Reverse Osmosis Antiscalants - Scale
Inhibitor
Extonates - 608 Product Data Sheet
General Product Information
Extonates-608 is a multifunctional antiscalant for reverse
osmosis systems, highly effective in preventing silica scale
formation on membrane surfaces.
Besides its excellent silica scale
inhibition properties Extonates-608 is effectively
controlling calcium carbonate, strontium sulfate, barium sulfate,
iron oxide and calcium fluoride scale formation.
Extonates-608 has compatibility approvals from membrane
manufacturers.
All ingredients in Extonates-608 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-608 and
should not be regarded as specification limits for the product. A
product specification is available on request.
-
appearance : clear yellow liquid
-
odor : slight
-
pH : 2.5
-
Boiling point : > 100°C
-
Specific gravity at 20/20 °C :
1.235
-
Flash point : non flammable aqueous
solution
Chemical Reactivity
Extonates-608 is not affected by chlorine or other oxidizing
biocides under normal conditions of use. Extonates-608 should
be injected in membrane systems after chlorine and sodium
metabisulfite treatment. Extonates-608 is not compatible with
residual cationic monomers from the pre-treatment.
Application and dosage level
Extonates-608 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-608 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-608 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-608 is classified as
non-toxic. A Material Safety Data Sheet is available on request.
Regulatory
Extonates-608 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-608 is available in HDPE 220 Liters drums and 25 kg
pales
