Sodium Hydroxide REACH consortium

The major European manufacturers of sodium hydroxide (caustic soda) have joined efforts for their REACH compliance activities and have launched the sodium hydroxide REACH consortium end of February 2009, following one year of preparatory work.

The members of the Sodium Hydroxide consortium have agreed to cooperate, under the leadership of Solvay-Electrolyse-France SAS, in the preparation of a joint registration dossier for sodium hydroxide. The dossier includes information on harmonised classification and labelling of the substance. However, the substance is already listed in Annex VI of the Regulation on classification, labelling and packaging of substances and mixtures (Regulation 1272/2008).

Substance covered

Substance name EC Number CAS Number

Sodium hydroxide 



EU Risk Assessment
A lot of pre-work has already been done, based on the EU risk assessment which was finalised and agreed under the existing substances regulation (Council Regulation 793/93). A comprehensive risk assessment report has been published in 2007 and is available on the ECB website. The report has been used as basis for the joint REACH registration dossier of sodium hydroxide.
Uses and exposure scenarios
Based on the available information, the members of the REACH consortium have made an inventory of the uses of sodium hydroxide. Furthermore, exposure scenarios and risk management measures have been proposed.

Sodium Hydroxide SIEF documents are available for download below:

- Substance Identity Profile,

- Recommendations on Analytical Methods,

- Uses covered.


The sodium hydroxide (caustic soda) REACH consortium structure includes a Steering Committee and a Technical Committee. ReachCentrum acts as secretariat for the consortium. The consortium is open to manufacturers, importers and only representatives as defined in the regulation. 

Current members of the Sodium Hydroxide consortium are: 

  • Anwil SA
  • Arkema France
  • Arkema QVC
  • Bayer MaterialScience AG
  • Bochemie a.s.
  • Borregaard Industries Ltd
  • BorsodChem Zrt
  • CABB GmbH
  • Chimcomplex SA
  • CUF - Quimicos Industriais SA
  • DniproAzot Trade Sro
  • Donau Chemie AG
  • Dow Deutschland Anlagengesellschaft mbH
  • Electroquimica de Hernani SA
  • Electroquimica del Noroeste SA
  • Ercros Industrial SA
  • Evonik Degussa GmbH
  • Finnish Chemicals Oy
  • Fortischem as
  • Hellenic Petroleum
  • HydroChem Italia srl
  • ICL-IP Europe BV
  • INEOS ChlorVinyls Limited
  • Inovyn France
  • Kaustik Europe - AOA
  • Kaustik Europe - JSC
  • Kemira Oyj
  • KIST Europe
  • LUKOIL Neftochim Bourgas JSC
  • MC Uralchem lts
  • Micro-Bio (Ireland) Ltd
  • Nouryon INdustrial Chemicals BV
  • Oltchim SA
  • PCC Rokita SA
  • Perstorp France SAS
  • Petkim Petrokimya Holding AS
  • Produits Chimique d'Harbonnières
  • Quimica del Cinca SA
  • Reach Global Services Europe
  • SC Chimcomplex SA Borzesti
  • Spolana AS
  • Spolek pro chemickou a hutni vyrobu, a.s. (Spolchemie)
  • Syndial SpA
  • Tessenderlo Chemie NV
  • Vinnolit GmbH & Co. KG
  • Wacker Chemie Ag

Relevant links

Letter of Access

Letter of Access now available for purchase through the ReachCentrum LoA Shop.


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