Attn.: Ms. Ana Lucia Pereira – Superintendent of Listing and Supervision of Issuers (Form 6-K)

Attn.: Ms. Ana Lucia Pereira - Superintendent of Listing and Supervision of Issuers

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

Re.: Official Letter B3 1280/2021-SLS of 09/20/2021

Dear Sirs,

We refer to Official Letter B3 1280/2021-SLS ("Letter"), dated of 09.20.2021, which you requested clarifications from Braskem S.A. ("Braskem" or "Company"), as transcribed below:

"Re.: Request for clarification on atypical oscillation

Dear Sir,

In view of the last fluctuations registered with the securities issued by this Company, the number of trades and the quantity traded, as below, we request you to inform until 09.21.2021, if there is any fact you may be aware that can justify them.

Preferred Shares PNA
Prices (R$ per share)
Date	Opening	Minimum	Maximum	Average	Closing	Var. %	Nº Trades	Quantity	Volume (R$)
09/06/2021	66.87	66.02	67.85	67.04	67.07	0.43	8,290	1,608,000	107,799,825,00
09/08/2021	66.50	64.65	67.88	66.05	65.28	-2.66	20,266	4,315,300	285,043,566,00
09/09/2021	65.80	65.20	67.85	66.73	67.08	2.75	18,330	3,700,900	246,953,985,00
09/10/2021	68.09	67.03	68.55	67.75	67.20	0.17	13,138	2,815,100	190,734,038,00
09/13/2021	68.09	66.91	68.40	67.58	67.40	0.29	8,255	1,756,200	118,685,014,00
09/14/2021	68.49	68.49	70.34	69.56	69.42	2.99	17,396	4,414,600	307,070,779,00
09/15/2021	69.79	69.05	70.55	70.00	70.17	1.08	15,129	3,422,100	239,563,740,00
09/16/2021	69.54	68.60	70.40	69.24	69.49	-0.96	12,019	2,929,500	202,848,251,00
09/17/2021	69.34	65.70	69.69	66.66	66.01	-5.00	21,032	4,992,900	332,835,156,00
09/20/2021*	62.79	59.97	63.19	61.80	59.97	-9.15	20,680	4,854,700	300,028,654,00

*Updated as of 2:56 p.m.

In this regard, Braskem clarifies that there was no material fact or act not disclosed by the Company that justifies the latest fluctuations recorded with the shares issued by this Company, nor with the number of trades and quantity traded in the period between 09.06.2021 to 09.20.2021.

Additionally, Braskem informs that on 09.13.2021 a favorable market report was published with a recommendation to buy the shares issued by the Company.

Finally, due to news published in the media regarding Braskem's sale plan to be presented by Novonor to its creditors, the Company clarifies that it is not part of any discussions by its shareholders about the sale of their equity interest in Braskem and is not aware of the information contained in the news, which is why it requested Novonor on 09.18.2021, having clarified it as described below. Such news was the subject of Official Letter 1,272/2021-SLS, whose response was filed by the Company on 09.20.2021.

"We refer to your e-mail, through which you request clarification on the news published in the newspaper Valor Econômico under the title: "Novonor, ex-Odebrecht, presents a new Braskem sales model ".

As you are aware, Novonor S.A. has started a process to sell its stake in Braskem S.A., in compliance with commitments assumed with its creditors, having even hired a financial advisor to conduct the studies, analyzes and recommendations for this purpose. These facts were previously communicated to you in compliance with the relevant legal provisions.

In the context of this process, Novonor S.A. is evaluating all possible alternatives for the sale of its participation in Braskem S.A. and compliance with the commitment assumed with its creditors, which includes, among all other existing alternatives, the sale of its participation through of the capital market. However, it should be noted that, at this time, there is no decision as to which alternative will be pursued by the Group.

With regard to the meeting with creditors mentioned in the subject in question, this meeting is part of the communication process that we regularly maintain with our creditors, a commitment that was also assumed by the Group in its restructuring and which has been strictly adhered to."

For more information, contact Braskem's Investor Relations Department by calling [phone] or by sending an e-mail to [e-mail].

Sincerely,

Pedro van Langendonck Teixeira de Freitas

Chief Financial and Investor Relations Officer

Braskem S.A.