Numerical Systems and Corresponding Labels/Placards
In the International Maritime Dangerous Goods (IMDG) Code, hazard classes are identified using a numerical system and corresponding labels or placards. The numerical system consists of a two-digit code, while labels and placards are color-coded to provide visual identification. Here’s how hazard classes are identified in the IMDG Code:
1. Numerical System:
Each hazard class is assigned a unique two-digit numerical code. This code is used to categorize and classify dangerous goods based on their primary hazards. The numerical system is as follows:
Class 1: Explosives
Class 2: Gases
Class 3: Flammable Liquids
Class 4: Flammable Solids; Substances Liable to Spontaneous Combustion; Substances that, in Contact with Water, Emit Flammable Gases
Class 5: Oxidizing Substances and Organic Peroxides
Class 6: Toxic and Infectious Substances
Class 7: Radioactive Material
Class 8: Corrosive Substances
Class 9: Miscellaneous Dangerous Substances and Articles
2. Labels and Placards:
Hazard classes are further visually identified by labels and placards affixed to containers, packages, and transport units. These labels and placards use color-coding and symbols to represent the hazard class. The specific labels and placards for each hazard class are as follows:
Class 1 (Explosives): Orange labels with a black explosion symbol.
Class 2 (Gases): Green labels with a black gas cylinder symbol.
Class 3 (Flammable Liquids): Red labels with a black flame symbol. Class 4 (Flammable Solids, etc.): Red labels with various symbols, depending on the specific division within Class 4.
Class 5 (Oxidizing Substances, etc.): Yellow labels with various symbols, depending on the specific division within Class 5.
Class 6 (Toxic and Infectious Substances): White labels with various symbols, depending on the specific division within Class 6.
Class 7 (Radioactive Material): Yellow labels with the radiation symbol and the radioactive material symbol.
Class 8 (Corrosive Substances): Black labels with a white corrosion symbol. Class 9 (Miscellaneous Dangerous Substances): Various labels with specific symbols, as applicable.
It’s important for those involved in the transport of dangerous goods by sea to be familiar with the hazard classes, their numerical codes, and the corresponding labels and placards. Proper identification and labeling are crucial for ensuring the safe handling, stowage, and transportation of hazardous materials, as well as for emergency response in case of incidents.
Additionally,
In the context of the International Maritime Dangerous Goods (IMDG) Code, a “PSN” or “Proper Shipping Name” is a specific term used to describe the name of a substance or article that is considered hazardous and subject to regulations when transported by sea. The Proper Shipping Name is a standardized and internationally recognized name that helps identify the substance or article being shipped. It plays a crucial role in the classification, labeling, documentation, and safe transportation of dangerous goods by sea.
Key points about the Proper Shipping Name (PSN) in the IMDG Code include:
1. Unambiguous Identification:
The PSN is designed to provide an unambiguous and standardized identification of the hazardous material being transported. It ensures that all parties involved in the shipment, from shippers to emergency responders, understand the nature of the material.
2. Specific Naming Convention:
The PSN is formatted in a specific way to ensure consistency. It typically consists of the primary name of the substance followed by additional descriptive information as needed. For example, a PSN might include the chemical name of the substance, its common name, and any specific details required for proper identification.
3. Use in Documentation:
The PSN is a critical component of the dangerous goods declaration and shipping documentation. Shippers are required to accurately list the PSN for each hazardous material included in a shipment. This information helps authorities and carriers determine the appropriate handling and storage procedures.
4. Classification Basis:
The classification of a hazardous material into a particular hazard class and division is closely linked to its Proper Shipping Name. The PSN is one of the factors used to determine how a substance is classified within the IMDG Code.
5. Reference in Labels and Markings:
The PSN is often referenced in labels and markings on containers and packages containing dangerous goods. It helps ensure that the labels and placards accurately reflect the contents of the shipment.
6. Cross-Reference:
The IMDG Code provides a list of Proper Shipping Names along with their associated hazard classes, divisions, and packing group assignments. This list serves as a valuable reference for shippers and regulatory authorities.
Proper Shipping Names are a fundamental element of the IMDG Code’s system for the safe and standardized transport of dangerous goods by sea. Accurate and consistent use of PSNs is essential to ensure the safety of maritime transportation and compliance with international regulations.
