ResinTech SIR-300 is a sodium form macroporous chelating weak acid cation resin. SIR-300 has unique chelating functionality and is able to remove divalent transition metals preferentially to alkaline earth metals such as calcium. ResinTech SIR-300 is intended for removal of low to moderate concentrations of heavy metals from waste streams. SIR-300 is supplied in the sodium form, can be special ordered in the hydrogen form (as SIR-300-H), or in the buffered form (as SIR-300 pH ADJ). 


Polymer StructureStyrene/DVB
Polymer TypeMacroporous
Functional GroupIminodiacetic
Physical FormSpherical Beads
Ionic Form (as shipped)Sodium
Total Capacity>1.4 meq/mL (Na Form)
Water Retention50 to 60 percent (Na Form) 
Approximate Shipping Weight        44 lbs/cu.ft. (Na Form)
Screen Size Distribution 16 to 50 (U.S. Mesh)
Maximum Fines Content1 percent (less than 50 Mesh)
Minimum Sphericity95 percent
Uniformity Coefficient1.6 (Approximate)
Resin ColorWhite to tan

All resin/carbon purchases processed via this website will be samples only, packaged in 16oz. plastic jars.
For larger quantities please email

NOTE: Weights reflect an average packout weight over time. Actual weights may vary by +/- 1 lb.

Please allow up to 5 business days from the date of your order for processing. After processing is complete, your order will be shipped out according to the shipping option you chose when ordering. For orders being shipped outside of the USA, please allow 4 weeks due to possible delays through customs.

View Data SheetSDS File

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