Hydrazinium dichloride

Structural formula
General
Surname	Hydrazinium dichloride
other names	Hydrazonium dichloride diazandiium chloride (IUPAC)
Molecular formula	N 2 H 6 Cl 2
Brief description	light yellow odorless solid
External identifiers / databases
EC number	226-283-2
ECHA InfoCard	100,023,894
PubChem	17548
Wikidata	Q3706993
properties
Molar mass	104.97 g mol −1
Physical state	firmly
density	1.42 g cm −3
Melting point	198 ° C (decomposition)
solubility	very easily soluble in water (2700 g l −1 at 20 ° C, other source 272 g l −1 at 18 ° C); slightly soluble in ethanol;
safety instructions
H and P phrases	H: 301 + 311 + 331-317-350-410
	P: 201-261-273-280-301 + 310-311
Toxicological data	129 mg kg −1 ( LD 50 , rat , oral ) ; 91 mg kg −1 ( LD 50 , rabbit , transdermal ) ;
	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). Template: room group / 205

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 .

[GESTIS-1] ↑ ^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) .

[Werner_Baumann,_Thomas_Rothardt-2] 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).

[Alfa-3] Datasheet Hydrazine dihydrochloride, 98 +% from AlfaAesar, accessed on November 18, 2016 ( PDF )(JavaScript required) .

[Merck-4] Data sheet hydrazinium dichloride (PDF) from Merck , accessed on November 18, 2016.

[B._H._Nicolaisen-5] B. H. Nicolaisen: Manufacture of hydrazine dihydrohalides - US 2978296 A , April 4, 1961, accessed November 16, 2016.

[DOI10.2475/ajs.s5-5.25.15-6] 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 .