| N propyl bromide is a chemical alternative to perc, and an option that requires minimal retrofitting to adopt. |
| Other antioxidants include the phenol derivatives BHA, BHT, TBHQ and propyl gallate. |
| The four main parabens in use are methyl, ethyl, propyl and butyl parabens. |
| In common with other alkyl groups, both forms of the propyl group modify the behavior of a functional group. |
| In one of my dreams, for instance, there is talk of an injection with propyl. |
| The broth had been supplemented with either L-ascorbic acid or propyl gallate alone or in combination with lactic acid. |
