氧化鎢添加劑的平均氧化水平為2.86，對應的氧含量為19.93%。

 

    歐盟食品安全局分別開展了遷移測試以及遺傳毒性評估。歐盟食品安全局認為，按照最大使用量75 mg/kg，將氧化鎢作為再熱劑用于PET不存在安全問題。然而用作其他功能或用于其他聚合物時，遷移量不應超過50 μg/kg（以鎢計）。

 

    部分原文報道如下：

 

    This scientific opinion of EFSA Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids （CEF Panel） deals with the risk assessment of the additive tungsten oxide, CAS No 39318-18-8 and FCM No 1064, for use in food contact materials as a reheat agent in polyethylene terephthalate （PET） at a maximum use level of 75 ppm （75 mg/kg PET）。 The substance is a mixture of tungsten oxides with tungsten at different oxidative levels. The average oxidation level of tungsten in the oxides is 2.86 corresponding to 19.93% oxygen content. Detailed information on impurities is provided as confidential. Specific migration from PET plaques with the substance at 150 mg/kg （double the maximum intended use level of 75 mg/kg） was determined into 95% ethanol, as a worst-case simulant for PET due to its swelling effect. Under these test conditions, the specific migration, measured as tungsten using ICP-MS, was at the level of 1 μg/kg.

 

    原文鏈接：http://www.efsa.europa.eu/en/efsajournal/pub/4661