A feature unique to this compound is the ability of the phosphinic acid
to more truly mimic the ionized, tetrahedral intermediate of peptide hydrolysis.
Extraction of divalent metals with bis(2,4,4-trimethylpentyl) phosphinic acid
. Solvent Extraction and Ion Exchange, 8: 597-614.
1H-PFAs, 1H-perfluoroa!kanes; PFPA, perfluoroalkyl phosphonic acid; PFPiA, perfluoroalkyl phosphinic acid
 have discovered a flame retardant additive system comprising low glass transition temperature ([T.sub.g]) P-glass, phosphinic acid
salt, zinc salt, and melamine salt, and have reported that it has a combination of improved physical and flame resistance properties.
For example, similar to the case made by the FMC for butyllithium, the sponsor for benzene phosphinic acid
(phenylphosphinic acid) proposed no additional mammalian toxicology testing because existing animal data showed that administration by oral gavage causes gastrointestinal tract bleeding, necrosis, and occasionally perforation, and the corrosive effects of this substance had already been demonstrated as the basis for its toxicity (BPD/BPA Coalition 2003).