An oxidizer: it releases oxygen that makes other materials ignite more easily and burn more fiercely. Keep it away from combustibles.
This is the official UN GHS artwork — public domain, free to reuse in training decks, wall posters, workplace signs, and labels.
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On a printed label the symbol must sit in the red diamond frame, point-up, as shown — the frame is part of the pictogram.
When SDS HQ authors an SDS or a container label, it assigns the hazard statements, signal word, pictograms, and precautionary statements from these same tables — automatically, with the calculation shown.