Hydrazine Oxygen Scavenger for High-Pressure Boilers
CAS Number: 302-01-2
Hydrazine (N2H4) is a volatile oxygen scavenger and metal passivator used in high-pressure steam boilers and power plant steam-water circuits. It reacts stoichiometrically with dissolved oxygen to produce nitrogen and water with no solid residuals, and simultaneously passivates iron and copper oxide surfaces to form a dense protective magnetite layer. Supplied as 35% or 64% aqueous solution.
Technical Specifications
| purity | ≥99.0% (anhydrous basis) |
| appearance | Clear colorless fuming liquid |
| density 35pct | 1.01–1.03 g/cm³ |
| water content | Balance |
| hydrazine content | 35% or 64% aqueous solution |
| pH 10pct solution | 9.5–10.5 |
Applications
- High-pressure utility and industrial steam boiler oxygen scavenging
- Combined cycle power plant steam circuit treatment
- Nuclear power plant secondary steam circuit protection
- Steam turbine condensate dissolved oxygen control
- Passivation of pre-boiler and boiler components during start-up
Key Features
- Zero dissolved solids — decomposes entirely to N2 and H2O
- Effective at very low oxygen concentrations (<10 ppb) in high-purity boiler systems
- Dual passivation of iron and copper surfaces reducing long-term corrosion
- Volatile — distributes throughout steam and condensate circuits for complete protection
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