GHS Safety Data Sheet Interpretation: SDS for Dangerous Goods Classification

Using Safety Data Sheets for Dangerous Goods Classification

The GHS (Globally Harmonized System) Safety Data Sheet is the primary reference document for determining whether a product is classified as a dangerous good under IATA DGR and IMDG Code. Section 14 (Transport Information) provides direct classification data, but experienced shippers know that accurate classification often requires cross-referencing multiple SDS sections.

Key SDS Sections for Transport Classification

Section 14 lists UN number, proper shipping name, hazard class, packing group, and any special provisions. However, Section 2 (Hazard Identification) reveals GHS classifications that may trigger transport regulation. Section 3 (Composition) identifies hazardous ingredients and concentrations. Section 9 (Physical Properties) provides flash point, pH, and other data critical for classification verification. Relying solely on Section 14 risks missing subsidiary hazards or misclassifications.

Common SDS Pitfalls

SDS documents can be inaccurate, outdated, or incomplete. Manufacturer formulation changes may not immediately update Section 14 transport data. Some SDS documents list “Not Regulated” based on one transport mode while the product is regulated for others. Freight forwarders should verify SDS Section 14 data against actual product properties in Sections 2, 3, and 9 before accepting classification at face value.

Flash Point and Classification

Flash point data in Section 9 is critical for Class 3 (Flammable Liquid) classification. Products with flash points below 60°C (closed cup) or 65.6°C (open cup) are generally regulated. Flash point also determines packing group assignment: PG I (boiling point ≤35°C), PG II (flash point <23°C), PG III (flash point 23-60°C). Incorrect flash point reporting leads to misclassification and shipping violations.

pH and Corrosive Classification

Section 9 pH data helps determine Class 8 (Corrosive) classification. Extreme pH values (below 2 or above 11.5) indicate potential corrosivity, but classification ultimately depends on dermal corrosion test data or metal corrosion rates. Logistics providers handling chemical products should cross-reference pH with Section 11 (Toxicological Information) for complete hazard assessment.

Marine Pollutant Identification

Section 12 (Ecological Information) provides aquatic toxicity data that determines marine pollutant and environmentally hazardous substance classification. LC50 and EC50 values for fish and aquatic invertebrates, combined with biodegradation and bioaccumulation data, trigger IMDG Code marine pollutant designation. Many shippers miss this subsidiary hazard because they focus exclusively on Section 14.

Go Freight’s SDS Review Services

Go Freight provides SDS interpretation and dangerous goods classification review from South Florida. Our hazmat team verifies product classifications against complete SDS data to ensure accurate, compliant shipping of your chemical products.