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EC number: 236-337-7
CAS number: 13308-51-5
Experimental data on the toxicity of Boron orthophosphate (CAS
13308-51-5) to sediment organisms are not available. However, based on
the results of short-term and long-term aquatic toxicity studies, toxic
effects of the substance on sediment organisms are not expected.
Boron is an essential element for animals, human and plants. Boron
will normally occurs in low concentrations (U.S. EPA 1975), e.g. in
natural freshwater ecosystems, surface water concentrations are usually
less than 0.1 mg/L and concentrations of more than 1 mg/L will be rarely
exceed (United States Department of the Interior 1998). The chemical
form of boron found in water is dictated by pH and other constituents
(Sprague 1972), but in most freshwater systems (pH<9) non-dissociated
boric acid will occur (Hem 1970, Maier and Knight 1991).
Boron is released to the environment slowly in low concentrations
by weathering processes. There are only a few data available quantifying
boron releases from industrial sources. But estimations show, that more
boron will be released by natural weathering to the environment
worldwide than by industrial sources (Butterwick et al. 1989).
Phosphate is the most common form of phosphorus source, which is
an essential nutrient for all life forms, and is the eleventh-most
abundant mineral in the earth's crust. Phosphate itself does not
consider toxic to sediment organisms. However, in the aqueous
environment nutrient enrichment (eutrophication) by the addition of
phosphate can be a problem in some circumstances. In particular
increased phosphate loads to surface waters may be a problem when the
conditions are such that P is a growth-limiting factor. The effects of
eutrophication can range from ecosystem modifications changes in balance
between different species or communities), through to algal blooms and
in extreme cases (through decomposition of plant biomass leading to
oxygen depletion) collapse of the ecological community.
To avoid such effects, limiting phosphate emissions to surface
water via industrial wastewater are regulated in the Council Directive
96/61/EC concerning integrated pollution prevention and control. This
states that phosphates have to be taken into account for fixing emission
limit values for industrial wastewater. In order to meet the
requirements it may be necessary to add a treatment step for phosphate
removal from industrial wastewaters before these waters are released to
the aqueous environment.
Butterwick, L.N. De Oude, and K. Raymond (1989). Safety assessment
of boron I aquatic and terrestrial environments. Ecotoxicol. Environ.
Safety 17: 339-371.
Council Directive 91/271/EEC of 21 May 1991 concerning urban
Hem, J.D. (1970). Study and interpretation of the chemical
characteristics of natural water, 2d ed. U.S. Geological Survey
Water-Supply Paper 1473.
Maier, K.J., and A.W. Knight (1991). The toxicity of waterborne
boron to Daphnia magna and Chironomus decorus and the effects of water
hardness and sulfate on boron toxicity. Arch. Environ. Contam. Toxicol.
Sprague, R.W. (1972) The ecological significance of boron. U.S.
Borax Research Corporation, Anaheim, California. 58p.
United States Department of the Interior (1998) Guidelines for
Interpretation of the Biological Effects of Selected Constituents in
Biota, Water and Sediment. National Irrigation Water Quality Program
Information Report No. 3.
U.S. EPA (United States Environmental Protection Agency). 1975.
Preliminary investigation of effects on the environment of boron,
indium, nickel, selenium, tin, vanadium and their compounds. Vol. 1.
Boron. U.S. Environmental Protection Agency Rep. 56/2- 75-005A. 111pp.
Cited In: Eisler, 1990.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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