1,1-hydrazodiformamide

Structural formula
General
Surname	1,1-hydrazodiformamide
other names	Hydrazodicarbonamide; Biurea;
Molecular formula	C 2 H 6 N 4 O 2
Brief description	white odorless solid
External identifiers / databases
EC number	203-747-2
ECHA InfoCard	100.003.408
PubChem	8039
Wikidata	Q4919204
properties
Molar mass	118.10 g mol −1
Physical state	firmly
density	0.83 g cm −3
Melting point	247–250 ° C (decomposition)
solubility	very sparingly soluble in water (0.4 g l −1 at 25 ° C)
safety instructions
GHS labeling of hazardous substances	no GHS pictograms
	no GHS pictograms
H and P phrases	H: no H-phrases
	P: no P-phrases
Toxicological data	> 2000 mg kg −1 ( LD 50 , rat , oral )
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

1,1-hydrazodiformamide is a chemical compound from the group of hydrazine and urea derivatives .

Extraction and presentation

1,1-hydrazodiformamide can be obtained by reacting urea with hydrazine , or hydrazine sulfate with potassium cyanate in glacial acetic acid:

{\ displaystyle {\ ce {N2H4 * H2SO4 + 2 KOCN -> C2H6N4O2 + K2SO4}}}

It is also formed as a breakdown product of azodicarbonamide , which was used as an additive in flour .

properties

1,1-hydrazodiformamide is a flammable, hardly flammable, white, odorless solid that is very sparingly soluble in water and almost insoluble in ethanol and diethyl ether . It has a monoclinic crystal structure with the space group C 2 / c (space group no. 15) . Template: room group / 15

use

1,1-hydrazodiformamide is used as a high-temperature blowing agent for expanding plastics such as polypropylene and as an intermediate for chemicals (e.g. azodicarbonamide ).

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ Entry on 1,1-hydrazodiformamide in the GESTIS substance database of the IFA , accessed on December 13, 2016(JavaScript required) .
^ Paul R. Russell, Alec N. Strachan: The thermal decomposition of biurea. In: Journal of the Chemical Society, Perkin Transactions 2. 1978, p. 323, doi : 10.1039 / P29780000323 .
↑ Entry on 1,1-hydrazodiformamide in the Hazardous Substances Data Bank , accessed on December 13, 2016.
↑ ^a ^b L. F. Audrieth and Elizabeth B. Mohr: Biurea . In: JC Bailar, Jr. (Ed.): Inorganic Syntheses . tape 4 . McGraw-Hill, Inc., 1953, pp. 26-28 (English).
↑ inchem.org: 054. Azodicarbonamide (FAO Nutrition Meetings Report Series 40abc) , accessed December 13, 2016.
^ ^A ^b D. S. Brown, PR Russell: The crystal and molecular structure of biurea. In: Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry. 32, p. 1056, doi : 10.1107 / S0567740876004652 .

[GESTIS-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ Entry on 1,1-hydrazodiformamide in the GESTIS substance database of the IFA , accessed on December 13, 2016(JavaScript required) .

[DOI10.1039/P29780000323-2] Paul R. Russell, Alec N. Strachan: The thermal decomposition of biurea. In: Journal of the Chemical Society, Perkin Transactions 2. 1978, p. 323, doi : 10.1039 / P29780000323 .

[HSDB-3] Entry on 1,1-hydrazodiformamide in the Hazardous Substances Data Bank , accessed on December 13, 2016.

[IS4-4] L. F. Audrieth and Elizabeth B. Mohr: Biurea . In: JC Bailar, Jr. (Ed.): Inorganic Syntheses . tape 4 . McGraw-Hill, Inc., 1953, pp. 26-28 (English).

[inchem.org-5] .org: 054. Azodicarbonamide (FAO Nutrition Meetings Report Series 40abc) , accessed December 13, 2016.

[DOI10.1107/S0567740876004652-6] A ^b D. S. Brown, PR Russell: The crystal and molecular structure of biurea. In: Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry. 32, p. 1056, doi : 10.1107 / S0567740876004652 .