GHS hazard statements (H statements) provide standardized information on product hazards while precautionary statements (P statements) provide advice on how to correctly handle chemical substances and mixtures. Both are assigned a unique numerical code (H and P code).

The letter "H" stands for "hazard statement.” The number indicates the type of hazard as follows:

• "2" for physical hazards
• "3" for health hazards
• "4" for environmental hazards

The two-digit sequence that follows corresponds to the specific nature of the hazard posed by the substance or mixture. Here are some examples:

The letter "P" stands for "precautionary statement.” The first digit indicates the category of precaution as follows:

• "1" for general precautionary statements
• "2" for prevention-related precautions
• "3" for response-related precautions
• "4" for storage-related precautions
• "5" for disposal-related precautions

The two digits that follow correspond to the sequential numbering of specific precautionary statements related to each category. Here are some examples: