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Phosphorus acid is used as an intermediate in the preparation of other phosphorus compounds like potassium phosphite, ammonium phosphite and calcium phosphite. It is actively involved in the preparation of phosphites like aminotris(methylenephosphonic acid) (ATMP), 1-hydroxyethane 1,1-diphosphonic acid (HEDP) and 2-phosphonobutane-1,2,4-tricarboxylic Acid (PBTC), which find application in water treatment as a scale or corrosive inhibitor. It is also used in chemical reactions as a reducing agent. Its salt, lead phosphite is used as PVC stabilizer. It is also used as precursor in the preparation of phosphine as well as an intermediate in the preparation of other phosphorus compounds.
Prokop, M.; Bystron, T.; Bouzek, K. Electrochemistry of phosphorus and Hypophosphorus Acid on a Pt electrode. Electrochim. Acta 2015, 160, 214-218.
Grun, A.; Kovacs, R.; Illes Nagy, D.; Garadnay, S.; Greiner, I.; Keglevich, G. Efficient Synthesis of Benzidronate Applying of Phosphorus Trichloride and phosphorus Acid. Lett Drug Des Discov 2015, 12 (1), 78-84.
Dichiarazioni di rischio (UE): H302-H314-H318
Harmful if swallowed. Causes severe skin burns and eye damage. Causes serious eye damage.
Dichiarazioni precauzionali: P260u-P201-P280i-P304+P340-P405-P501a
Obtain special instructions before use. Wear eye/face protection. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.