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Major Considerations for Transporting Dangerous Goods

Transporting dangerous goods is often challenging. Personal injury and property damage may occur if the transportation and storage process are not handled properly. But with the right infrastructure and technology, it can eliminate risk and provide a competitive advantage to the business. Transporting dangerous goods has multiple sets of the process that define safety standards and shipping requirements for up to a thousand types of dangerous goods. The Regulations also provide a means of communicating the nature and extent of the hazards and risks associated with these dangerous goods. Whether it is air, sea, or land transportation, it is very important to understand the classification, packaging requirements, labels, etc. of various dangerous goods.

Handling of dangerous goods
Image taken from https://dhdlogistics.com/en/transportation-and-handling-of-dangerous-goods/

Classifying Dangerous Goods

Dangerous goods are classified into nine hazardous categories, containing primary classes and additional sub-classes that describe different types of risk. The definition of hazardous substances (including articles) is broad. However, some pharmaceutical and cosmetic products do not possess the hazardous properties that would bring into the scope of the requirements. Those products are usually packed in small containers that allow at least partial exemptions from the requirements (limited quantities or limited load—refer to main exemption). When transporting materials, the sender must determine whether the material should be classified as dangerous goods. As such, it is very important to understand the classification of dangerous goods.

Handling of dangerous goods
Image taken from https://www.icecargo.com.au/dangerous-goods-shipping/

Assigning Packing Group

Safety depends on transporting dangerous goods in proper packaging. Choosing the wrong package can cause serious injuries to transport workers, bring harm to the environment, or other catastrophic damage. Appropriate hazmat packaging is based on the product’s most appropriate hazard classification and its physical attributes. For example, it is not allowed to ship corrosive materials in metal packaging because corrosive substances will react violently with the metal and destroy the packaging eventually. Packaging requirements depend on the type, category, and quantity of dangerous goods to be shipped. Typically, packaging must be tested and certified to meet the requirements of dangerous goods transport regulations. Proper packaging also depends on the packaging group of the material.

  1. Packing group I: substances presenting a high danger and requiring high packaging strength. For example, low flash point class III flammable liquids, class IV class I flammable solids, class V class I oxidants, etc., require class I packaging.
  2. Packing group II: substances posing a medium risk, and high packaging strength is required. For example, such as Class I explosives, Class II toxic gases, Class IV Class I flammable solids, etc., require Class II packaging.
  3. Packing group III: substances posing a low risk, with general packaging strength requirements. For example, there are five types of secondary oxidants, four types of secondary flammable solids, and so on.
Assigning Packing Group
Image taken from https://chemical.chemlinked.com/chempedia/transportation-dangerous-goods-china

Labelling Dangerous Goods

These labels are used to identify the hazard class or classification of dangerous goods and used to designate the hazard class or classification of dangerous goods when carried. Some hazardous materials may have more than one hazardous property. Each hazard must be identified and labelled on the packaging for transport. The potential hazard, specific nature of goods requiring segregation, and stowage conditions, etc. are communicated through marks, labels, placards, and documents. For certain dangerous goods, ICAO technical directives also require the handling of labels and/or other tags to be posted. Hazard labels and other markings must be clearly visible and must not be covered by any tape, text, file bags, or other stickers.

The different types of hazard labels, markings, and handling labels are shown below:

Labelling Dangerous Goods
Image taken from SIPMM: https://publication.sipmm.edu.sg/critical-factors-transporting-storing-dangerous-goods/

In addition to referring to these markings and labels, shippers and forwarders should check the information on the relevant safety data sheets to confirm the classification and handling of such dangerous goods when shipped.

Receiving and Storing Dangerous Goods

The warehouse should have a special receiving and storage area for dangerous goods. Training of the way to handle these materials should also be provided to the employees. Each duty officer has appropriate personal protective equipment (PPE). The warehouses may also need to segregate hazardous materials based on their classification and packaging groups. Controlling potential ignition sources around flammable materials and processing appropriate safety signs and placards is also crucial. These practices help to reduce the risk of hazards caused by accidental leakage or damage. For example, corrosive liquids can be stored near to flammable gases but not explosives. Learning the rules of storing hazmat materials are crucial in safety and legal aspects. Quarantine sheets should be posted in warehouses with hazardous materials and understood by workers.


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Jo Lau Chia Ling, Diploma in Logistics and Supply Management
Jo Lau Chia Ling, Diploma in Logistics and Supply Management
Jo Lau Chia Ling has extensive years of work experience in the specialised field of warehousing and logistics, specifically in the distribution of spare parts components. Jo is a member of the Singapore Institute of Purchasing and Materials Management (SIPMM). She completed the Diploma in Logistics and Supply Management (DLSM) in September 2022 at SIPMM Institute.
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