An excerpt from OSHA’s Standard Interpretations Page
OSHA recognizes that the use of pH buffering solutions may aid in preventing skin problems where there is exposure to wet cement. Therefore, our response to your question is a qualified “yes.” Providing pH buffer solution could meet the requirements of OSHA’s sanitation standards as long as the use of the pH buffer solution would enable employees to remove the substance(s) that pose(s) the dermal hazard(s).