June 28 (Reuters) - Dow Chemical Co:
* Dow and DuPont provide update on merger
* Dow Chemical Co says companies reaffirmed their expectation to close merger in august 2017
* Dow Chemical Co - boards have jointly commenced review and have engaged Mckinsey & Co. To assist companies in assessment
* Dow Chemical Co - DowDuPont board is expected to review results soon after merger closes
* Dow Chemical Co - boards of Dow, DuPont "support a comprehensive portfolio review for dowdupont"
* Dow - "if results of our review demonstrate there is net greater long-term value creation to be realized through a change in portfolio, it will be pursued" Source text for Eikon: Further company coverage: