| Rank | Heat | Athlete | Time | Qualification Mark | Records | + |
|---|---|---|---|---|---|---|
| 1 | 2 |
| 36.96 | Q | WR | + |
| 2 | 1 |
| 38.28 | Q | AS | + |
| 3 | 1 |
| 39.26 | Q | + | |
| 4 | 2 |
| 39.71 | Q | + | |
| 5 | 1 |
| 40.18 | Q | + | |
| 6 | 2 |
| 40.39 | Q | OC | + |
| 7 | 2 |
| 40.71 | Q | + | |
| 8 | 1 |
| 41.05 | Q | + | |
| 9 | 1 |
| 41.33 | + | ||
| 10 | 2 |
| 41.97 | + | ||
| 11 | 1 |
| 44.41 | + | ||
| 12 | 2 |
| 44.54 | + | ||
| 13 | 1 |
| 44.78 | + | ||
| 14 | 2 |
| 45.90 | + | ||
| 15 | 2 |
| 48.54 | + | ||
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