Amines
REACH
Carbohydrazide
CAS Number
497-18-7
EC Number
207-837-2
What is Carbohydrazide?
Carbohydrazide (CAS 497-18-7), also known as N,N'-diaminourea, is an oxygen scavenger and corrosion inhibitor for industrial water treatment and energy systems.
Where is Carbohydrazide used?
- Process water and boiler systems: removes dissolved oxygen, protecting metal surfaces from oxidative corrosion
- Boiler feedwater treatment: replaces hydrazine as a safer oxygen scavenger, reacting with dissolved oxygen to prevent pitting and corrosion in steam generation systems
- Refineries and oil and gas facilities: protects pipelines and heat exchangers under high-temperature conditions
- Polymer chemistry: cross-linking and curing agent for polyurethane and epoxy systems
- It serves as a catalyst precursor in the synthesis of specialty chemicals and pharmaceutical intermediates.
Commercial specifications
- Standard commercial grades: technical and high-purity
- Purity typically 98% to 99%+
- Packaging: bags and drums
Other Names (Synonyms)
N,N'-diaminourea|N-aminohydrazinecarboxamide|hydrazide hydrazinecarboxylic acid|carbonylbis-hydrazine|carbonic dihydrazide|cabazide|4-aminosemicarbazide|1,3-diaminourea
What are the physical properties of Carbohydrazide?
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℃
How is Carbohydrazide classified and handled safely? Learn More
Warning
GHS07· Irritant GHS09· Environmental Hazard
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.
Which trade and regulatory codes apply to Carbohydrazide?
HS Code 29280000
UN Number 3077
Storage Class 11 - Combustible Solids
WGK (Germany) 3