Hydrazinium dichloride
Structural formula | ||||||||||||||||
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General | ||||||||||||||||
Surname | Hydrazinium dichloride | |||||||||||||||
other names |
Hydrazonium dichloride diazandiium chloride (IUPAC) |
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Molecular formula | N 2 H 6 Cl 2 | |||||||||||||||
Brief description |
light yellow odorless solid |
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properties | ||||||||||||||||
Molar mass | 104.97 g mol −1 | |||||||||||||||
Physical state |
firmly |
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density |
1.42 g cm −3 |
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Melting point |
198 ° C (decomposition) |
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solubility |
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safety instructions | ||||||||||||||||
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Toxicological data | ||||||||||||||||
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Hydrazinium dichloride is a chemical compound from the group of hydrazinium salts .
Extraction and presentation
Hydrazinium dichloride can be obtained by reacting hydrazine with hydrochloric acid in a special process, since the reaction usually results in hydrazinium chloride or a mixture of both compounds.
properties
Hydrazinium dichloride is a non-flammable, light yellow, odorless solid. When heated above about 198 ° C it decomposes into hydrazinium chloride and hydrogen chloride . Its aqueous solution reacts strongly acidic. The compound has a cubic crystal structure with the space group Pa 3 (space group no. 205) (a = 1.249 nm, b = 2.185 nm, c = 0.441 nm).
use
Hydrazine dihydrochloride is used as a chlorine scavenger in hydrogen chloride gas streams. In the photo industry it is used as a developer additive to increase the developer speed. It was also used in copper and brass cleaning agents in the past .
Individual evidence
- ↑ a b c d e f g h Entry on hydrazinium dichloride in the GESTIS substance database of the IFA , accessed on January 10, 2017(JavaScript required) .
- ↑ a b Werner Baumann, Thomas Rothardt: Printing chemicals data and facts on environmental protection 2nd, expanded and revised edition . Springer-Verlag, 2013, ISBN 978-3-642-58474-9 , pp. 585 ( limited preview in Google Book search).
- ↑ a b Datasheet Hydrazine dihydrochloride, 98 +% from AlfaAesar, accessed on November 18, 2016 ( PDF )(JavaScript required) .
- ↑ a b Data sheet hydrazinium dichloride (PDF) from Merck , accessed on November 18, 2016.
- ↑ a b c B. H. Nicolaisen: Manufacture of hydrazine dihydrohalides - US 2978296 A , April 4, 1961, accessed November 16, 2016.
- ↑ RWG Wyckoff: The crystal structure of hydrazine dihydrochloride. In: American Journal of Science. s5-5, 1923, p. 15, doi : 10.2475 / ajs.s5-5.25.15 .