4,4'-diaminostilbene-2,2'-disulfonic acid

Structural formula
General
Surname	4,4'-diaminostilbene-2,2'-disulfonic acid
other names	Flavonic acid
Molecular formula	C 14 H 14 N 2 O 6 S 2
Brief description	yellow-brown odorless solid
External identifiers / databases
EC number	201-325-2
ECHA InfoCard	100.001.206
PubChem	6668
ChemSpider	6416
Wikidata	Q21099682
properties
Molar mass	370.40 g mol −1
Physical state	firmly
density	2.45 g cm −3
Melting point	> 300 ° C
solubility	practically insoluble in water (27 mg l −1 at 20 ° C)
safety instructions
GHS labeling of hazardous substances	no GHS pictograms
	no GHS pictograms
H and P phrases	H: 412
	P: 273-501
Toxicological data	> 5000 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 .

4,4'-Diaminostilbene-2,2'-disulfonic acid is a chemical compound from the stilbene group . It is a structural derivative of ethene and has the structural elements of an aromatic amine and benzenesulfonic acid .

Extraction and presentation

4,4'-diaminostilbene-2,2'-disulfonic acid can be obtained by catalytic reduction of 4,4'-dinitrostilbene-2,2'-disulfonic acid .

properties

4,4'-Diaminostilbene-2,2'-disulfonic acid is a crystalline yellow-brown, odorless solid that is practically insoluble in water. The chemical is stable in neutral, acidic, or alkaline solutions and is considered "not readily biodegradable".

use

4,4'-Diaminostilbene-2,2'-disulfonic acid is used as an intermediate for pigments and fluorescent brighteners .

literature

4,4'-diamino-2,2'-stilbene disulfonic acid chemistry from China, Germany, and India . DIANE Publishing, 2003, ISBN 1-4289-5458-9 ( limited preview in Google Book Search).

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g Entry on 4,4′-diaminostilbene-2,2′-disulfonic acid in the GESTIS substance database of the IFA , accessed on November 20, 2018(JavaScript required) .
↑ ^a ^b ^c ^d OECD : Screening Information Dataset (SIDS) Initial Assessment Report (SIAR) for 4,4'- diaminostilbene -2,2'-disulfonic acidTemplate: link text check / apostrophe , accessed on November 20, 2018.
↑ Entry on 4,4′-diaminostilbene-2,2′-disulfonic acid in the Hazardous Substances Data Bank , accessed on November 20, 2018.

[GESTIS-1] ↑ ^a ^b ^c ^d ^e ^f ^g Entry on 4,4′-diaminostilbene-2,2′-disulfonic acid in the GESTIS substance database of the IFA , accessed on November 20, 2018(JavaScript required) .

[INCHEM-2] OECD : Screening Information Dataset (SIDS) Initial Assessment Report (SIAR) for 4,4'- diaminostilbene -2,2'-disulfonic acidTemplate: link text check / apostrophe , accessed on November 20, 2018.

[HSDB-3] Entry on 4,4′-diaminostilbene-2,2′-disulfonic acid in the Hazardous Substances Data Bank , accessed on November 20, 2018.