| Lane | Swimmer | Team | Place | Time |
|---|---|---|---|---|
| 1 | 9 | 48.55 | ||
| 1 | 23 | DQ | ||
| 1 | 22 | 56.08 | ||
| 2 | 8 | 48.27 | ||
| 2 | 21 | 53.27 | ||
| 2 | 19 | 52.07 | ||
| 3 | 2 | 45.06 | ||
| 3 | 6 | 46.31 | ||
| 3 | 13 | 50.37 | ||
| 4 | 7 | 47.31 | ||
| 4 | 5 | 45.77 | ||
| 4 | 18 | 52.06 | ||
| 5 | 16 | 50.98 | ||
| 5 | 4 | 45.58 | ||
| 5 | 11 | 49.89 | ||
| 6 | 14 | 50.67 | ||
| 6 | 3 | 45.29 | ||
| 6 | 15 | 50.96 | ||
| 7 | 20 | 52.22 | ||
| 7 | 12 | 50.36 | ||
| 7 | 10 | 49.64 | ||
| 8 | 17 | 51.52 | ||
| 8 | 23 | NS | ||
| 8 | 1 | 40.18 |