YT2095
Executive Chef
indeed I was, and yes it`s a very good reducing agent, although in plants it`s rarely the free acid but rather Oxalate salts.Michael in FtW said:I assume you're talking about Bar Keepers Friend being primarily oxalic acid, YT? Actually, oxalic acid is both a mild abrasive and a bleaching agent ... it can be used to bleach wood, remove stains like tea, coffee, mustard, and Kool Aid, or fruit juices as well as rust, hard water deposits and metal tarnish. When I use it I scrub with BKF, rinse well with water, then wash with a liquid dishwashing detergent, rinse well again, and then hand dry.
Foods that contain oxalic acid extend far beyond rhubarb leaves ... such as buckwheat, star fruit, black pepper, parsley, poppy seed, rhubarb stalks, amaranth, spinach, chard, beets, cocoa, chocolate, most nuts, most berries, beans, asparagus and tea - for starters. And, the human body can actually produce a synthesized oxalic acid from ingestion of mega doses of ascorbic acid (vitamin C) that are in excess of the body's daily dietary needs.
an idea of the toxicity can be found here: OXALIC ACID
it`s the strongest of the organic acids too, but great for getting Rust stains off clothes without affecting the garment!
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