Inorganic Phosphorus Compounds

Mixtures of Na2HP04/KH2P04 can be used in the treatment of hypophosphataemia (phosphorus deficiency). The varied nature of diets in Western countries prevents the occurrence of hypophosphataemia which is quite rare in humans. An excess of P in the diet, however, may lead to a reduced absorption of other essential trace elanents and hence a deficiency of them (Chapter 11.2). Phosphate salts make the urine more acidic and prevent the deposition of calcium salts as urinary stones. 

Dicalcium phosphate dihydrate, CaHP04 2H2O, with the correct particle size distribution, is particularly useful as a diluent ( 30%) and stabiliser in the preparation of pharmaceutical tablets by 

During the nineteenth century, the toxicity of arsenic Mid its compounds was more widely rect nised than that of phosphorus. Arsenic compounds were used in horticulture, in pigments, and in other products moreover, they were more easily accessed by the general public than they are today. Arsenic compounds were favourites with murderers (both in reality and in fiction ). Cases of deliberate poisoning using white phosphmis, although notable, have been comparatively few. 

Tha Most Powerful Brain and Nerve Tonio known. 

I tho long-felt want of a Safe and Reliable Solution of I Phosphorus. It is very pleasant to the taste, and may be I taken by the most delicately-constituted. II thoroughly re-vitalizes the human frame, and 

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Zeiss, W., Endrass, W., Pointner, A. Illrd. Symp. on Inorganic Phosphorus Compounds, Halle 1979, abstracts p. 133, and Zeiss, W. personal communication... 

Many thousands of phosphorus compounds have been described as having flame-retardant utility. The compounds demonstrating commercial utility arc much more limited in number. They include inorganic phosphorus compounds [red phosphorus, ammonium phosphates. insoluble ammonium polyphosphate, phosphoric acid-bascd systems for cellulosics). additive organic phosphorus flstme retardants... 

EPA. 1989. Summary review of health effects associated with elemental and inorganic phosphorus compounds Health issue assessment. EPA 500/8-89/072. Washington,DC Office of Health and Environmental Assessment, U.S. Environmental Protection Agency. 

References for Chapter 1.5.1 Phosphorus and Inorganic Phosphorus Compounds... 

Diphosphonates form stable Tc(IV) complexes. Contrary to inorganic phosphorus compounds, which are degraded in vivo, the organically bound diphosphonate complexes show high in vivo stability (Davis and Jones 1976). 

Carman, R., Ediund, G. and Damberg, C. (2000) Distribution of organic and inorganic phosphorus compounds in marine and lacustrine sediments a P NMR study. Chemical Geology 163, 101-114. 

Dick, W.A. and Tabatabai, M.A. (1978) Hydrolysis of organic and inorganic phosphorus compounds added to soils. Geoderma 21,1 75-182. 

Inorganic phosphorus compounds are also used as flame-retardants. Elemental red phosphorus itself is applied, for example, in polyurethane foams and more recently in polyamides. Some marketed types of red phosphorus-based flame-retardants are collected in Table 5.6. 

Inorganic phosphorus compounds appointed for flame-retardants ... 

The twentieth-century expansion of all phosphorus chemistry was enormous and it was paralleled by a great increase in both the diversity and volume of application of manufactured phosphorus compounds. Among these applications, however, a handful of simple inorganic phosphorus compounds have remained commercially the most prominent. These were in the fields of fertilizers, detergents and metal treatment. 

Other disadvantages of phosphorus-based FRs include the health hazards of some of the organic varieties (this affects those involved in processing rather than end users) and their tendency to release toxic combustion products during a fire. Inorganic phosphorus compounds absorb moisture, and can suffer from a lack of permanency. 

Inorganic phosphorus compounds are described in the section, commercial Phosphorus-Based Flame Retardants. 

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