Carbohydrazide Oxygen Scavenger
CAS Number: 497-18-7
Carbohydrazide (CHZ) is an organic oxygen scavenger and metal passivator used as a safer alternative to hydrazine in high-pressure boiler and steam generation systems. It decomposes at elevated temperatures to yield nitrogen and water, with no harmful residuals, while also passivating iron and copper surfaces to form protective magnetite/cuprous oxide films.
Technical Specifications
| appearance | White to off-white crystalline powder |
| dosage vs O2 | 3.5–4.0 mg CHZ per mg O2 |
| melting point | 153–154°C |
| moisture content | ≤0.5% |
| pH 1pct solution | 6.5–7.5 |
| carbohydrazide content | ≥98.0% |
Applications
- High-pressure boiler feedwater oxygen scavenging
- Steam turbine condensate system protection
- Combined cycle power plant steam circuit treatment
- Nuclear power plant secondary circuit oxygen control
- Industrial boiler systems replacing hydrazine
Key Features
- Non-carcinogenic hydrazine replacement — accepted in food-grade steam applications
- Decomposes cleanly to N2 and H2O — no toxic by-products
- Dual role: oxygen scavenger and metal surface passivator
- Compatible with all-volatile treatment (AVT) programs in power generation
Send Inquiry
More in Specialty Water Treatment Chemicals
1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP)
2809-21-4
Aluminum Sulfate Coagulant (Alum)
10043-01-3
Anionic Polyacrylamide Flocculant
9003-05-8
Anthracite Filter Media
68909-21-7
Bronopol Industrial Water Treatment Biocide
52-51-7
CMIT/MIT Blend Biocide (1.5%)
26172-55-4
CO2 pH Adjustment System for Water Treatment
Cationic Polyacrylamide Flocculant