Introduction:

The lubricant is a medium whose function is to prevent direct contact between surfaces, reducing friction and wear, thus reducing the heat and waste generated during this process. In addition, it can cool and hermetically seal the areas of friction. The losses of mineral Vaseline released into the environment have become a serious problem for the ecosystem. Due to the growing concern related to the environmental impact of mineral greases, eco-friendly alternatives are being sought, vegetable oils among them, such as Jatropha curcas oil.

Objective:

To determine the toxicity of hydraulic biolubricants formulated from modified Jatropha curcas oil chemically modified.

Materials and Methods:

A sensitivity bioassay was carried out with lettuce seeds (Lactuca sativa) in a Petri dish and in soil for different mixtures of biolubricants.

Results and Discussion:

It was determined that biolubricants formulated with Jatropha curcas oil are classified as toxic for Lactuca sativa seeds, both in the plate and in the ground, five days after sowing.

Conclusions:

These biolubricants showed phytotoxic effects in the root and apical system. The mixtures corresponding to 2.5% on the plate were the least toxic for the three biolubricants tested, although the percentages of inhibition were greater than 70%.

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