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31. Risks and Financial Instruments (Details 10)
R$ in Thousands
Dec. 31, 2017
BRL (R$)
Scenario I  
Currency swaps receivable in U.S. dollars  
U.S. Dollar/ Real swaps R$ 198,138
Debts/firm commitments in dollars (198,130)
Net effect 8
Currency swaps payable in U.S. dollars  
Real/ U.S. Dollar swaps (97)
Gross margin of Oxiteno 97
Net effect 0
Interest rate swap (in Brazilian Reais) – Debentures—CRA  
Fixed rate swap - CDI 13,691
Fixed rate debt (13,691)
Net effect 0
Scenario II  
Currency swaps receivable in U.S. dollars  
U.S. Dollar/ Real swaps 690,432
Debts/firm commitments in dollars (690,415)
Net effect 17
Currency swaps payable in U.S. dollars  
Real/ U.S. Dollar swaps 7,486
Gross margin of Oxiteno (7,486)
Net effect 0
Interest rate swap (in Brazilian Reais) – Debentures—CRA  
Fixed rate swap - CDI 95,292
Fixed rate debt (95,292)
Net effect 0
Scenario III  
Currency swaps receivable in U.S. dollars  
U.S. Dollar/ Real swaps 1,182,726
Debts/firm commitments in dollars (1,182,700)
Net effect 26
Currency swaps payable in U.S. dollars  
Real/ U.S. Dollar swaps 15,069
Gross margin of Oxiteno (15,069)
Net effect 0
Interest rate swap (in Brazilian Reais) – Debentures—CRA  
Fixed rate swap - CDI 192,204
Fixed rate debt (192,204)
Net effect R$ 0