Substance Information

NB: Registration status and tonnage

  • The REACH Registered substance portal was updated on 9th November 2020; the REACH registered factsheets were further updated on 21st December 2020. Details of the improvements can be found at Dissemination Platform Updates. Reprocessing the entire dataset is ongoing since 21 December 2020. ECHA is making all possible efforts to synchronise the registration status and tonnage with the shortest delay.
  • While reprocessing is ongoing please note that substances whose registration dossiers are not yet processed can incorrectly state in the Infocard that they are not registered under REACH. In these cases if there is a link to a REACH registered substance factsheet then the substance IS registered. The correct total tonnage band can be found in the factsheet(s) for the substance.

Substance Infocard


2,4,5-T and its salts and esters

EC / List no.: -

CAS no.: -

Mol. Formula:

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Key datasets

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Regulatory context

Here you can find all of the regulations and regulatory lists in which this substance appears, according to the data available to ECHA. This substance has been found in the following regulatory activities (directly, or inheriting the regulatory context of a parent substance):

PIC - Prior Informed Consent Regulation
  • Substances subject to export controls or banned from export from the EU under the PIC regulation.
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Substance names and other identifiers

Regulatory process names
2,4,5-T and its salts and esters
Other identifiers
2918 91 00
Combined Nomenclature Code
2918 91 00
Combined Nomenclature Number
Harmonised System Code
Harmonised System Code (Mixture)
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Group members

This entry / group of substance has the following member substances:

Name EC / List no. CAS no. Association
2-methylbutyl (2,4,5-trichlorophenoxy)acetate 307-404-9 97635-44-4 Expert judgement (ECHA)
4-hydroxybutyl (2,4,5-trichlorophenoxy)acetate 254-982-2 40583-17-3 Expert judgement (ECHA)
3,5,5-trimethylhexyl 2,4,5-trichlorophenoxyacetate 277-935-8 74592-66-8 Expert judgement (ECHA)
(2-hydroxyethyl)diethylammonium (2,4,5-trichlorophenoxy)acetate 258-538-9 53404-86-7 Expert judgement (ECHA)
2,4,5-T 202-273-3 93-76-5 Expert judgement (ECHA)
Isopropyl 2,4,5-trichlorophenoxyacetate 202-275-4 93-78-7 Expert judgement (ECHA)
Butyl 2,4,5-trichlorophenoxyacetate 202-277-5 93-79-8 Expert judgement (ECHA)
Pentyl (2,4,5-trichlorophenoxy)acetate 204-392-6 120-39-8 Expert judgement (ECHA)
Methyl 2,4,5-trichlorophenoxyacetate 217-669-1 1928-37-6 Expert judgement (ECHA)
Ethyl 2,4,5-trichlorophenoxyacetate 217-671-2 1928-39-8 Expert judgement (ECHA)
Propyl 2,4,5-trichlorophenoxyacetate 217-672-8 1928-40-1 Expert judgement (ECHA)
2-ethylhexyl 2,4,5-trichlorophenoxyacetate 217-675-4 1928-47-8 Expert judgement (ECHA)
Triethylammonium (2,4,5-trichlorophenoxy)acetate 217-917-9 2008-46-0 Expert judgement (ECHA)
N,N-dimethyltridecylammonium (2,4,5-trichlorophenoxy)acetate 219-566-7 2464-48-4 Expert judgement (ECHA)
2-butoxyethyl 2,4,5-trichlorophenoxyacetate 219-828-0 2545-59-7 Expert judgement (ECHA)
Hexyl (2,4,5-trichlorophenoxy)acetate 220-108-3 2630-13-9 Expert judgement (ECHA)
Octyl (2,4,5-trichlorophenoxy)acetate 220-109-9 2630-15-1 Expert judgement (ECHA)
Nonyl (2,4,5-trichlorophenoxy)acetate 220-110-4 2630-16-2 Expert judgement (ECHA)
Tri(2-hydroxyethyl)ammonium (2,4,5-trichlorophenoxy)acetate 223-300-5 3813-14-7 Expert judgement (ECHA)
Isobutyl 2,4,5-trichlorophenoxyacetate 225-580-4 4938-72-1 Expert judgement (ECHA)
Dimethylammonium 2,4,5-trichlorophenoxyacetate 228-874-0 6369-97-7 Expert judgement (ECHA)
Bis(2-hydroxyethyl)ammonium 2,4,5-trichlorophenoxyacetate 229-138-1 6417-43-2 Expert judgement (ECHA)
3-methylbutyl (2,4,5-trichlorophenoxy)acetate 245-483-0 23197-61-7 Expert judgement (ECHA)
Diethylammonium (2,4,5-trichlorophenoxy)acetate 245-897-1 23819-11-6 Expert judgement (ECHA)
Isooctyl (2,4,5-trichlorophenoxy)acetate 246-700-1 25168-15-4 Expert judgement (ECHA)
Sodium 2,4,5-trichlorophenoxyacetate 236-949-4 13560-99-1 Expert judgement (ECHA)
Potassium 2,4,5-trichlorophenoxyacetate 253-667-7 37785-57-2 Expert judgement (ECHA)
2-ethyl-4-methylpentyl (2,4,5-trichlorophenoxy)acetate 274-012-1 69462-12-0 Expert judgement (ECHA)

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