Chapter --Reaction initiators, reaction accelerators and catalytic preparations, not elsewhere specified or included (3815)
Result ------- Catalyst in the form of grains of which 90?% or more by weight have a particle-size not exceeding 10?micrometres, consisting of a mixture of oxides on a magnesium-silicate support, containing by weight: - 20?% or more but not more than 35?% of copper (38151910)