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Electrically conductive products from GRAFE – Now with lower PAH

For the protection of consumers, it is required that electrically conductive products meet high legal standards. Wherever they may come in contact with skin, even for short periods, it must be ensured that PAH concentrations in materials do not exceed maximum levels. The GRAFE Group has successfully developed reduced-PAH conductive compounds to meet the standards required by the GS seal for tested quality in the Categories 1 – 2.


Polycyclic aromatic hydrocarbons (PAH) are a group of organic compounds classified as toxic to the environment and harmful to human health. These substances result mainly from incomplete combustion of organic matter, which is why PAHs accumulate in industrial carbon black pigments used to modify the conductivity of polymers. In order to evaluate the potential hazard of PAHs in plastics-based electrically conductive consumer products, the GS seal for tested quality applies standardized testing procedures. The GS seal sets the maximum PAH level in relation to mass depending on a given product’s application. PAHs are absorbed by humans in particular through skin contact, food and when breathing affected air. For example, to be listed in Category 2 of the GS label, the total amount of PAH in a substance must be lower than 10 mg/kg and the maximum of levels of benzopyrene, which are particularly critical, must not exceed 1mg/kg.


In this connection, the GRAFE Polymer Technik GmbH has developed a new range of products in the area of carbon black modified, electrically conductive polymer carbons. All products in this series comply with the PAH levels in accordance with the GS seal for tested quality / Categories 1-2.


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