Reverse Osmosis Antiscalants - Scale
Inhibitor
Extonates - 501 Product Data Sheet
General Product Information
Extonates-501 is a multifunctional antiscalant for reverse
osmosis systems, highly effective in preventing calcium carbonate
scale formation on membrane surfaces.
Besides its excellent calcium
carbonate scale inhibition properties Extonates-501 is
effectively controlling calcium sulfate, calcium fluoride and metal
oxides scale formation.
Extonates-501 has compatibility approvals from membrane
manufacturers.
All ingredients in Extonates-501 are certified to ANSI/NSF
Standard 60 for use in reverse osmosis systems producing potable
water.
Physical and Chemical Product Properties
The following are typical properties for Extonates-501 and
should not be regarded as specification limits for the product. A
product specification is available on request.
-
appearance : clear yellow liquid
-
odor : odorless
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pH : 3.3
-
Boiling point : > 100°C
-
Specific gravity at 20/20 °C :
1.220
-
Flash point : non flammable aqueous
solution
Chemical Reactivity
Extonates-501 is not affected by chlorine or other oxidizing
biocides under normal conditions of use. Extonates-501 should
be injected in membrane systems after chlorine and sodium
metabisulfite treatment. Extonates-501 is not compatible with
residual cationic monomers from the pre-treatment.
Application and dosage level
Extonates-501 an aqueous solution of organic acids and is
corrosive in its concentrated form. Corrosion resistant dosing
equipment must therefore be used. Examples of suitable materials are
PVC, glass reinforced plastic or HDPE.
Recommended injection point is into the feedwater downstream of any
filtration equipment and cartridge filters.
Extonates-501 is miscible with water in all proportions. It
may be applied as the neat product, or as a solution in permeate
water. A minimum dosing solution strength of 10% w/w is recommended.
Extonates-501 should be dosed continuously, and
proportionately to the feed water flow, to maintain the recommended
dosage level.
The dosage level required is dependent on the quality of the feed
water and the saturation indices of the various scale forming
species present in the concentrated brine.
Recommended operation limits of the most relevant brine water
parameters :
Dose level projections and optimal
system recovery recommendations are available on request.
Health and Safety
From results of acute studies Extonates-501 is classified as
non-toxic. A Material Safety Data Sheet is available on request.
Regulatory
Extonates-501 is certified to ANSI/NSF Standard 60 for use in
reverse osmosis systems producing potable water.
Toxicology Data
Acute oral LD50 (rats) > 2000 mg/kg
Eye irritation (rabbits) irritant (EEC guidelines)
Skin irritation (rabbits) non-irritant (EEC guidelines)
Ecological Data
96-hr LC50 (rainbow trout) > 100 mg/l
Logistics
Classification:
-
Corrosive for conveyance
-
Irritant for supply
Packaging:
Extonates-501 is available in HDPE 250 kg drums and 25 kg pales
