I. Changes in the properties of the chemical itself
1. Discovery of new hazards: When research or incident feedback reveals previously unidentified hazards in a chemical (such as added carcinogenicity, reproductive toxicity, environmental persistence, etc.), the manufacturer should immediately issue a public announcement and revise the label.
For example: A solvent originally classified as a "flammable liquid" may later be found to have neurotoxicity, requiring the addition of a health hazard pictogram and hazard description.
2. Changes in composition or formulation: If adjustments to product composition lead to a change in the hazard category (such as the addition of a strong oxidizing agent), even if the name remains the same, the label content must be reassessed and updated.
II. Updates to regulations and standards
1. Revision of national mandatory standards: The current "Regulations for Writing Chemical Safety Labels" (GB 15258-2009) is transitioning to a new version, with several updates to be implemented starting in 2025.
The following changes have been made to the labeling of hazardous chemicals:
Added a "Hazardous Chemicals Safety Information Code" (QR code)
Adjusted the hazard description order (Physical → Health → Environmental)
Optimized small package labeling requirements (applicable range adjusted to ≤125 mL or 100 g)
References to the original appendix for example precautions instructions, now guided by GB/T 17519.
Enterprises should complete label updates during the transition period to ensure compliance with the latest requirements.
2. Classification Standard Upgrade With the implementation of the GB 30000 series standards, especially GB 30000.1-2024 aligning with the eighth revision of GHS, the classification results for some chemicals may change, requiring corresponding label updates.
III. Missing or Incorrect Label Information
1. Incomplete or Inaccurate Original Label Information Errors such as incorrect supplier information, invalid emergency contact numbers, or missing hazard pictograms should be corrected immediately upon discovery.
2. Updated Safety Data Sheet (SDS) Label content must be consistent with the SDS. If the SDS is revised due to new data or regulatory changes, the label should also be updated accordingly.
IV. Changes in Packaging or Usage
1. Repackaging or Repackaging: When transferring chemicals to other containers, users must affix new safety labels to the new containers, especially if the original packaging is unlabeled or the label is damaged.
2. Kits or Combination Packaging: For toolkits, lab kits, etc., containing multiple hazardous chemicals, the outer packaging must indicate the critical safety information for each component, or indicate "Please check the complete label inside."
V. Damaged or Expired Labels
1. Labels Falling Off, Blurring, or Damaged: Even if the content remains unchanged, if the label is not clearly legible, the user should verify and re-affix it.
2. Changes in Product Batch Number or Production Date: Each batch of chemicals leaving the factory should be labeled with the corresponding information, and new labels must be made for new batches.
VI. Timeliness Requirements for Updates: "Timely updates" in the industry generally refers to completing revisions within 30 working days of obtaining new information.
For mandatory updates mandated by regulations, the officially issued transition period requirements should be followed, generally 6–12 months.
