A more recent version of this regulatory record is available. This version is kept only as a historical record. Please see the Record history section for link to the most recent version.

A mixture of isomers of: 1,1'-[(3,5(or 2,4 or 4,6 or 2,6)-dihydroxy-o(or m or p)-phenylene)bis(azo-meta-phenyleneazo{1-[3-(dimethylamino)propyl]-1,2-dihydro-6-hydroxy-4-methyl-2-oxopyridine-5,3-diyl})]dipyridinium-dichloride-dihydrochloride; 1-(1-[3-(dimethylamino)propyl]-5-{3-[x-(4-{1-[3-(dimethylamino)propyl]-1,6-dihydro-2-hydroxy-4-methyl-6-oxo-5-pyridinio-3-pyridylazo}phenylazo)-2,4(or 2,6 or 3,5 or 4,6)-dihydroxyphenylazo]phenylazo}-1,2-dihydro-6-hydroxy-4-methyl-2-oxo-3-pyridyl)pyridinium-dichloride-dihydrochloride (where x is variable)


List details

Registration details

REACH registration record Registered substances
Factsheet URL external link [echa.europa.eu]
Tonnage band 100 - 1000 tonnes per annum
Submission type Joint
Registration type Full

Lead registrant

Available in REACH-IT (you can access this info in REACH-IT if you have registered, pre-registered or inquired for this substance.)


Registrant Address
ARCHROMA IBÉRICA, S.L. ZAL-Prat c/Cal Coracero, 46-56 08820 El Prat de Llobregat Spain
Archroma UK, Ltd Bowling Old Lane BD5 7JL Bradford United Kingdom

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  • Harmonised classification and labelling (CLP Annex VI) under the name reaction mass of 1,1'-((dihydroxyphenylene)bis(azo-3,1-phenylenazo(1-(3-dimethylaminopropyl)-1,2-dihydro-6-hydroxy-4-methyl-2-oxopyridine-5,3-diyl)))dipyridinium dichloride dihydrochloride, mixed isomers and 1-(1-(3-dimethylaminopropyl)-5-(3-((4-(1-(3-dimethylaminopropyl)-1,6-dihydro-2-hydroxy-4-methyl-6-oxo-5-pyridinio-3-pyridylazo)phenylazo)-2,4(or2,6 or3,5)-dihydroxyphenylazo)phenylazo)-1,2-dihydro-6-hydroxy-4-methyl-2-oxo-3-pyridyl)pyridinium dichloride
    Hazard Class and Category Codes: Skin Sens. 1:

Record history

The following timeline shows when we detected changes of this regulatory record (the date might slightly differ from the date of the actual change). Additions between versions are hightlighted in green color, red color shows data removed between versions.

Oct. 2, 2019
  • Related internal registration record ID: 8440293191
  • Tonnage band: 100 - 1000 tonnes per annum100+ tonnes per annum
This version
July 11, 2019
  • CAS: 159405-95-5
  • Related internal registration record ID: 5657984402
Dec. 5, 2018
  • Related internal registration record ID: 3099156579
  • Tonnage band: 100+ tonnes per annum100 - 1000 tonnes per annum
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