Quantum Materials Corp. (fka QTMM)

[BigE1960]

Relative to the "applied at the homogeneous material level" thought, it may be that it applies to the QDV or 3M film mass, not that of the phone. For example, that list contains flame-retardant additives for plastics. When those were banned, the calculation wasn't for the total weight of the computer CRT displays that had a PC/ABS blend or polyphenylene oxide bezel or housing. It was as a percent in the homogeneous thermoplastic component.

I don't know the answer, just asking the question.
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P.S.- Oops, just looked it up and found this:

The maximum permitted concentrations in non-exempt products are 0.1% or 1000 ppm (except for cadmium, which is limited to 0.01% or 100 ppm) by weight. The restrictions are on each homogeneous material in the product, which means that the limits do not apply to the weight of the finished product, or even to a component, but to any single substance that could (theoretically) be separated mechanically—for example, the sheath on a cable or the tinning on a component lead.

As an example, a radio is composed of a case, screws, washers, a circuit board, speakers, etc. The screws, washers, and case may each be made of homogenous materials, but the other components comprise multiple sub-components of many different types of material. For instance, a circuit board is composed of a bare PCB, ICs, resistors, capacitors, switches, etc. A switch is composed of a case, a lever, a spring, contacts, pins, etc., each of which may be made of different materials. A contact might be composed of a copper strip with a surface coating. A speaker is composed of a permanent magnet, copper wire, paper, etc.