If ingested, chromium is not readily absorbed through the wall of the intestine. Antacids are not recommended as a treatment for ingestion of chromium.
Antacids increase slightly the absorption of chromium through the wall of the intestine.
This is reflected in the higher water and airborne concentration limits. Perhaps of more importance than the radiation insult of Cr-51 are its chemical effects on living systems. Potassium chromate is no doubt a chemical toxin. No toxic effects from oral intake have been observed in humans. An individual readily recognizes when he or she is approaching the toxic level because of irritation to the skin and the nasal passages.