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The packing groups for hazardous materials, abbreviated as PG, are divided into Category I and Category III. On the hazard packaging certificate, the UN identification number is located on the right side, while the name of the packaging container is indicated on the left side. A double-walled cardboard box corresponds to PG 4G; a closed steel drum corresponds to 1A1; and a closed plastic drum corresponds to 1H1. Regarding the flash point of hazardous materials, remember one key figure: 23°C. The flash point for Category III packaging must be higher than 23°C. This information is listed in item 9 of the MSDS. The hazard packaging certificate is issued by the quality inspection agency at the factory; it is the most common document required for hazard declaration, and the application fee is low. Quantitative restrictions: There are requirements regarding UN numbers and packing groups; for example, for UN1170, PG I requires a minimum packaging volume of 1L, while for UN1170, PG III, the minimum packaging volume is 5L. A classification certificate is often required for goods packaged in IBC containers. A steel cylinder certificate, also known as a pressure vessel certificate, is commonly used for Category 2 hazardous materials. PSN refers to the correct United Nations name for the substance being transported. Technical Name refers to the technical designation, usually the name of the product as listed in the shipping document or the main component name as stated in the MSDS (item 2). IMDG stands for the International Maritime Dangerous Goods Code. IMO is the International Maritime Organization. DGF is the application form for hazardous materials. UN3480 refers to lithium-ion battery packs (including polymer lithium-ion batteries). UN3481 refers to lithium-ion battery packs installed in equipment or packaged together with that equipment (including polymer lithium-ion battery packs). UN3171 refers to battery-powered vehicles or devices. A classification report can indicate whether a substance is considered a regular commodity or a hazardous material, but shipping companies do not recognize such reports. The classification and identification report serves two main purposes: one is that it is required by manufacturers when applying for a hazardous materials permit (the UN and CLASS codes on such permits are determined based on this report); the other purpose is to determine whether a substance is listed as a hazardous chemical in the \"Catalogue of Hazardous Chemicals\" (2015 edition). The institutions that prepare classification identification reports are mainly the laboratories under the customs authorities; for example, IMI at Shanghai Customs, DPTC at Changzhou Customs, Ningbo Customs, and others can all carry out this task. The validity period of the taxonomic identification report is 12 months. Manager Wang from Shanghai Lisheng & Danjishi International Logistics!