Potassium permanganate (KMnO₄) is a powerful ethylene (C₂H₄)-scavenging agent widely used in fresh horticultural commodities to delay the postharvest maturation. According to databases, it has been used for almost 50 years in food-packaging systems, and over 70 studies have evaluated its effects on fresh produce quality, mainly on climacteric fruit. However, the use of KMnO₄-based technology remains limited at a commercial scale, since there are still lots of doubts on its potential as an effective postharvest tool, as well as in relation with health, environmental and safety concerns. Depending on the commodity, and even the variety, these scavengers may have different effects, but overall, they can delay ripening/senescence-related processes such as chlorophyll degradation/colour changes, weight and firmness losses, disorders and diseases, acidity and sugar changes. This review comprises an updated overview of the current knowledge regarding the use of KMnO₄ as C₂H₄-scavenging agent, providing a concise appraisal on KMnO₄-based C₂H₄ removal application and its effect on the quality of fresh produce. KMnO₄ is commonly supported onto microporous mineral particles, which are placed into small sachets to avoid direct food contact within packages. Generally, KMnO₄-based C₂H₄ scavengers are jointly used with modified atmosphere packaging. Hence, KMnO₄-based C₂H₄-scavenging systems, as an active food-packaging technology, seem to be a relevant option to preserve the quality and safety of fresh horticultural produce. Nevertheless, although there are many KMnO₄-based products available in the market, which are presently reviewed, more research is required in order to obtain an optimal C₂H₄-scavenger performance.

高锰酸钾（KMnO ₄）是一种强力的除乙烯剂（C ₂ H ₄），广泛用于新鲜的园艺商品中以延迟收获后的成熟。根据数据库，它已经在食品包装系统中使用了近50年，已有70多项研究评估了其对新鲜农产品质量（主要是对更年期水果）的影响。但是，使用KMnO ₄基于技术的技术在商业规模上仍然受到限制，因为对于它作为一种有效的收获后工具的潜力以及与健康，环境和安全相关的问题，仍然存在许多疑问。取决于商品，甚至是品种，这些清除剂可能会产生不同的影响，但总的来说，它们可能会延迟与成熟/衰老相关的过程，例如叶绿素降解/颜色变化，重量和硬度损失，疾病和疾病，酸度和糖分变化。这篇评论包括有关使用KMnO ₄作为C ₂ H ₄清除剂的最新知识的最新概述，对基于KMnO ₄的C ₂ H _4进行了简要评估去除应用及其对新鲜农产品质量的影响。通常将KMnO ₄负载在微孔矿物颗粒上，然后将其放入小袋中，以避免食品直接与包装接触。通常，基于KMnO ₄的C ₂ H ₄清除剂与气调包装一起使用。因此，作为一种有效的食品包装技术，基于KMnO ₄的C ₂ H ₄清除系统似乎是保持新鲜园艺产品的质量和安全性的相关选择。然而，尽管有很多KMnO ₄市场上可买到的基于氢的产品，目前正在审查中，为了获得最佳的C ₂ H ₄清除剂性能，还需要进行更多的研究。