IATA第50期危险品规则(2009)显著修订和变化
UN3090－锂电池和UN3091-安装在设备上或与设备包装在一起的锂电池的运输专用名称，修订为锂金属电池，安装在设备上的锂金属电池和与设备包装在一起的锂金属电池。
锂离子电池增加了新条目。UN3480锂离子电池；UN3481安装在设备上的锂离子电池或与设备包装在一起的锂离子电池。
锂金属电池在客机上的数量限制减为每件毛重2.5kg。
Special Provision A69, which excepts from the Regulations articles containing a small quantity of mercury, gallium or inert gas has been
assigned to Argon, compressed, Helium, compressed, Neon, compressed, Nitrogen, compressed and Xenon, compressed;
将特殊规定A69（指含有少量汞、镓或惰性气体的物质不受《危规》限制）分配到下述条目：Argon, compressed；Helium, compressed; Neon, compressed; Nitrogen, compressed; Xenon, compressed。
UN1250, Methyltrichlorosilane and UN1305, Vinyltrichlorosilane have been revised from Packing Group I to Packing Group II;
UN1250-甲基三氯硅烷和UN1305-乙烯基三氯硅烷从包装等级I级改为包装等级II级。
The entries for UN2031, Nitric acid have been revised. The current entry “Nitric acid, other than red fuming, with 70% or less, but more than 20% nitric acid” has been revised and now becomes “Nitric acid, other than red fuming, with ≥65%, but ≤70% nitric acid” with a Division 5.1 subsidiary risk, still in Packing Group II. Then a new entry “Nitric acid, other than red Fuming, with >20%, but <65% nitric acid” has been added.
将UN2031-硝酸做了修订。现在的“硝酸,非发烟硝酸，含硝酸大于20%，但不大于70%”条目，修订为“硝酸，非发烟硝酸，含硝酸大于或等于65% ,但不大于70%”，具5.1项次要危险性，包装等级仍为II级。 新增条目“硝酸,非发烟硝酸，含硝酸大于20%，但小于65%”。
4.4–Special Provisions 特殊规定
Where the wording of a special provision is equivalent to that in the UN Model Regulations, the UN special provision number is shown in
parentheses following the special provision number.
因为特殊规定的内容与UN《规章范本》中特殊规定的内容相同，因此，特殊规定编号后在括号内增加对应的UN《规章范本》中特殊规定的编号。
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