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. 2017 Apr 19;12(4):e0175344. doi: 10.1371/journal.pone.0175344

Table 2. Data availability for chemicals used in routine oil and gas development.

Number of chemicals Proportion of all chemicals CASRN Mass data Toxicity data
151 30% Available Available Availablea
1 0% Available Unavailable Availablea
97 18% Available Available Unavailablea
43 8% Unavailable Available Unavailable
233 44% Unavailable Unavailable Unavailable

aDoes not include EPI Suite computational estimates for green algae ecotoxicity