ZNO Grade 500H is manufactured by French (Indirect) Process with slightly higher surface area, high assay and low impurities. ZNO Grade 500H meets the requirements of ASTM specification D79 for paint, EC RoHS for heavy metal limits, and End of Live Vehicles (ELV Directive), and other regulations where good quality zinc oxide is required. This grade is used where lower impurities are required and increased zinc oxide reactivity provides benefits in the application, such as certain zinc chemicals may require less reactor time, or the end product may have improved clarity or color.
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