GHS Bridging Principles

GHS Bridging Principles are mainly used to classify un-tested mixtures according to GHS.

Dilution: Tested mixture A is diluted with less or equally hazardous ingredient B. A+B=A;

Batching: Mixture A & B are two batches produced under same conditions. A=B;

Highly hazardous mixtures: Mixture A is classified at its highest hazard category, for example, acute toxicity category 1. B is more concentrated than A. B=A;

Interpolation:Mixture A and B share the same hazardous ingredient and classification. If the concentration of the hazardous ingredient in mixture C is in-between, C=A=B;

Substantially similar mixtures:For two mixtures A+B and C+B, if A is similar to C in concentration & hazard data and B's concentration is similar in two mixtures, A+B=C+B;

It shall be noted that bridging principles cannot be applied to all GHS health or environmental hazards. 

Read more: GHS Mixture Classification