Meaning
Restriction of hazardous substances mandates strict upper concentration limits for ten specific chemical elements and compounds used in electronic and electrical equipment manufacturing. The rosh standard identifies lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, and polybrominated diphenyl ethers as primary targets for removal or strict containment. Compliance is measured by weight percentage at the homogeneous material level, forcing polymer suppliers to provide certificates confirming that resin additives and pigments fall below the ppm threshold.
Failure to verify these inputs leads to immediate rejection of finished components during regulatory audits.
Processing Impact
Heat stabilizers and flame retardants represent the primary additives that shift during high temperature injection moulding if they contain restricted substances. Standard resin datasheets reflect virgin material composition, but regrind operations introduce risks of contamination from legacy sources or non-compliant additives. Tooling maintenance crews verify that mold release agents do not transfer forbidden residues into the final part.
Moulders mitigate liability by maintaining a segregated supply chain for compliant materials, because even small quantities of prohibited filler drift will invalidate the certification of an entire production batch.
Verification Protocol
Chemical analysis relies on X-ray fluorescence spectroscopy as an initial screening method to detect elemental metallic content on part surfaces. Professional laboratories perform wet chemical testing using acid digestion to dissolve sample fragments followed by mass spectrometry for precise quantification of organic compounds. Document control departments aggregate technical files including material safety data sheets and third party test reports for each specific resin grade.
These records remain open for inspection by market surveillance authorities to prove the integrity of every product distributed in the trade area.
Compliance Scope
Statutory limits apply to the raw material inputs used for household appliances, telecommunications hardware, and consumer electronic goods across all member markets. Finished equipment undergoes rigorous sampling to ensure that the assembly process does not introduce cross contamination through metal contacts or solder masks. Manufacturers bear responsibility for the entire bill of materials, including hardware and casing components, regardless of the individual supplier location.
Rigorous inventory management remains the only method to prevent non-compliant parts from entering the commercial stream.
