniform nickel-phosphorus coatings on substrates ranging from metals to plastics and ceramics. It also works as a reliable reductant in organic synthesis processes, supporting targeted reduction reactions and high-purity catalyst preparation. Beyond that, it is a functional additive widely adopted in non-halogen flame retardant formulations, heavy metal removal water treatment systems, and fast-curing concrete admixtures. With GRAS approval, it can be safely used as a mild food antioxidant and stabilizer, and it also serves as a standard chemical reagent for reduction-related laboratory experiments.
