Little Pro on 2019-10-19 Views: Update:2019-11-16
The UN GHS introduces a "safety net" classification for use when available data do not allow hazard classification under the formal GHS classification criteria but there are nevertherless some grounds for concerns. Currently, the safety net classification mainly refers to the chronic hazards to aquatic enviroments - category 4.
In this example, chronic 4 is used as a safety classification because poorly water soluable substance for which no toxicity is recorded at levels up to water solubility can still cause big concerns to the envrionment when the substance is both not rapidly degraded and has a potential to bio-accumulate.
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