The invention alkylphosphonous acid derivative represented by the following formula (I), a A-P (= O) (OX) -H (I) (Wherein, A is, C 2 ~C 18 is optionally substituted with - means an aryl-alkyl, - alkyl, C 2 ~C 18 - alkylene, C 6 ~C 18 - arylalkyl, C 6 ~C 18 and, it is H, optionally substituted, X is, C 1 ~C 18 - alkyl, C 6 ~C 18 - aryl, C 6 ~C 18 - arylalkyl, C 6 ~C 18 - alkylaryl, C 2 Proton / or alkylene, Mg, Ca, Al, Sb, Sn, Ge, Ti, Fe, Zr, Zn, Ce, Bi, Sr, Mn, Cu, Ni, Li, Na, K, and H, - ~C 18 .) which means nitrogen bases and of the adducts from the diester formation olefin, represented b) the following formula (II), [Formula 1](Wherein, represents CO 2 H, CO 2 R 5, R 6 -CO 2 H, and R 6 -CO 2 R 5 2, R 4 R is, and be identical or different, and R 1, R means H, and R 5 and have the same or different 3 or is 1, R 4 R, CO 2 H, CO 2 R 5, R 6 -CO 2 H and are the same or different, refers to R 6 -CO 2 R 5, and means H, and R 5 2, R 3 R is, then, be the same or different or, 2, R 4 R is the same or different and are, And -CO-O-CO -, - CO-S-CO -, - CO-NR 1 -CO -, - means a 1 -CO- CO-PR, and, 1, R 3 R is the same or different or, CO 2 H, CN,CO 2 R 5, R 6 -CO 2 H, R 6 -CO 1,R 2 R is, then, be the same or different means H, and R 5 and, and have refers to 2 R 5, and means H, and R 5 3, R 4 R is, then, be the same or different or, 1, R 2 R is, -CR 2 and then, the same or different and are 3 -CO-O-CO -, - CR 2 3-CO-NR 1 -CO -, - CR 2 3 -CO-O-CO-CR 2 3, -CR 2 3-CO-NR 1 -CO-CR refers to 23, and means H, and R 5 3, R 4 R is, then, be the same or different or, 2, R 4 R is, -CO-CR 5 = CR 5 -CO each - The means, and, 1, R 3 R means H, and R 5 and, and have the same or different are R 5,C 1 ~C 18 - alkyl, C 6 ~C 18 - aryl, C means an alkyl aryl 6 ~C 18 - - aryl alkyl, C 6 ~C 18 - alkylene, C 6 ~C 18 - arylene, C6 ~C 18 - C 2 ~C 18R 6 is, and alkarylene / or C 6 ~C 18 -) means aralkylene regarding the use of it and the method of manufacturing it..本発明は、次式(I)で表されるアルキル亜ホスホン酸誘導体、A-P(=O)(OX
