Chemical Antimicrobials Used in Foods -
| Chemical | Max.permitted concentration |
| Benzoic acid | 0.1% |
| Methyl paraben | 0.1% |
| Propyl paraben | 0.1% |
| Sodium nitrite | 500 ppm |
| Sodium nitrite | 200 ppm |
| Sorbastes | 0.1% |
| Acetic acid | 0.12-0.14 mg/ml in wines |
| Propylene oxide | 300ppm |
| Ethylene oxide | residue not to exceed 50ppm |
| Sulfites | Variable with food stuff |
| Propionates | 0.1% |
| Potassium metabisulphite | 0.05% |