| http://www.w3.org/ns/prov#value | - te, tributyl phosphite, trisdodecyl phosphite, trisnonyldecyl phosphite, diphenyl phosphite and triphenyl phosphite as well as a metal salt such as a lithium, sodium or potassium salt, thereof. [0049] Among them, from the viewpoint of further suppressing elution of antimony, a pentavalent phosphorus compound such as an ester of orthophosphoric acid, such as ethyl acid phosphate, or a trivalent pho
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