SMP

Synthetic Microplastic Polymers.

Polymers that are solid and which fulfil both of the following conditions:
(a) are contained in particles and constitute at least 1 % by weight of those particles; or build a continuous surface coating on particles;
(b) at least 1 % by weight of the particles referred to in point (a) fulfil either of the following conditions:
  (i) all dimensions of the particles are equal to or less than 5 mm;
  (ii) the length of the particles is equal to or less than 15 mm and their length to diameter ratio is greater than 3.

Following synthetic polymer microparticles, as substances on their own or in mixtures are exempted from the definition:
(a) synthetic polymer microparticles which are contained by technical means so that releases to the environment are prevented when used in accordance with the instructions for use during the intended end use;
(b) synthetic polymer microparticles the physical properties of which are permanently modified during intended end use in such a way that the polymer no longer falls within the scope of this entry;
(c) synthetic polymer microparticles which are permanently incorporated into a solid matrix during intended end use.

Source: REACH restriction of synthetic polymer microparticles