Гидразингидрат (1:1)

Description

Hydrazine hydrate (1:1) is a compound of hydrazine with water with the composition N2H4·H2O, the main commercial form of hydrazine. Colorless, fuming liquid with a faint ammonia odor. Compared to anhydrous hydrazine, hydrazine is less hazardous to handle, but remains flammable, corrosive and toxic. The industry produces solutions of different concentrations, most often 40, 64, 80 and 100% in terms of hydrate.

Basic Attributes

• CAS No: 7803-57-8
• Chemical Formula: H4N2 H2O
• Molecular Weight: 50.06
• Exact weight: 50.048012
• EU number: 206-114-9
• HS code: 28251000
• PSA Specifications: 53
• XLogP3: 0.15510

Physico-chemical characteristics

• Appearance: colorless, fuming liquid with a faint odor of ammonia
• Density: 1.03 g/ml at 20 °C
• Melting point: −51.7 °C
• Boiling point: 59–67 °C at 70 Torr pressure
• Flash point: 204°F (approx. 96°C)
• Refractive index: n20/D 1.428 (literature data)
• Solubility: chloroform, DMSO, methanol; in water the solubility on the card is marked as weak
• Steam pressure: 5 mm Hg. Art. at 25 °C
• Vapor density: more than 1 relative to air
• Explosion limits: over 3.4% to 99% by volume
• Storage conditions: 0–6 °C

Toxicity

• Oral, rats, LD50: 129 mg/kg
• Oral, mice, LD50: 83 mg/kg

Scope of application

• oxygen absorber in the feed water of steam boilers at thermal and nuclear power plants - protection of the steam-water path from oxygen corrosion
• raw materials for chemical blowing agents (azodicarbonamide and analogues) in the production of polymer foams and microporous rubber
• reducing agent in solutions of chemical nickel plating, copper plating and deposition of precious metals
• synthesis of active ingredients of pesticides and pharmaceutical substances through hydrazides, hydrazones and nitrogenous heterocycles - pyrazoles, triazoles, pyridazines
• preparation of hydrazine salts and derivatives, including sulfate and hydrochloride
• reduction in fine organic synthesis, including reduction of nitro groups and the Wolff-Kizhner reaction
• component of rocket fuels and working substance of single-component engines

Safety Information

• Hazard Statements: The section on the original card is broken off at H301 (toxic if swallowed); the full list is taken from the supplier's safety data sheet
• Precautionary Statements: P201, P202, P260, P261, P264, P270, P271, P272, P280, P281, P301 + P310, P301 + P330 + P331, P302 + P352, P303 + P361 + P353, P304 + P340, P305 + P351 + P338, P308 + P313, P310, P311, P312, P314, P321, P322, P330, P333 + P313, P361, P363, P403 + P233, P405, P501
• Packing level: II
• Hazard category: 8
• Transport codes: UN 3293, class 6.1, page 3
• WGK Germany: 3
• Hazard class code: 45-20/21/22-34-43-51/53-50/53-23/24/25-10
• Safety instructions: 53-45-60-61-36/37/39-26
• RTECS number: MV8050000
• Tags: T, N

Stability and incompatibility

The substance is flammable; It ignites easily, reacts violently with oxidizing agents, and toxic vapors of nitrogen oxides are released during combustion. The list of incompatible materials is wide: oxidizing agents, heavy metal oxides, dehydrating agents, alkali metals, rust, silver salts. Contact with certain materials will cause fire or explosive decomposition. The description of this item in the original product card ends with words about heavy metal oxides.

Storage and transportation

Storage temperature 0–6 °C. The warehouse is ventilated, dry, at low temperature, separated from oxidizing agents and acids. Containers made of stainless steel or compatible polymers, rusty containers are unacceptable: corrosion products catalyze decomposition. Transport under UN 3293 as hydrazine solution. Work should be carried out in a fume hood, wearing gloves and safety glasses; collect wastewater separately, codes 50/53 and 51/53 indicate a danger to the aquatic environment.