The Department for Environment, Food and Rural Affairs (Defra) has published decisions on 3 applications for authorisation. The applications are for the time-limited use of a substance of very high concern (SVHC) under UK REACH. Authorisation has been granted to: - Tyco Electronics UK Ltd
For the industrial use of chromium trioxide in conversion coating and passivation of circular and rectangular connectors in order to meet the requirements of international standards and special requirements of industries subject to harsh environments - Chemetall Limited
For mixing by aerospace companies and their associated supply chains, including the Authorisation Holder, of base polysulfide sealant components with 4-NPnEO containing hardener, resulting in mixtures containing < 0.1% w/w of 4-NPnEO for aerospace uses
Authorisation has been refused to:
- The Surface Engineering Association (on behalf of Cannock Chemicals Limited)
For the use of chromium trioxide for the formulation of surface treatment process solutions â specifically producing chromic acid from chromium trioxide by the addition of water
Further information Applications for authorisation received by HSE, and the opinions on these, are included in our database of applications granted and in progress. Decisions made by the Defra Secretary of State are published on GOV.UK. | 
