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CAS 20325-40-0

CAS 20325-40-0 matches 0 EU annex records across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 20325-40-0
CAS 20325-40-0PubChem CID 62311

o-Dianisidine dihydrochloride

IUPAC name
4-(4-amino-3-methoxyphenyl)-2-methoxyaniline;dihydrochloride
Molecular formula
C14H18Cl2N2O2
Molecular weight
317.2 g/mol
Exact mass
316.0745332 Da
Topological polar surface area
70.5 Ų
Hydrogen-bond donors
4
Hydrogen-bond acceptors
4
Covalent units
3
Defined stereocentres
0

Also known as

3,3'-DIMETHOXYBENZIDINE DIHYDROCHLORIDEdianisidine dihydrochlorideCCRIS 998QV96QA6UKKEINECS 243-737-5Benzidine, 3,3'-dimethoxy-, dihydrochloride[1,1'-Biphenyl]-4,4'-diamine, 3,3'-dimethoxy-, dihydrochloride3,3'-Dimethoxy-4,4'-diaminobiphenyl dihydrochloride
16 more reported names
3,3'-Dimethoxybiphenyl-4,4'-ylenediammonium dichloride3,3'-Dimethoxy-(1,1-biphenyl)-4,4'-diamine dihydrochlorideEC 243-737-5(1,1'-Biphenyl)-4,4'-diamine, 3,3'-dimethoxy-, dihydrochloride(1,1'-Biphenyl)-4,4'-diamine, 3,3'-dimethoxy-, hydrochloride (1:2)[1,1'-Biphenyl]-4,4'-diamine, 3,3'-dimethoxy-, hydrochloride (1:2)ci disperse black 6 dihydrochlorideRefChem:855243o-Dianisidine (dihydrochloride)C.I. Disperse Black 6 dihydrochloride3,3'-Dimethoxybenzidine.2HClo-Dianisidine HClFast Blue B.2HCl3,3-DIMETHOXYBENZIDINE DIHYDROCHLORIDEo-Dianisidine (hydrochloride)[4-(4-azaniumyl-3-methoxyphenyl)-2-methoxyphenyl]azanium;dichloride
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External database identifiers

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

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How CAS 20325-40-0 is used on this site

CAS 20325-40-0 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 0 EU annex records share this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 20325-40-0 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.