3. SiliaBond® Metal Scavengers Characteristics
SiliaBond® Metal Scavengers are made of SiliaFlash® F60 (40-63 μm, 60 Å, 500 m2/g) and endcapped to avoid non-specific binding (undesirable interactions with the free silanols). Therefore, they present the following characteristics:
- No leaching (chemical stability): no API contamination by the metal scavenger. High selectivity: total recovery of the API.
- Very good metal affinity: efficient for a wide range of metal catalysts.
- Solvent compatibility: can be used in any solvent, aqueous (pH 2 to 12) and organic.
- Fast kinetic: even at room temperature.
- Easily scalable: from mg up to multi-ton scale.
- Thermally and mechanically stable synthesizers.
- Ease of use: no swelling or static charge.
- Flexible formats: amenable to use in SiliaSep™ & SiliaPrep™ Cartridges.
- Cost efficient: low cost per gram of metal scavenged.
- Controlled loading
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SiliaBond® Amine
SiliaBond® Amine (Si-NH2) is an effective scavenger of acid chlorides, sulfonyl chlorides, isocyanates and other electrophiles. Si-NH2 has been shown to be effective metal scavenger and catalyst for Knoevenagel reactions. SiliaBond Amine is also used in chromatography as normal phase sorbent.
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SiliaMetS® Diamine
SiliaMetS® Diamine (Si-DIA) is a proven scavenger for metals and electrophiles. It scavenges acids, acid chlorides, anhydrides, aldehydes, isocyanates, and chloroformates as well as Pb, Ni, and Cd.
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SiliaMetS® Triamine
SiliaMetS® Triamine (SiliaMetS WAX-3, Si-TRI) is effective for scavenging metals such as Pb, Co, Ru and Pd. Our screening studies have shown it to be the preferred scavenger for Pb. It can also be used as a scavenger for acid chlorides, isocyanates and other electrophiles.





