ChemicalBook CAS DataBase List 7803-57-8

7803-57-8

Name	Hydrazine hydrate
CAS	7803-57-8
EINECS(EC#)	206-114-9
Molecular Formula	H6N2O
MDL Number	MFCD00149931
Molecular Weight	50.06
MOL File	7803-57-8.mol

Synonyms

Diamid hydrate HYDRAZINE HYDRATE Hydrazine hydrate solution 60 (N2H4.H2O) HYDRAZINE MONOHYDRATE HYDRAZINIUM HYDROXIDE DiamideHydrate DiamineHydrate Hydrazinehydrate,50% hydrazinehydroxide idrazinaidrata Diamide monohydrate HYDRAZINE MONOHYDRATE REAGENT GRADE 9& HYDRAZINE HYDRATE SOLUTION APPROX. 80 % HydrazineHydrate80%Gr HydrazineHydrate80% Hydrazinemonohydrate,98+% HYDRAZINE MONOHYDRATE REAGENT HYDRAZINEHYDRATE,TECHNICAL HYDRAZINE1-HYDRATE Hydrazine monohydrate, 99+%

Chemical Properties

Appearance	colourless fuming liquid
Melting point	−51.7 °C(lit.)
Boiling point	120.1 °C(lit.)
density	1.03 g/mL at 20 °C
vapor density	>1 (vs air)
vapor pressure	5 mm Hg ( 25 °C)
refractive index	n20/D 1.428(lit.)
Fp	204 °F
storage temp.	0-6°C
solubility	Acetonitrile (Sparingly), DMSO (Sparingly), Methanol (Slightly), Water (Sparingly)
form	fuming liquid
color	fuming liquid
Specific Gravity	1.032
PH	10-11 (10g/l, H2O, 20℃)
Stability:	Stability Incompatible with a wide variety of materials, including oxidizing agents, heavy metal oxides, dehydrating agents, alkali metals, rust, silver salts. Combustible. Contact with many materials may cause fire or explosive decomposition. May react explosively with a variety of materials, including dehydrating agents, heavy metal ox
explosive limit	>3.4-99%(V)
Water Solubility	Soluble in chloroform, DMSO, methanol. Slightly soluble in water.
Merck	14,4771
BRN	878137
Exposure limits	ACGIH: TWA 0.01 ppm (Skin) OSHA: TWA 1 ppm(1.3 mg/m3) NIOSH: IDLH 50 ppm; Ceiling 0.03 ppm(0.04 mg/m3)
InChI	1S/H4N2.H2O/c1-2;/h1-2H2;1H2
InChIKey	IKDUDTNKRLTJSI-UHFFFAOYSA-N
SMILES	O.NN
CAS DataBase Reference	7803-57-8(CAS DataBase Reference)
EPA Substance Registry System	7803-57-8(EPA Substance)

Safety Data

Symbol(GHS)	GHS02,GHS05,GHS06,GHS08,GHS09
Signal word	Danger
Hazard statements	H226-H301+H311-H314-H317-H330-H350-H410
Precautionary statements	P210-P273-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338
Hazard Codes	T,N
Risk Statements	R45:May cause cancer. R20/21/22:Harmful by inhalation, in contact with skin and if swallowed . R34:Causes burns. R43:May cause sensitization by skin contact. R51/53:Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment . R50/53:Very Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment . R23/24/25:Toxic by inhalation, in contact with skin and if swallowed . R10:Flammable. less more
Safety Statements	S53:Avoid exposure-obtain special instruction before use . S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) . S60:This material and/or its container must be disposed of as hazardous waste . S61:Avoid release to the environment. Refer to special instructions safety data sheet . less more
RIDADR	UN 3293 6.1/PG 3
WGK Germany	3
RTECS	MV8050000
F	23
Autoignition Temperature	280 °C
TSCA	Yes
HazardClass	8
PackingGroup	II
HS Code	28251000
Storage Class	3 - Flammable liquids
Hazard Classifications	Acute Tox. 2 Inhalation Acute Tox. 3 Dermal Acute Tox. 3 Oral Aquatic Acute 1 Aquatic Chronic 1 Carc. 1B Eye Dam. 1 Flam. Liq. 3 Skin Corr. 1B Skin Sens. 1
Toxicity	LD50 orally in Rabbit: 169 mg/kg less more

Raw materials And Preparation Products

Hazard Information

General Description

A colorless fuming liquid with a faint ammonia-like odor. Corresponds to a 64% aqueous solution of hydrazine in water. Combustible but may require some effort to ignite. Contact with oxidizing materials may cause spontaneous ignition. Toxic by inhalation and by skin absorption. Corrosive to tissue. Produces toxics oxides of nitrogen during combustion.

Reactivity Profile

HYDRAZINE HYDRATE(7803-57-8) is a base and a very powerful reducing agent. Very corrosive. Violent reaction on contact with alkali metals (sodium, potassium), 2,4-dinitrochlorobenzene, tin dichloride, mercury oxide. Vigorous neutralization reaction with acids. Emits toxic fumes of nitrogen oxides when heated to decomposition [Lewis, 3rd ed., 1993, p. 680]. Reacts with tin(II) chloride to give tin(II) dihydrazine chloride, which decomposes explosively when heated [Mellor 7:430(1946-1947)]. Reacts exothermically and violently with 2,4-dinitrochlorobenzene [Wischmeyer (1967)].

Air & Water Reactions

Fumes in air. Water soluble.

Hazard

See hydrazine.

Health Hazard

TOXIC; inhalation, ingestion or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.

Fire Hazard

Combustible material: may burn but does not ignite readily. When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion hazards. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. Runoff may pollute waterways. Substance may be transported in a molten form.

Chemical Properties

colourless fuming liquid

Physical properties

Colorless fuming liquid; faint odor; refractive index 1.4284; density 1.032g/mL; boils at 119°C; solidifies at -51.7°C; miscible with water and alcohol;insoluble in chloroform, methylene chloride, and ether.

Definition

ChEBI: Hydrazine hydrate is a hydrate. It contains a hydrazine.

Purification Methods

It is best obtained by heating hydrazine sulphate (200g), NaOH (160g) and H2O (75mL, exothermic) in a copper flask under reflux for 1.5hours then distilled off (using a flame to remove all the hydrazine). The distillate (175mL) is a clear liquid which contains ~40-45% of N2H4. Note that hydrazine attacks glass, rubber and cork, and stainless steel equipment should be used. The percentage of hydrazine is determined by titration with standard acid (methyl orange indicator) or against standard iodine (starch indicator). Hydrazine monohydrate should contain 64% of N2H4. The ~40-45% solution may be concentrated by mixing it (144mL) with xylene (230mL) and distilling it through an efficient fractionating column (e.g. Hempel column, p 10). All the xylene passes over with about 85mL of H2O. On distilling the residue, hydrated hydrazine (50mL) is obtained containing 80-85% of N2H4. This can be diluted with conductivity H2O to 64% N2H4 to give the monohydrate. Hydrazine and its hydrates have VERY IRRITATING and TOXIC vapours and should be used in an efficient fume cupboard. [Schenk in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I pp 469-472 1963.]

Material Safety Data Sheet(MSDS)

Spectrum Detail

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