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Protocol Considerations for Testing Surfactants and Surfactant-based Formulations in the Bovine Corneal Opacity and Permeability Assay

March 23, 2015
The Bovine Corneal Opacity and Permeability (BCOP) assay is an ex vivo test for predicting ocular irritation. For regulatory classification, OECD Test Guideline (TG) 437 specifies that liquid and solid surfactants may be tested as 10% aqueous dilutions for 10 minutes, although alternate dilutions and exposure times may be conducted with scientific rationale. Without question, surfactant solids should not be tested using the solid chemical protocol, since overexposure conditions are likely. In the absence of clear guidance from these regulatory...

Predicting Ocular Irritation of Surfactants Using the Bovine Corneal Opacity and Permeability Assay

January 1, 2014
The Bovine Corneal Opacity and Permeability (BCOP) assay is an ex vivo test used to evaluate ocular irritation. According to the OECD Test Guideline (TG) 437, the BCOP assay can be used to identify chemicals which induce severe/corrosive eye irritation and those that do not require classification. However, BCOP has historically under-predicted certain anionic surfactants, when tested according to the standard liquid protocol. Since neither the basis for selecting the appropriate surfactant test methods, nor the justification for modifications are...