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Hydrazine

Hydrazine structure

CAS No:
302-01-2
Formula:
H4N2
Chemical Name:
Hydrazine
Synonyms:
Hydrazine;Levoxine;Oxytreat 35;Nitrogen hydride (N2H4);H 70 (fuel);H 70;119775-10-9;31886-26-7;75013-58-0;78206-91-4
Categories:
Organic Chemistry > Hydrazine or Hydroxylamine Derivatives

Description

Hydrazine is a colorless flammable liquid with strong toxicity and instability, and combines easily in the air with water molecules to form hydrazine hydrate. It is also very important for industrial uses such as rocket fuel, photographic development, and in fuel cells.

Hydrazine is the simplest diamine in its class of compounds and may be thought of as derived from ammonia by replacement of a hydrogen atom by the – NH2 group. The hydrated hydrazine, N2H4.H2O was first prepared by

Hydrazine Basic Attributes

Molecular Weight：

32.05

Exact Mass：

32.05

EC Number：

206-114-9

HScode：

28251090

Characteristics

PSA：

XLogP3：

-2.1

Appearance：

Clear colorless Liquid

Density：

1.146 g/cm³ @ Temp: -5 °C

Melting Point：

2.0 °C

Boiling Point：

113.5 °C @ Press: 760 Torr

Flash Point：

−4 °F

Refractive Index：

n20/D 1.47(lit.)

Water Solubility：

miscible with H2O and the following alcohols: methyl, ethyl, propyl, isobutyl [MER06]

Storage Conditions：

2-8°C

Vapor Pressure：

5 mm Hg ( 25 °C)

Vapor Density：

>1 (vs air)

Toxicity：

Oral-Rat LD50: 60 mg/kg; Oral-Mouse LD50: 59 mg/kg

Flammability characteristics：

Combustible in case of high heat, open flame, oxidant; decomposition of toxic nitrogen compound gas by heat

Explosive limit：

99.99%

Odor：

Penetrating odor resembling ammonia.

PH：

Aqueous solutions of hydrazine are highly alkaline. pH of a 64 wt% aqueous solution of hydrazine is 12.75.

Safety Information

Packing level：

Hazard category：

Transport codes：

UN 3293 6.1/PG 3

wgk germany：

hazard class code：

45-23/24/25-34-43-50/53-10-51/53-36/37/38-20/21/22-19-11-36/38

safety instructions：

53-26-36/37-45-61-60-36/37/39-16

RTECS Number：

MU7175000

Marks：

T,N,F

Storage features：

The warehouse is ventilated, low temperature and dry; stored separately from oxidants and acids.

Explosive characteristics：

Explosive when burning

Stability/Shelf Life：

Stability May be an explosion hazard, particularly if heated. Incompatible with sources of ignition, light, shock, strong oxidizing agents, strong acids, metal oxides, nitrous oxide, hydrogen peroxide, most common metals, organic materials, porous materials such as wood, paper, asbestos, soil or rust. Many types of metal may cause rapid d

Precautionary statement(s)：

P201-P210-P280-P308 + P313-P370 + P378-P403 + P235

Hazard Statements：

H225-H302 + H332-H315-H317-H319-H335-H350-H410

Toxicity

Toxicity class：

highly toxic

Hydrazine Use and Manufacturing

Methods of Manufacturing

The dehydrating agent method mixes caustic soda with 50%-54% hydrazine hydrate (mass ratio 10:8), gradually blows in nitrogen to remove air, heats up to a temperature of lye close to 118°C, and cools to 60 after the caustic soda is completely dissolved At about ℃, vacuum distillation is carried out until the distillate contains 90%-94% hydrazine, and after fractional distillation, the water is removed, and then condensed to obtain 98%-99.5% anhydrous hydrazine. Extractive dehydration method fractionally distill the hydrazine hydrate solution to distill out water until the water and hydrazine reach azeotrope (68% hydrazine), then fractionate the solution twice, add aniline to change its boiling point, distill the aniline and water, and condense the recovered aniline from the water It can be recycled and reused, and the second fractionated liquid is fractionated three times to obtain anhydrous hydrazine.

Uses

Used for ICP-AES, AAS, AFS, ICP-MS, ion chromatography, etc. Standard solution for titration analysis.

Computed Properties

Molecular Weight:32.046
XLogP3:-1.5
Hydrogen Bond Donor Count:2
Hydrogen Bond Acceptor Count:2
Exact Mass:32.037448136
Monoisotopic Mass:32.037448136
Topological Polar Surface Area:52
Heavy Atom Count:2
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes

Material

Ammonia

Sodium hypochlorite

Hydrogen peroxide

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