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If you took a human egg cell that was fertilized in vitro and sprayed some hand sanitizer on it would it die?

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Yes, most likely. Alcohol-based hand sanitizers are at least 60% alcohol (ethanol or isopropanol). Alcohol concentrations as low as 15% are efficient at killing cultured mammalian cells.

See: Toxicity of Ethanol in Low Concentrations: Experimental Evaluation in Cell Culture

All cells were killed by a 15-s exposure to 30-40% ethanol while a concentration as low as 15-20% gave a total response after 5-10-min exposures.

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