Reverse Osmosis Antiscalants - Scale Inhibitor

Extonates - 609 Product Data Sheet

General Product Information
Extonates-609 is a multifunctional antiscalant for reverse osmosis systems, highly effective in controlling barium and strontium sulfate, calcium phosphate and silica scale formation on membrane surfaces. The product is also effectively controlling calcium sulfate scale formation.

Extonates-609 has compatibility approvals from membrane manufacturers.

Physical and Chemical Product Properties
The following are typical properties for Extonates-609 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 : 2.7

• Boiling point : > 100°C

• Specific gravity at 20/20 °C : 1.142

Chemical Reactivity
Extonates-609 is not affected by chlorine or other oxidizing biocides under normal conditions of use. Extonates-609 should be injected in membrane systems after chlorine and sodium metabisulfite treatment. Extonates-609 is not compatible with residual cationic monomers from the pre-treatment.

Application and dosage level
Extonates-609 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-609 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-609 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. Typical dosage rates range between 2-10 ppm.

Recommended operation limits of the most relevant brine water parameters :

• silica : up to 400 ppm max

• LSI : +2 to +2.5

• Soluble Iron : < 0.5 ppm max.

• Aluminum; < 0.5 ppm

• Barium Sulfate: 350 ppm

Dose level projections and optimal system recovery recommendations are available on request.

Health and Safety
From results of acute studies Extonates-609 is classified as non-toxic. A Material Safety Data Sheet is available on request.

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-609 is available in HDPE 240 Kgs drums and 25 kg pales

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