Hazard Warning Label Requirements: Six Mandatory Elements for Workplace Compliance

Every hazard warning label in the workplace must contain six specific elements to ensure clear hazard communication and regulatory compliance (aligned with GHS, WHMIS 2015, OSHA HazCom 2012). Missing any element renders the label non-compliant.

1. Chemical Identity and Name: Product identifier matching the Safety Data Sheet (SDS)—chemical name, common name, trade name, or code number.
2. Signal Word: DANGER (severe hazards) or WARNING (less severe). Only one per label; "CAUTION" is not a GHS signal word.
3. Hazard Statement(s): Standardized phrases describing the nature and degree of hazard (e.g., "Fatal if swallowed," "Causes skin irritation," "May cause cancer"). Assigned by hazard class/category.
4. Precautionary Statement(s): Standardized phrases for prevention, response, storage, and disposal (e.g., "Wear protective gloves," "IF IN EYES: Rinse cautiously with water for several minutes," "Store locked up," "Dispose of contents/container per local regulations").
5. Supplier Identifier: Name, address, and telephone number of the manufacturer, importer, or responsible party.
6. Date of Label Preparation or Last Update: Ensures currency; critical when classifications change or new hazard data emerges.

Additional Label Elements (Often Required)

• Pictograms: Red diamond-on-point symbols (flame, skull, corrosion, health hazard, etc.) for each hazard class.
• Supplemental Information: Non-harmonized data (e.g., NFPA/HMIS ratings, first-aid details, PPE icons) if not contradictory.
• Batch/Lot Number: For traceability.

Workplace Labeling for Secondary Containers

When chemicals are transferred to secondary containers (spray bottles, dip tanks, beakers), the workplace label must include, at minimum: product identifier and general hazard information (words, pictures, symbols) sufficient for safe handling. Full supplier label is best practice.

Compliance Imperative

Incomplete labels expose workers to unidentified risks and employers to citations, fines, and liability. Audit labels regularly—especially after SDS updates or new chemical introductions.