Costco Wholesale Corp. has taken down “no preservatives” labels from signs and online listings for its Kirkland rotisserie chicken following a proposed class action by two California consumers alleging the claim was deceptive. The company told MEAT+POULTRY it “removed statements concerning preservatives” to maintain consistent labeling. It added that ingredients like carrageenan and sodium phosphate, which aid moisture retention and texture, are approved by food safety regulators. Wesley M. Griffith, the plaintiffs’ attorney, said Costco’s quick removal of the wording confirms the “no preservative” claims were inaccurate. The clash centers on a popular prepared-food item, hitting retailers and food producers as regulators zero in on straightforward ingredient claims that influence buyers right at checkout. Costco shares gained roughly 1.6% in Tuesday’s morning session.