ResinTech SIR-100-HP is a chloride form macroporous nitrate selective strong base anion resin. SIR-100-HP has a unique functionality that increases selectivity for nitrate and decreases selectivity for sulfate. This results in higher operating capacity, lower leakage, and freedom from nitrate dumping if operated past sulfate break. SIR-100-HP is intended for all nitrate removal applications, and can also be used to remove perchlorate. SIR-100-HP is supplied in the chloride form.