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Inventories - Movements in the Provision for Losses (Detail) - BRL (R$) R$ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Classes of current inventories [abstract] |  |  |  |
Provisions for losses, beginning |  | R$ 40,993 | R$ 40,724 | R$ 42,587
Reversals to net realizable value adjustment |  |  |  | (5,174)
Additions to net realizable value adjustment |  | 5,974 | 2,245 |
Additions of obsolescence and other losses |  |  |  | 4,296
Reversals of obsolescence and other losses |  | (5,184) | (1,976) |
Oxiteno Andina | [1] |  |  | (985)
Reclassification to assets held for sale |  | (28,705) |  |
Provisions for losses, ending |  | R$ 13,078 | R$ 40,993 | R$ 40,724
[1] | Refers to the asset write-offs of Oxiteno Andina in 2019.

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- Definition The amount recognised resulting from the write-down of inventories to net realisable value or reversals of those write-downs. [Refer: Inventories] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 98 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_98_a&doctype=Standard -URIDate 2021-03-24 + Details
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