Overview
Carbohydrazide (CAS 497-18-7 ), also known as N,N'-diaminourea, is an oxygen scavenger and corrosion inhibitor used across industrial water treatment and energy systems. It removes dissolved oxygen from process water and boiler systems, protecting metal surfaces from oxidative corrosion.
In boiler feedwater treatment, this compound replaces hydrazine as a safer oxygen scavenger, reacting with dissolved oxygen to prevent pitting and corrosion in steam generation systems. This application is critical for maintaining the integrity of high-pressure equipment.
Refineries and oil and gas facilities use it to protect pipelines and heat exchangers operating under high-temperature conditions. Its ability to passivate metal surfaces makes it an essential component in heavy industrial maintenance and protection protocols.
In polymer chemistry, it functions as a cross-linking and curing agent for polyurethane and epoxy systems. This application improves the mechanical performance and chemical resistance of the final material, ensuring durability in demanding environments.
It also serves as a catalyst precursor in the synthesis of specialty chemicals and pharmaceutical intermediates. Its versatile chemical structure allows for precise reactions in complex organic synthesis and specialized manufacturing processes.
The product is supplied as a white crystalline powder to meet various industrial requirements. Standard commercial grades include technical and high-purity specifications, with purity levels typically ranging from 98% to 99%+.
Quality control ensures the material meets rigorous industrial benchmarks for consistency and performance. Packaging is available in bags and drums suited to industrial procurement volumes, ensuring safe transport and storage for large-scale operations.
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Physical Properties
| Melting Point | 154 °C |
| Boiling Point | 167.26°C (rough estimate) |
| Density | 1.3338 g/cm³ |
| Appearance | white powder |
| Color | White |
| Form | Crystalline Powder |
| Water Solubility | Soluble in water. |
| Vapor Pressure | 0Pa at 25℃ |
| Refractive Index | 1.4164 (estimate) |
| Log P | -2.94 at 21.6℃ |
Safety & Handling
Warning GHS07 GHS09 Hazard Statements H302 Harmful if swallowed H315 Causes skin irritation H317 May cause an allergic skin reaction H319 Causes serious eye irritation H335 May cause respiratory irritation H411 Toxic to aquatic life with long lasting effects Precautionary Statements P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P272 Contaminated work clothing should not be allowed out of the workplace. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P330 Rinse mouth. P391 Collect spillage. P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P301+P317 Get emergency medical help. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P332+P317 Get emergency medical help. P333+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 29280000 |
| UN Number | 3077 |
| Storage Class | 11 - Combustible Solids |
| WGK (Germany) | 3 |
Other Names
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Chemical Properties
- CAS Number
- 497-18-7
- EC Number
- 207-837-2
- Mol. Weight
- 90.09
- HS Code
- 29280000
- Category
- Amines