PITTSBURGH — Pittsburgh's H.J. Heinz plans to sell a stronger variety of vinegar for use as an all-natural cleaning solution.

The company announced plans for its “Heinz All Natural Cleaning Vinegar” on Monday.

The vinegar will have 6 percent acidity, making it about 20 percent stronger than its traditional white distilled vinegar. It will sell for $3.79 per gallon.

The ketchup and condiment giant has sold vinegar for more than 140 years.

NEW YORK — Facebook’s growth appears to be slowing, particularly in the U.S., according to a report in the Wall Street Journal.Unique U.S. visitors to the wildly popular social media site rose 5 percent in April to 158 million, according to data attributed to comScore. ComScore confirmed the data.That’s the slowest growth rate since comScore started tracking data in 2008.Users spent more than six hours a month on the site in April, up 16 percent from the prior year. Still, that’s a slower growth rate than the 23 percent increase in 2011, according to data.