Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes ______       No ___X___

PETROLEO	ULTRAPAR	BRASKEM S.A.
BRASILEIRO S.A.	PARTICIPAÇÕES S.A.	PUBLICLY TRADED COMPANY
PUBLICLY TRADED COMPANY	PUBLICLY TRADED COMPANY	CNPJ/MF Nº 42.150.391/0001-70
CNPJ/MF Nº 33.000.167/0001-01	CNPJ/MF Nº 33.256.439/0001-39	NIRE 29.300.006.939
NIRE 33.300.032.061	NIRE 35.300.109.724

MATERIAL EVENT

ACQUISITION OF THE IPIRANGA GROUP

Petróleo Brasileiro S.A. (“Petrobras”), Ultrapar Participações S.A. (“Ultrapar”) and Braskem S.A. (“Braskem”) hereby announces in accordance with, and for the purposes of CVM Rule Nº 358/02, that Ultrapar has celebrated, with the acknowledgement of Petrobras and Braskem, a contract with the controlling shareholders (“ Controlling Shareholders of Ipiranga”) of Refinaria de Petróleo Ipiranga S.A. (“RPI”) and Distribuidora de Produtos de Petróleo Ipiranga S.A. (“DPPI”) on its own behalf, for the acquisition of all the shares held by the Controlling Shareholders of Ipiranga in RPI, DPPI and in Companhia Brasileira de Petróleo Ipiranga (“CBPI”) (“Sale and Purchase Agreement”) and as commission agent, acting on behalf of Braskem and Petrobras for the acquisition of the petrochemical assets, and in the case of Petrobras, specific distribution assets.

After the completion of the acquisition, the businesses of the Ipiranga Group will be managed by Petrobras, Ultrapar and Braskem. Ultrapar will hold the fuel and lubricant distribution businesses located in the South and Southeast regions of Brazil (“Southern Distribution Assets”), Petrobras will hold the fuel and lubricant distribution businesses located in the North, Northeast and Central West regions of Brazil (“Northern Distribution Assets”), Petrobras and Braskem will hold the petrochemical assets, represented by Ipiranga Química S.A. and Ipiranga Petroquímica S.A. (“IPQ”) and for IPQ’s stake in Copesul – Companhia Petroquímica do Sul (“Copesul”) in the proportion of 60% for Braskem and 40% for Petrobras (“Petrochemical Assets”). The assets related to oil refining operations held by RPI will be shared equally between Petrobras, Ultrapar and Braskem, owned by such companies.

I -RATIONALE

Through this acquisition, Petrobras, Ultrapar and Braskem are taking an important step in the reorganization and consolidation of sectors that are fundamental to the growth of the Brazilian economy, creating differentiated investment conditions.

The Ipiranga Group, one of Brazil’s largest and most traditional corporate conglomerates, operates in the same segments as Petrobras, Ultrapar and Braskem. The Ipiranga Group is Brazil’s second-largest fuel distributor, with a network of 4,240 service stations. It also has a major share of the petrochemical market, with the production of 650,000 tons of petrochemical resins through IPQ, as well as sharing joint control with Braskem of Copesul – Brazil’s second-largest petrochemical raw materials complex. In 2006, the consolidated net revenues of the Ipiranga Group amounted to R$ 31 billion, with EBITDA of R$ 1.0 billion and net income of R$ 534 million.

In line with its Strategic Plan, Petrobras has been investing selectively in Brazil's petrochemical sector and in the Southern Cone, in projects which add value to its oil, natural gas and refining businesses, acting in an integrated manner. The acquisition of these assets will result in an increase in Petrobras’ petrochemical shareholding portfolio, contributing to the consolidation of the Southern Petrochemical Complex.

In the distribution sector, Petrobras intends to consolidate its position in the sector, strengthening its position in the North/Northeast and Central West of Brazil, and under the contract is authorized to use the Ipiranga brand name for up to 5 years. Currently, Petrobras has a global distribution market share of 33.8%, with 6,200 service stations in Brazil and more than 1,000 service stations in other countries, being the largest and only service station network that has a presence throughout Brazil. In the wholesales market, Petrobras holds a consumer portfolio of more than 12,000 clients in the industrial, aviation, transportation, electricity generation markets, among others. Petrobras has major diversity as a result of its extensive logistics network and wide experience in the distribution sector, in which it has been operating for 35 years. Petrobras sees this operation as an opportunity to create value.

Ultrapar, the largest LPG distributor in Brazil, will, following the successful completion of the transactions described herein, become the second-largest company in the vehicle fuel distribution business in Brazil, holding 15% of this market. Ultrapar believes that if it utilizes its independent dealers network and logistics management skills with discipline and determination, it will be able to increase effeciencey in Ipiranga’s distribution process.

For Braskem, Latin America's leading company in the production and sale of thermoplastic resins, the acquisition of the Petrochemical Assets of the Ipiranga Group, represents an important step in consolidating and strengthening Brazilian's petrochemical industry and is in alignment with the company’s strategy of achieving growth and adding value. After the completion of this transaction, Braskem will have further strengthened its leadership in the thermoplastic resin market, contributing to increasing the level of competitiveness in Brazil's petrochemical production chain by expanding its production capacity and increasing the range of added value of services available, based on a differentiated structure of innovation and technology.

II. TRANSACTION SUMMARY

The transaction is divided into 5 stages: (1) Acquisition of the Shares of the Controlling Shareholders of Ipiranga by Ultrapar; (2) Mandatory Tender Offer (tag along) for the acquisition of the remaining RPI, DPPI, CBPI and IPQ ordinary shares; (3) Tender Offer for the delisting of Copesul; (4) exchange offer by Ultrapar of the shares issued by RPI, DPPI and CBPI; and (5) segregation of the Southern Distribution Assets, Northern Distribution Assets and Petrochemical Assets and the consequent transfer of the Petrochemical Assets to Braskem and Petrobras and the Northern Distribution Assets to Petrobras.

2.1 Acquisition of the shares of the Controlling Shareholders of Ipiranga: Ultrapar will acquire, for the correct and adjusted price of R$ 2 billion, from the Controlling Shareholders of Ipiranga, shares issued by RPI, DPPI and CBPI, represented by the following shareholding stakes: (a) 61.6% of the ordinary shares issued by RPI, (b) 13.8% of the preferred shares issued by RPI, (c) 65.5% of the ordinary shares issued by DPPI, (d) 12.6% of the preferred shares issued by DPPI, (e) 3.6% of the ordinary shares issued by CBPI, and (f) 0.4% of the preferred shares issued by CBPI. It is estimated that this stage of the transaction will be concluded within approximately 30 days, counting from the present date (“Completion”). The table below shows the price per share paid to the Controlling Shareholders of Ipiranga Group.

2.2 Mandatory Tender Offers (tag along) for the shares of RPI, DPPI and CBPI. As a result of the direct and indirect divestment of control of the listed companies RPI, DPPI and CBPI, Ultrapar, under the terms of Art. 254-A of Law 6,404/76 and CVM Rule Nº 361, within a period of up to 30 days after the date of the Completion, will file with the CVM, a request to register tender offers for the purchase of ordinary shares held by the respective minority shareholders of RPI, DPPI and CBPI (“Mandatory Tender Offers”) for a price equivalent to 80% of the price per share paid to the Controlling Shareholders of Ipiranga for the ordinary shares in these companies held by them:

2.2.1. Mandatory Tender Offers (tag along) IPQ. Braskem and Petrobras, in accordance with the requirements of Art. 254-A of Law nº 6,404/76 and CVM Rule nº 361, within a period of up to 30 days after the date of the Completion, will file with the CVM, a request to register a mandatory tender offer for the purchase of ordinary shares held by the minority shareholders of IPQ.

2.3 Public Tender Offer for the delisting of Copesul. Within 30 days of Completion, a request will be filed with the CVM for the registration of a public tender offer for the de-listing of Copesul, according to the terms of Art. 4º, § 4º, of Law 6,404/76 and CVM Rule No. 361. The public tender offer will be carried out at a price of R$ 37.60 per ordinary share, using a valuation calculated by the discounted cash flow method.

2.4 Corporate Restructuring at Ultrapar. After the conclusion of the Mandatory Tender Offers, Ultrapar will be carrying out a corporate restructuring in order to: (i) simplify the corporate structure of the Ipiranga Group, concentrating all the shareholders into one company listed on the stock exchange, resulting in a reduction in costs and increased share liquidity and (ii) allow the segregation and transfer of the Petrochemical Assets, Northern Distribution Assets and Southern Distribution Assets (“Corporate Restructuring”). In this context, Ultrapar will carry out share exchange transactions, under the terms of Art. 252 of Law 6,404/76, in which it will offer to exchange its preferred shares for the remaining outstanding ordinary and preferred shares of RPI, DPPI and CBPI (“Share Exchange Transactions”). Following successful completion of the Share Exchange Transactions, RPI, DPPI and CBPI will become wholly-owned subsidiaries of Ultrapar.

2.5 Segregation of Assets. After the completion of the Share Exchange Transactions, Ultrapar will, carry out: (i) a capital reduction at RPI and CBPI, for the purpose of transferring the Petrochemical Assets directly to Ultrapar, to be subsequently handed over to Petrobras and Braskem under the terms of the commission agreement and (ii) Ultrapar will carry out a demerger of CBPI in order to transfer the Northern Distribution Assets, to a company controlled by Petrobras.

III - RELATIONSHIP BETWEEN ULTRAPAR, BRASKEM AND PETROBRAS

Commission. Ultrapar is acting as a commission agent, under the terms of Articles 693 to 709 of the Brazilian civil code, for Petrobras and Braskem for the purpose of the acquisition of the Petrochemical Assets, and exclusively for Petrobras in the acquisition of the Northern Distribution Assets. These assets will be handed over to their respective principals immediately after the conclusion of the Corporate Restructuring. Petrobras and Braskem and will carry out payments in installments to Ultrapar, for the amounts agreed for the purpose of fulfilling the commission contract.

IV - SHAREHOLDERS AGREEMENT

Shareholders’ Agreement. The Parties have entered into a Shareholders Agreement, so that: (i) the Southern Distribution Assets will be controlled and managed by Ultrapar; (ii) the Petrochemical Assets, will be controlled and managed by Braskem and Petrobras, in the respective proportions of 60% and 40%; (iii) the Northern distribution assets will be controlled and managed by Petrobras and (iv) assets related to oil refinery business of RPI will be controlled and managed jointly by Petrobras, Ultrapar and Braskem.

V - GENERAL TERMS

5.1 CADE. The transaction will be presented for approval to the Brazilian Anti-trust Authorities (CADE – Administrative Board for Economic Defense), the Secretary for Economic Rights – SDE, and the Secretary for Economic Monitoring– SEAE), within the time limit and in the manner prescribed by the current legislation in force.

5.2 Location of documents for inspection. More information may be obtained from the investor relations departments of Petrobras, Ultrapar and Braskem, at the addresses below:

5.3 Future Communications. The managements of Ultrapar, Petrobras and Braskem will be keeping the market and their shareholders informed as they implement the transactions described herein, or as otherwise deemed necessary.

5.4. Ultrapar Share Buyback Program. Following this announcement. Ultrapar intends to actively engage in its share buyback program.

São Paulo, March 19, 2007

SIGNATURES

        Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: March 29, 2007