Hydrazine hydrate (pinyin: j ǐ ng), also known as hydrazine hydrate, is an inorganic compound with the chemical formula NtwoHfour·HtwoO，It is a colorless transparent smoking liquid with light ammonia smell, smokes in wet air, and is strongly alkaline and hygroscopic.Under normal pressure, hydrazine can form azeotrope with water (hydrazine content in azeotrope is about 69%).Hydrazine hydrate liquid exists in the form of dimer, which is miscible with water and ethanol, and insoluble in ether and chloroform;It can erode glass, rubber, leather, cork, etc., and decompose into N under high temperaturetwo、NHthreeAnd Htwo；Hydrazine hydrate has strong reducibility, and it is compatible with halogen and HNOthree、KMnOfourIt can absorb CO in the airtwo, producing smoke.Hydrazine hydrate and its derivatives are widely used in many industrial applications, such as reducing agent, antioxidant, medicine, foaming agent, etc.
Listed in the List of Explosive Hazardous Chemicals[2]，It shall be controlled in accordance with the Public Security Management Measures for Explosive Hazardous Chemicals[3]。
Chinese name
Hydrazine hydrate
Foreign name
Hydrazine hydrate
Alias
Hydrazine hydrate
chemical formula
NtwoHfour·HtwoO
molecular weight
fifty point zero six one
CAS login number
10217-52-4
EINECS login number
206-114-9
Melting point
-51.7 ℃
Boiling point
120.1 ℃
Water solubility
Soluble
Density
1.032 g/cm³
Appearance
Colorless transparent fuming liquid
Flash point
72.8 ℃
Security description
S45；S53；S60；S61
Hazard symbol
T；N
Hazard description
R23/24/25；R34；R43；R45；R50/53
UN dangerous goods number
three thousand two hundred and ninety-three
MDL No
MFCD00149931
RTECS No
MV8050000
BRN No
eight hundred and seventy-eight thousand one hundred and thirty-seven
PubChem No
twenty-four million eight hundred and fifty-two thousand four hundred and eighty-two
Solubility: freely miscible with water and ethanol, insoluble in ether and chloroform[4]
Molecular structure data
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Molar refractive index: 9.11
Molar volume (cmthree/mol）：35.8
Isotonic specific volume (90.2K): 90.2
Surface tension (dyne/cm): 39.9
Polarization (10-24cmthree）：3.61[4]
Calculate chemical data
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Reference value for drainage parameter calculation (XlogP): None
Number of hydrogen bond donors: 3
Number of hydrogen bond receptors: 3
Number of rotatable chemical bonds: 0
Number of tautomers: 0
Topological molecular polar surface area: 53
Number of heavy atoms: 3
Surface charge: 0
Complexity: 0
Number of isotope atoms: 0
Determine the number of atomic structure centers: 0
Number of uncertain atomic structure centers: 0
Determine the number of chemical bond structure centers: 0
Number of uncertain chemical bond structure centers: 0
Number of covalent bond units: 2[4]
purpose
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Hydrazine hydrate, as an important fine chemical raw material, is mainly used to synthesize foaming agents such as AC, D1PA, TSH, etc;It is also used as cleaning agent for deoxidation and decarbonization of boilers and reactors;It is used in the pharmaceutical industry to produce anti tuberculosis and anti diabetes drugs;In the pesticide industry, it is used to produce herbicides, plant growth regulators and bactericides, insecticides and rodenticides;In addition, it can also be used to produce rocket fuel, diazo fuel, rubber additives, etc.
Hydrazine hydrate and its derivatives are widely used in many industrial applications, such as chemical products, pharmaceutical products, agricultural chemical products, water treatment, photography and photographic products, etc. They are used as reducing agents, antioxidants, and used to produce medicines, foaming agents, etc.[1]
Hydrazine hydrate can also be used in the following fields:
1. Cleaning and refining of precious metals.
2. Recovered metal from pickling solution and surface treatment solution.
3. Dispose of waste liquid and waste gas.
4. Purification of various grades of refined sulfuric acid used in the electronic market.
5. Metal inlay of plastic and metal (nickel, cobalt, iron, chromium, etc.).
6. It is the formula product of rocket fuel.
7. It is used in the ACTIRED process, which is mainly used for gold ore dressing.
Emergency Management
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Leakage emergency treatment
Evacuate the personnel in the leakage contaminated area to the safety area, prohibit irrelevant personnel from entering the contaminated area, and suggest that emergency personnel wear self-contained breathing apparatus and chemical protective clothing.Do not contact the leakage directly, and stop the leakage under the condition of ensuring safety.Spray water to reduce evaporation.Use dry ice carbon dioxide fire extinguisher or mix it with sand or other incombustible adsorbent, and then collect and transport it to the waste disposal site for disposal.It can also be washed with a large amount of water, and the diluted washing water is put into the wastewater system.In case of a large amount of leakage, the dike shall be used to collect it, and then it shall be collected, transferred, recycled or discarded after harmless treatment.
Protective measures
Respiratory system protection: gas masks should be worn in case of possible exposure to vapor or smoke.Wear self-contained breathing apparatus during emergency rescue or escape.
Eye protection: wear chemical safety goggles.
Protective clothing: wear work clothes (made of anti-corrosion materials).
Hand protection: wear rubber gloves.
Others: After work, take a shower and change clothes.Store the clothes contaminated by poisons separately and reuse them after washing.Pay attention to personal hygiene.
First aid measures
Skin contact: Take off contaminated clothes immediately, and wash thoroughly with flowing water immediately.
Eye contact: immediately lift the eyelids and flush with flowing water or normal saline for at least 15 minutes.Get medical attention.
Inhalation: quickly leave the site to a place with fresh air.Give oxygen when breathing is difficult.When breathing stops, perform artificial respiration immediately.Get medical attention.
Ingestion: Drink milk or egg white for those who take it by mistake.Get medical attention immediately.
security information
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Safety terminology
S45：In case of accident or if you feel unwell, seek medical advice immediately (show the lable where possible).
In case of an accident or feeling unwell, seek medical advice immediately (show the label if possible).
S53：Avoid exposure - obtain special instructions before use.
Avoid contact and obtain special instructions before use.
S60：This material and/or its container must be disposed of as hazardous waste.
The substance and its container must be disposed of as hazardous waste.
S61：Avoid release to the environment. Refer to special instructions/Safety data sheets.
Avoid releasing into the environment, refer to special instructions/safety receipt instructions.
Risk terminology
R23/24/25：Toxic by inhalation, in contact with skin and if swallowed.
Toxic by inhalation, in contact with skin, and if swallowed.
R34：Causes burns.
Causes burns.
R43：May cause sensitization by skin contact.
Skin contact may cause irritation.
R45：May cause cancer.
May cause cancer.
R50/53：Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
It is extremely toxic to aquatic organisms and may cause long-term adverse effects in the aquatic environment.
