Phosphorous acid
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Phosphorous acid
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CAS No:
10294-56-1
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Formula:
H3O3P
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Chemical Name:
Phosphorous acid
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Synonyms:
Phosphorous acid;858711-57-6
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CAS No:
Description
A white crystalline solid. It is a monobasic acid forming the anion H2PO2- in water. The sodium salt, and hence the acid, can be prepared by heating yellow phosphorus with sodium hydroxide solution. The free acid and its salts are powerful reducing agents.
Characteristics
60.7
-1.5
Phosphorous acid appears as a white or yellow crystalline solid (melting point 70.1 deg C) or a solution of the solid. Density 1.651 g /cm3 . Contact may severely irritate skin, eyes, and mucous membranes. Toxic by ingestion, inhalation and skin absorption.
Safety Information
UN 2834
22-35
1/2-26-36/37/39-45
Xn,C
P260, P264, P270, P280, P301+P312, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P330, P363, P405, P501
H302
Phosphorous acid Use and Manufacturing
Mainly used for urination disorders caused by prostatic hypertrophy. Is a highly selective α1A receptor blocker
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