3,4-dinitrocatechol

Structural formula
General
Surname	3,4-dinitrocatechol
other names	3,4-dinitro-1,2-dihydroxybenzene; 3,4-dinitro-1,2-benzenediol;
Molecular formula	C 6 H 4 N 2 O 6
External identifiers / databases
PubChem	5493211
ChemSpider	4591348
Wikidata	Q222995
properties
Molar mass	200.11 g · mol -1
Physical state	firmly
Melting point	82 ° C (dihydrate); 147–148 ° C (anhydrate);
pK s value	pK s 1 = 4.02; pK s 2 = 8.24;
solubility	soluble in ethanol and acetone
safety instructions
GHS hazard labeling ; no classification available
GHS hazard labeling ; no classification available
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

3,4-Dinitrocatechol is a chemical compound that belongs to both the phenol group and the aromatic nitro group. 3,4-dinitrocatechol crystallizes as a dihydrate.

presentation

3,4-Dinitrocatechol can be made from catechol by reacting with sodium nitrite and sulfuric acid.

Derivatives

The methylation of 3,4-dinitropyrocatechol leads to different ethers, the melting points of which are listed in the table below.

Methyl ether of 3,4-dinitrocatechol
Structural formula
Common name	5,6-dinitroguaiacol	3,4-dinitroguaiacol	3,4-dinitroveratrol
CAS number			71089-33-3
molar mass	214.1	214.1	228.1
Melting point	205-208 ° C (dec.)	109.5-110 ° C	90.5 ° C

use

3,4-Dinitrocatechol is used in the photometric determination of vanadium .

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g J. Buckingham: Dictionary of organic compounds , Volume 9, p. 2767. ( limited preview in the Google book search)
↑ ^a ^b ^c ^d D. H. Rosenblatt, J. Epstein, M. Levitch: Some Nuclearly Substituted Catechols and their Acid Dissociation Constants , in: J. Am. Chem. Soc. , 1953 , 75 (13), pp. 3277-3278; doi : 10.1021 / ja01109a511 .
↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

[DOC-1] ↑ ^a ^b ^c ^d ^e ^f ^g J. Buckingham: Dictionary of organic compounds , Volume 9, p. 2767. ( limited preview in the Google book search)

[Rosenblatt-2] D. H. Rosenblatt, J. Epstein, M. Levitch: Some Nuclearly Substituted Catechols and their Acid Dissociation Constants , in: J. Am. Chem. Soc. , 1953 , 75 (13), pp. 3277-3278; doi : 10.1021 / ja01109a511 .

[NV-3] This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.