Learn Glossary preservative

Boric Acid

Level 4Significant concernsIn Winter's Dictionary

Boric Acid is a preservative — Antiseptic with bactericidal and fungicidal properties; fungus control on citrus fruit

What it does

Antiseptic with bactericidal and fungicidal properties; fungus control on citrus fruit

Where you'll see it

Citrus fruit fungus control

What the research says

Severe poisonings have followed both ingestion and topical application to abraded skin. AMA warned of possible toxicity.

Regulatory status

  • US FDA: NUL
  • EU: approved
  • Notes: FDA tolerance 8 ppm boron residues; still widely used despite AMA warnings

Sources

  • A Consumer's Dictionary of Food Additives (Winter): still widely used despite repeated warnings from the American Medical Association of possible toxicity