The information in this preliminary pricing supplement is not complete and may be changed. This preliminary pricing supplement and the accompanying prospectus supplement and prospectus are not offers to sell these securities and are not soliciting an offer to buy these securities in any jurisdiction where the offer or sale is not permitted.

Subject to completion

Preliminary Pricing Supplement dated June 14, 2021

Filed under 424(b)(3), Registration Statement No. 333-232862-01

Pricing Supplement No. 56 - Dated Monday, June 14, 2021 (To: Prospectus Dated July 26, 2019, and Prospectus Supplement Dated July 26, 2019)

CUSIP

Principal

Gross

Net

Coupon

Coupon

Maturity

1st Coupon

1st Coupon

Survivor’s

Product

Number

Amount

Selling Price

Concession

Proceeds

Rate

Frequency

Date

Date

Amount

Option

Ranking

26054L3J0

100

%

1.250

%

1.150

%

Semi- Annual

06/15/2026

12/15/2021

$

5.46

Yes

Senior Unsecured Notes

Redemption Information: Callable at 100.000% on 12/15/2021 and any time thereafter.

Joint Lead Managers and Lead Agents: Incapital LLC Agents: Citigroup, Morgan Stanley, Wells Fargo Advisors

This tranche of The Dow Chemical Company InterNotes will be subject to redemption at the option of The Dow Chemical Company, in whole or in part, on the interest payment date occurring on 12/15/2021 and any time thereafter at a redemption price equal to 100% of the principal amount of such The Dow Chemical Company InterNotes plus accrued interest thereon, if any, upon not less than 10 nor more than 60 days prior notice to the noteholder and the trustee, as described in the prospectus.

Investment advisers purchasing for the account of their advisory clients and selected dealers purchasing on an agency basis or for their own accounts on a principal or riskless principal basis, may be offered Notes at a 0.8500% discount to the public offering rate. Notes purchased by selected dealers in level-fee and retirement accounts may be sold to such accounts at a discount up to 0.8500% to the public offering price, thereby not retaining any portion of the discount as compensation.

26054L3K7 100% 1.800% 2.200% Semi-Annual 06/15/2031 12/15/2021 $10.45 Yes Senior Unsecured Notes

Redemption Information: Callable at 100.000% on 12/15/2021 and any time thereafter.

Joint Lead Managers and Lead Agents: Incapital LLC Agents: Citigroup, Morgan Stanley, Wells Fargo Advisors

This tranche of The Dow Chemical Company InterNotes will be subject to redemption at the option of The Dow Chemical Company, in whole or in part, on the interest payment date occurring on 12/15/2021 and any time thereafter at a redemption price equal to 100% of the principal amount of such The Dow Chemical Company InterNotes plus accrued interest thereon, if any, upon not less than 10 nor more than 60 days prior notice to the noteholder and the trustee, as described in the prospectus.

Investment advisers purchasing for the account of their advisory clients and selected dealers purchasing on an agency basis or for their own accounts on a principal or riskless principal basis, may be offered Notes at a 1.2500% discount to the public offering rate. Notes purchased by selected dealers in level-fee and retirement accounts may be sold to such accounts at a discount up to 1.2500% to the public offering price, thereby not retaining any portion of the discount as compensation.

26054L3L5 100% 3.150% 3.200% Semi-Annual 06/15/2051 12/15/2021 $15.20 Yes Senior Unsecured
Notes

Redemption Information: Callable at 100.000% on 12/15/2021 and any time thereafter.

Joint Lead Managers and Lead Agents: Incapital LLC Agents: Citigroup, Morgan Stanley, Wells Fargo Advisors

This tranche of The Dow Chemical Company InterNotes will be subject to redemption at the option of The Dow Chemical Company, in whole or in part, on the interest payment date occurring on 12/15/2021 and any time thereafter at a redemption price equal to 100% of the principal amount of such The Dow Chemical Company InterNotes plus accrued interest thereon, if any, upon not less than 10 nor more than 60 days prior notice to the noteholder and the trustee, as described in the prospectus.

Investment advisers purchasing for the account of their advisory clients and selected dealers purchasing on an agency basis or for their own accounts on a principal or riskless principal basis, may be offered Notes at a 2.4000% discount to the public offering rate. Notes purchased by selected dealers in level-fee and retirement accounts may be sold to such accounts at a discount up to 2.4000% to the public offering price, thereby not retaining any portion of the discount as compensation.

  The Dow Chemical Company   2211 H.H. Dow Way   Midland, Michigan 48674   Trade Date: Monday, June 21, 2021 @ 12:00 PM ET Settle Date: Thursday, June 24, 2021 Minimum Denomination/Increments: $1,000.00/$1,000.00 Initial trades settle flat and clear SDFS: DTC Book Entry only DTC Number 0235 via RBC Dain Rauscher Inc   If the maturity date or an interest payment date for any note is not a business day (as such term is defined in prospectus), principal and premium, if any, and interest for that note is paid on the next business day, and no further such interest will accrue from, and including, the maturity date or such interest payment date.   InterNotes^® is a registered trademark of Incapital Holdings LLC. All Rights Reserved.   The Dow Chemical Company   The Dow Chemical Company InterNotes