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Shareholders' equity - Capital (Details) - BRL (R$) | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Issued capital | R$ 1,443,108,000 | R$ 1,443,108,000 |
Issued capital [member] |  |  |
Number of shares issued | 55,429,851 | 55,429,851 | 261,920,439
Issued capital | R$ 1,443,108,000 | R$ 1,443,108,000 | R$ 261,920,439
Issuance new shares [Member] |  |  |
Number of shares issued | 0 | 177,977,323 |
Issued capital | R$ 0 | R$ 263,004,000 |
Capital reduction - transaction with HPX Corp, pursuant to the terms of the Business Combination [Member] |  |  |
Number of shares issued | 0 | (439,897,762) |
Issued capital | R$ 0 | R$ (524,924,439) |
Ambipar Participações e Empreendimentos S.A. [Member] |  |  |
Number of shares issued | 0 | 39,234,746 |
Issued capital | R$ 0 | R$ 841,029,236 |
PIPE investors [Member] |  |  |
Number of shares issued | 0 | 13,323,800 |
Issued capital | R$ 0 | R$ 555,892,823 |
HPX Corporation [Member] |  |  |
Number of shares issued | 0 | 1,916,100 |
Issued capital | R$ 0 | R$ 6,333,076 |
Others Investors [Member] |  |  |
Number of shares issued | 0 | 955,205 |
Issued capital | R$ 0 | R$ 39,852,865 |

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