When selling engineering materials on Alibaba.com, RoHS (Restriction of Hazardous Substances) compliance has become a non-negotiable requirement for B2B buyers worldwide. This directive, originally focused on electrical and electronic equipment, now influences procurement decisions across multiple industries including automotive, industrial machinery, and consumer goods.
The 10 Restricted Substances You Must Know
RoHS compliance in 2026 covers ten specific hazardous substances that must remain below defined thresholds in your products. Understanding these substances is fundamental whether you're offering aluminum components, modified plastics like POM (Polyoxymethylene), or any engineered material:
RoHS Restricted Substances and Maximum Concentration Values
| Substance | Chemical Formula | Maximum Concentration | Common Sources in Engineering Materials |
|---|---|---|---|
| Lead (Pb) | Pb | 0.1% (1000 ppm) | Stabilizers, solder, metal alloys |
| Mercury (Hg) | Hg | 0.1% (1000 ppm) | Switches, relays, fluorescent components |
| Cadmium (Cd) | Cd | 0.01% (100 ppm) | Pigments, plating, stabilizers |
| Hexavalent Chromium (Cr VI) | Cr⁶⁺ | 0.1% (1000 ppm) | Corrosion protection, metal plating |
| Polybrominated Biphenyls (PBB) | C₁₂H₁₀-xBrx | 0.1% (1000 ppm) | Flame retardants in plastics |
| Polybrominated Diphenyl Ethers (PBDE) | C₁₂H₁₀-xBrxO | 0.1% (1000 ppm) | Flame retardants in plastics |
| Bis(2-ethylhexyl) phthalate (DEHP) | C₂₄H₃₈O₄ | 0.1% (1000 ppm) | Plasticizers in PVC and cables |
| Butyl benzyl phthalate (BBP) | C₁₉H₂₀O₄ | 0.1% (1000 ppm) | Plasticizers, vinyl flooring |
| Dibutyl phthalate (DBP) | C₁₆H₂₂O₄ | 0.1% (1000 ppm) | Plasticizers, adhesives |
| Diisobutyl phthalate (DIBP) | C₁₆H₂₂O₄ | 0.1% (1000 ppm) | Plasticizers, coatings |
2026 Regulatory Updates That Impact Your Business
The compliance landscape is evolving rapidly. Several critical changes in 2026-2027 directly affect how Southeast Asian merchants should approach certification when selling on Alibaba.com:
Digital Documentation Trend: The EU Omnibus IV initiative promotes 'digital by default' compliance documentation, meaning buyers increasingly expect electronic certificates, searchable databases, and automated compliance verification rather than paper-based declarations [2].

