over exposure, low order OHS

[ilmatar3]

Please help me to translate "over exposure" and "low order" in Russian-

This Product Health and Safety Data (MSDS)
for mineral oil.
Effects of over exposure.
Skin contact: Low order of acute toxicity.
(Низкий уровень, может быть?)

[Alexander Oshis]

1) "overexposure" depends on the material, which affected the exposed person. Can be, e.g., "отравление (literally, poisoning)" or "длительный контакт" (lit: long-term contact), or "длительное воздействие" (lit: long-term exposure).
2) низкий уровень / низкая концентрация