Chemical name: TBT

Final regulatory action has been taken for the category: Industrial

Final regulatory action: The chemical is Severely Restricted

Use or uses prohibited by the final regulatory action:

Trialkyltin hydroxide and its salts (including trialkyltin oxide) as well as tributyltin compounds and mixtures which contain 0.1% or more of any of these chemicals are banned for manufacture, import and use as:

A.Antifouling agent in ROK vessels (except for warships and police boats under Article 2 of the Shipping Law and in fishing boats under Article 2 of the Fisheries Law

B.Antifouling agents in fishing gears, nets, and structures or facilities that may potentially come into contact with, or have already come into contact with sea water, either in part or in full, under the Marine Facilities and Harbors Act of the Marine Pollution Prevention Law.

C.Wood preservatives under the Forestry Law

D.Bactericides in cooling water.

Use or uses that remain allowed:

Use of the chemical for research or laboratory purposes.

The final regulatory action was based on a risk or hazard evaluation: Yes

Summary of the final regulatory action:

Trialkyltin hydroxide and its salts (including trialkyltin oxide) as well as tributyltin compounds and mixtures which contain 0.1% or more of any of these chemicals are banned for manufacture, import and use as:

A.Antifouling agent in ROK vessels (except for warships and police boats under Article 2 of the Shipping Law and in fishing boats under Article 2 of the Fisheries Law

B.Antifouling agents in fishing gears, nets, and structures or facilities that may potentially come into contact with, or have already come into contact with sea water, either in part or in full, under the Marine Facilities and Harbors Act of the Marine Pollution Prevention Law.

C.Wood preservatives under the Forestry Law

D.Bactericides in cooling water.

The reasons for the final regulatory action were relevant to: Environment

Summary of known hazards and risks to the environment:

Trialkyltin hydroxide has risk of acute and reproductive toxic effect on aquatic organisms, and it can strongly bioaccumulate in various aquatic organisms.

Expected effect of the final regulatory action in relation to the environment:

It is expected that the regulatory action will significantly reduce the potential risk of those reproductive and bioaccumulative effect to aquatic organisms

Date of entry into force of the final regulatory action: 16/09/2003

Tributyl tin oxide and its mixtures were banned for manufacture, use and import by MOE's Public Notice No 1991-44(9 August 1991). The Notice was amended several times and final amended notice took into force 16 September 2003.