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Caustic Ingestion. Esophagus, pharynx, larynxBasesDrain cleanersElectric dishwasher soapHair relaxantAcidsBleaches . Caustic Ingestion. Late 19th century - lye commercially availableEarly 20th century Chevalier JacksonFederal Caustic Act of 19271970 Poison Prevention Packaging Act1972
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