Immobilized Candida antarctica lipase B
CAS No.
Synonyms
Molecular formula
Molecular weight
Not specified in the supplied record.
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Chemical Product Description & Applications
Immobilized Candida antarctica lipase B is a heterogeneous biocatalyst used for ester-bond transformations. It catalyzes esterification, transesterification and hydrolysis, with reaction direction influenced by water availability and the substrates. Its selectivity can also be used to discriminate between suitable enantiomeric alcohols or esters.
The selected material is CALB attached to a solid carrier, rather than an unspecified soluble lipase powder. Immobilization allows the catalyst particles to be separated from the reaction mixture and can support reuse where activity is retained. The carrier is not the active enzyme itself, and solvent compatibility or diffusion can influence the observed reaction. This form is particularly relevant to synthesis involving poorly water-soluble organic substrates.
Typical Applications
- Specialty ester synthesis: Used to catalyze esterification or transesterification when preparing suitable flavor, fragrance, lubricant-related or other specialty ester structures.
- Chiral intermediate resolution: Used in appropriate kinetic-resolution processes where selective acylation or hydrolysis separates the behavior of two enantiomers.
- Structured lipid and glyceride chemistry: Used in compatible enzymatic acyl-transfer processes to modify ester distribution in suitable oil-derived substrates.
Specifications
| Parameter | Specification | Test Method |
|---|---|---|
| Appearance | Cream to tan powder | Visual inspection |
| Identification | Protein fingerprint and stated enzyme activity match reference | Protein electrophoresis plus substrate activity assay |
| Enzyme activity | ≥20000 U/g | Olive-oil hydrolysis at pH 7.5, 37 C; 1 U releases 1 micromole fatty acid/min |
| Loss on drying | ≤8.0% w/w | Vacuum-oven gravimetry |
| Lead | ≤5 mg/kg | ICP-MS after digestion |
| Salmonella | Absent in 25 g | Enrichment and culture confirmation |
Specifications describe the standard grade. Tolerance, test method and documentation package are confirmed per order.
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