o-Dianisidine

O-Dianisidine
Names
	IUPAC name 4-(4-amino-3-methoxyphenyl)-2-methoxyaniline
	Other names 2,2'-dimethoxy-4,4’-benzidine
Identifiers
CAS Number	119-90-4;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:82321;
ChEMBL	ChEMBL398363;
ChemSpider	8104;
ECHA InfoCard	100.003.960
EC Number	204-355-4;
KEGG	C19231;
PubChem CID	8411;
RTECS number	DD0875000;
UNII	MJY508JZXV;
UN number	2811, 2431, 3077
CompTox Dashboard (EPA)	DTXSID3025091 ;
	InChI InChI=1S/C14H16N2O2/c1-17-13-7-9(3-5-11(13)15)10-4-6-12(16)14(8-10)18-2/h3-8H,15-16H2,1-2H3 Key: JRBJSXQPQWSCCF-UHFFFAOYSA-N;
	SMILES COC1=C(C=CC(=C1)C2=CC(=C(C=C2)N)OC)N;
Properties
Chemical formula	C14H16N2O2
Molar mass	244.294 g·mol−1
Appearance	White solid
Density	1.178 g/cm3
Melting point	113 °C (235 °F; 386 K)
Boiling point	356 °C (673 °F; 629 K)
Solubility in water	60 mg/l
Hazards
GHS pictograms
GHS Signal word	Danger
GHS hazard statements	H302, H350
GHS precautionary statements	P201, P202, P264, P270, P281, P301+312, P308+313, P330, P405, P501
Flash point	206°C
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
	Infobox references

o-Dianisidine is an organic compound with the formula [(CH₃O)(H₂N)C₆H₃]₂. A colorless or white solid, it is a bifunctional compound derived via the benzidine rearrangement from o-anisidine.

o-Dianisidine is a precursor to some azo dyes by formation of the bis(diazonium) derivative, which is coupled to diverse aromatic compounds. Some commercial dyes derived from o-dianisidine include C. I. Direct Blue 1, 15, 22, 84, and 98.[1]

o-Dianisidine is also used in assaying activity of peroxidase in lab. The general reaction of a peroxidase is as follows.

{\ce {ROOR'+{\overset {electron \atop donor}{2e^{-}}}+2H+->[{\ce {Peroxidase}}]{ROH}+R'OH}}

Where the ROOR' can be hydrogen peroxide, and the electron doner be o-dianisidine.

Direct Blue 1 is commercial dye, a derivative of o-dianisidine.

Safety

The manufacture and degradation of o-dianisidine, like other benzidene derivatives, has attracted regulatory attention.[2] It is also used as a reagent in biochemistry in testing for peroxides.

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References

Klaus Hunger; Peter Mischke; Wolfgang Rieper; Roderich Raue; Klaus Kunde; Aloys Engel (2005). "Azo Dyes". Ullmann’s Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a03_245..
Golka, Klaus; Kopps, Silke; Myslak, Zdislaw W. (2004). "Carcinogenicity of Azo Colorants: Influence of Solubility and Bioavailability". Toxicology Letters. 151: 203–210. doi:10.1016/j.toxlet.2003.11.016. PMID 15177655.CS1 maint: uses authors parameter (link)

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[Ullmann-1] Klaus Hunger; Peter Mischke; Wolfgang Rieper; Roderich Raue; Klaus Kunde; Aloys Engel (2005). "Azo Dyes". Ullmann’s Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a03_245..

[2] Golka, Klaus; Kopps, Silke; Myslak, Zdislaw W. (2004). "Carcinogenicity of Azo Colorants: Influence of Solubility and Bioavailability". Toxicology Letters. 151: 203–210. doi:10.1016/j.toxlet.2003.11.016. PMID 15177655.CS1 maint: uses authors parameter (link)