Dechlorane Plus (DP) is an unregulated, highly chlorinated flame retardant. It has been manufactured from past 40 years but its presence in the environment was initially reported in 2006. Later, it has been found in various biotic and abiotic environmental matrices. However, little attention has been paid to monitor its presence in Asia. Many studies have reported the occurrence of DP in the environment of Asia, yet the data are scarce, and studies are limited to few regions. The objective of present review is to summarize the occurrence, distribution, and toxicity of this ubiquitous pollutant in various environmental matrices (biotic and abiotic). DP has also been reported in the areas with no emission sources, which proves its long-range transport. Moreover, urbanization and industrialization also affect the distribution of DP, i.e., high levels of DP have been found in urban areas relative to the rural. Tidal movement also incorporates in transport of DP across the aquatic system. Further, bioaccumulation trend of DP in various tissues is kidney > liver > muscle tissues, whereas, blood brain barrier resists its accumulation in brain tissues. Additionally, gender-based accumulation trends revealed high DP levels in females in comparison to males due to strong metabolism of males. Furthermore, methodological aspects and instrumental analysis used in previous studies have also been summarized here. However, data on biomagnification in aquatic ecosystem and bioaccumulation of DP in terrestrial food web are still scarce. Toxicity behavior of syn-DP and anti-DP is still unknown which might gain the interest for future studies.

中文翻译：

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Dechlorane Plus作为亚洲新兴的环境污染物：综述。

Dechlorane Plus（DP）是一种不受管制的高度氯化的阻燃剂。它的生产已有40多年的历史，但在2006年首次报道了其在环境中的存在。后来，在各种生物和非生物环境基质中发现了它。但是，很少有人关注其在亚洲的存在。许多研究报告了在亚洲环境中发生DP的情况，但数据很少，而且研究仅限于少数地区。本文的目的是总结这种普遍存在的污染物在各种环境基质（生物和非生物）中的发生，分布和毒性。在没有排放源的地区也有DP的报道，这证明了DP的远距离运输。此外，城市化和工业化也影响了DP的分布，即 在城市地区相对于农村地区发现了高水平的DP。潮汐运动还包括跨水生系统的DP的运输。此外，DP在各种组织中的生物蓄积趋势是肾脏>肝脏>肌肉组织，而血脑屏障阻止其在脑组织中的蓄积。另外，基于性别的积累趋势表明，由于男性的强新陈代谢，女性相比男性具有较高的DP水平。此外，先前研究中使用的方法学方面和仪器分析也已在此进行了总结。但是，关于水生生态系统中生物放大作用和陆生食物网中DP的生物积累的数据仍然很少。syn-DP和抗DP的毒性行为仍是未知的，这可能会引起未来研究的兴趣。