Proper classification may be obtained through a variety of sources. These include, but are not limited to, the manufacturer of the material, laboratory testing, and Safety Data Sheets. SDS of products includes a transportation hazard classification for the product. This classification provides a four-digit ID number, a proper shipping name, the hazard class, and the packing group for the product. Use this information to identify the correct entry on the Hazardous Materials Table. The Hazardous Materials Table contains label codes and basic descriptions for the hazmat, references to the appropriate packaging sections, certain quantity limitations, and any special provisions or exceptions.