(Commission File No. 1-14862 )

São Paulo, August 4, 2017

TO BM&FBOVESPA S.A. - Securities, Commodities and Futures Exchange

Company Oversight Department

Attn:     Mr. Nelson Barroso Ortega

Cc.:      Securities and Exchange Commission of Brazil (CVM)

Attn:     Mr. Fernando Soares Vieira

Company Relations Superintendent

Mr. Francisco José Bastos Santos

Market and Intermediary Relations Superintendent

Ref.: Official Letter 1336/2017-SAE

Dear Sir:

In reference to Official Letter 1336/2017-SAE (“Letter”), dated August 4, 2017, through which you requested clarifications from Braskem S.A. (“Braskem” or “Company”), as transcribed below:

 “Ref.: Request for clarification on news report

Dear Managers,

The news report published in the newspaper O Estado de São Paulo, on August 4, 2017, states, among other things, that:

1.  the petrochemical company Braskem is considering, within the renegotiation of its shareholders agreement, a change in its registered office and the trading venue of its stock to the Unites States – today, the company already has ADRs listed on the New York Stock Exchange;

2.  the rationale behind moving to the United States would make sense within the company’s current structure, since more than 50% of its revenue comes from outside of Brazil.

We request clarifications on the above items by August 7, 2017, including its confirmation or denial, as well as any other information deemed relevant.”

As requested, Braskem clarifies to the market and to its shareholders that:

(a)          it constantly is analyzing opportunities with the potential to add value to the Company and, consequently, for all of its shareholders, but that, at of this moment, not even a study exists of the alleged move of its headquarters and of the trading venue for its shares to the United States; and

(b)          with regard to the renewed discussion on Braskem’s Shareholders’ Agreement, the Company has already published a notice to the market on the matter, on July 18, 2017.

Furthermore, the Company takes this opportunity to clarify that, as per the notice to the market published on June 21, 2017, the investment approved for the construction of a new production polypropylene line at the site in La Porte, Texas, United States is of up to US$675 million, and not the amount reported in the article of up to US$2.2 billion.

The Company will keep the market duly informed of any facts deemed relevant involving the matter.

For more information, contact Braskem’s Investor Relations Department by calling +11 (3576-9531) braskem-ri@braskem.com.br or sending an e-mail to braskem-ri@braskem.com.br.

Sincerely,

Pedro van Langendonck Teixeira de Freitas
Chief Financial and Investor Relations Officer
Braskem S.A.

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