The requirements for chemical labels are designed to clearly communicate the hazards and safe handling of chemicals to users. Key elements that must be included on chemical labels according to OSHA's Hazard Communication Standard (HCS) and international regulations such as the Globally Harmonized System (GHS) include:

• Product Identifier: The chemical name, code number, or batch number that identifies the chemical

• Supplier Identification: Name, address, and telephone number of the manufacturer, importer, or responsible party

• Hazard Pictograms: Standardized symbols that visually represent the type of hazard (e.g., flammable, toxic)

• Signal Word: A word such as "Danger" or "Warning" that indicates the severity of the hazard

• Hazard Statements: Standard phrases that describe the nature and degree of the chemical hazard

• Precautionary Statements: Instructions on how to handle the chemical safely to protect users

• Supplemental Information: Any additional relevant information, such as storage or disposal instructions, if applicable

Additional requirements include:

• Labels must be legible, prominently displayed, and in English (other languages can be added)

• Labels must be maintained in a legible condition throughout the chemical's use; if labels become damaged or fall off, containers must be relabeled

• For workplace labeling, labels must be appropriate to container size and visible in normal storage position

• In the EU, the label must also include a Unique Formula Identifier (UFI) to assist poison centers in emergencies

Chemical labels are limited in the amount of information they can convey, so Safety Data Sheets (SDS) accompany chemicals for detailed hazard and safety information

. In summary, chemical labels must clearly identify the chemical and its hazards using standardized elements (product identifier, supplier info, pictograms, signal word, hazard and precautionary statements) to ensure safe handling and compliance with regulations such as OSHA HCS and the EU CLP Regulation