Sodium persulfate
Advanced Oxidative Degradation Capacity: Generates highly reactive sulfate radicals (SO₄•⁻) through thermal activation, achieving effective mineralization of organic contaminants – exemplified by 42.22% polyacrylamide removal efficiency in wastewater treatment systems. Particularly suitable for soil and groundwater remediation applications.
Engineered Controlled-Release Performance: Processable into sustained-release formulations (e.g., paraffin-based composites) demonstrating 74–92% active component release over 31-day periods, substantially reducing application frequency in prolonged environmental remediation projects.
Ecological Efficiency and Handling Advantages: Exhibits notable hydrosolubility (550 g/L) for rapid field formulation, while qualifying for Packing Group III regulations that enable cost-effective bulk container shipping despite oxidizer classification, balancing operational safety with logistical economy.
Sodium persulfate (systematically named sodium peroxodisulfate) presents as white crystalline particulates or powdered solids. This odorless and tasteless compound possesses the chemical formula Na₂S₂O₈. The substance undergoes gradual decomposition under ambient conditions while exhibiting accelerated degradation kinetics when subjected to thermal stress or ethanol exposure.
Melting point | 100 °C |
density | 2,4 g/cm3 |
bulk density | 1150kg/m3 |
vapor pressure | 0Pa at 25℃ |
refractive index | 1.43 |
storage temp. | Store at +15°C to +25°C. |
solubility | H2O: 1 M at 20 °C, clear, colorless |
form | Solid |
Specific Gravity | 2.4 |
color | White to yellow |
PH | 3.5-3.8 (100g/l, H2O, 20℃) |
Odor | Odorless |
PH Range | 2.5 - 4.0 |
Water Solubility | 550 g/L (20 ºC) |
Merck | 14,8656 |
Exposure limits | ACGIH: TWA 0.1 mg/m3 |
Stability: | Stability Unstable. Strong oxidizer. Contact with combustible material may cause fire. Incompatible with combustible material, strong reducing agents, strong bases, alcohols, aluminium, magnesium. Protect from moisture. |
InChIKey | CHQMHPLRPQMAMX-UHFFFAOYSA-L |
LogP | -1 at 20℃ |
CAS DataBase Reference | 7775-27-1(CAS DataBase Reference) |
EPA Substance Registry System | Sodium persulfate (7775-27-1) |
Absorption | cut-off at 309nm in H2O at 1M |
Safety Information
Hazard Codes | O,Xn |
Risk Statements | 8-22-42/43-36/37/38 |
Safety Statements | 22-36/37-45-36/37/39-26-17 |
RIDADR | UN 1505 5.1/PG 3 |
WGK Germany | 1 |
RTECS | SE0525000 |
TSCA | Yes |
HS Code | 2833 40 00 |
HazardClass | 5.1 |
PackingGroup | III |
Toxicity | MLD in rabbits (mg/kg): 178 i.v. (DaVal) |
The decomposition reaction releases oxygen gas and yields sodium pyrosulfate (Na₂S₂O₇). This degradation process experiences catalytic acceleration in the presence of aqueous media or metallic ions such as platinum black, silver, lead, iron, copper, magnesium, nickel, manganese, and their alloy combinations. Under high-temperature conditions (approaching 200°C), rapid thermal decomposition occurs with concurrent generation of hydrogen peroxide.
