These criteria for toxic substances are defined in Annex XIII of the REACH regulation.
Hazardous substances are defined by standardized classification and labeling according to the criteria of the CLP Regulation [1].
In this context, a range of substances were defined as bioaccumulative and are now listed as POP by the Stockholm Convention despite relatively low BCF values [19].
Natural substances were defined here as substances, which originate clearly from a specific organism (indicated by its scientific Latin binomials or known to be from a definite biological species) as described in [13].
Those precursor substances are defined by a similar length of the perfluorinated carbon chain compared to the short-chain PFASs, connected to a non-fluorinated moiety (see Fig. 1).
Perhaps it is a mistake to see the theory as belonging to physics at all; instead, bearing in mind the way the substances are defined in terms of their sensible qualities, we might see it as an exercise in the logical analysis of the data presented by the various sense modalities to construct a (metaphysical) theory of the world.
Because of their partially synthetic and partially natural composition, some sexual enhancer substances are defined "mixed".
All other ingredients, such as fragrances, dyes, aerosol propellants, solvents, desiccants, carriers, and other substances, are defined as inert.
In Argentina and Brazil, food contact substances are defined and regulated as food additives as per Mercosur standard GMC 32/07.
In China, food contact substances are defined as materials in contact with the food, which include the food containers, packaging materials and anything in contact with the food in the course of manufacture, transport, sale and service.
