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The Journal of Basic and Applied Zoology

Table 2 Comparative acute toxicity of benzene, toluene, ethylbenzene, and xylene acting singly against E. eugeniae

From: Histopathological and biochemical alterations in Eudrilus eugeniae (Kinberg 1867) as biomarkers of exposure to monocyclic aromatic hydrocarbons in oil impacted site

Test chemicals

LC 50 (95% CL)

Slope ± S.E.

Probit line equation

T.F.

Benzene

1.896 (4.600–1.046)

1.792 ± 0.669

Y = − 0.498 + 1.792x

2.41

Toluene

1.335 (4.565–0.824)

2.129 ± 0.755

Y = − 0.267 + 2.129x

1.10

Ethylbenzene

1.366 (2.632–0.861)

2.502 ± 0.874

Y = − 0.338 + 2.502x

1.13

Xylene

1.212 (3.292–0.758)

2.191 ± 0.751

Y = − 0.183 + 2.191x

1.00

  1. C.L. 95% confidence limit, S.E Standard error, T.F Toxicity factor
  2. T.F Toxicity factor = 96 h LC 50 value of other chemical
  3. 96 h LC 50 value of most toxic chemical
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