sulfurous acid(redirected from H 2 SO 3)
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A colorless solution of sulfur dioxide in water, H2SO3, characterized by a suffocating sulfurous odor, used as a bleaching agent, preservative, and disinfectant.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
a colorless liquid, H2SO3, having a suffocating odor, used chiefly in organic synthesis and as a bleach.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.