The UK Health and Safety Executive (HSE) has published GB MCL Technical Reports for the following substances:

1. Benthiavalicarb-isopropyl

2. 2,3-epoxypropyl neodecanoate

3. Sulfur

4. Multi-Walled Carbon Tubes (synthetic graphite in tubular shape) with a geometric tube diameter range ≥ 30 nm to < 3 μm and a length ≥ 5 μm and aspect ratio > 3:1, including Multi-Walled Carbon Nanotubes, MWC(N)T