For further processing only.
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Kryptofix 221 material number and pack size: Material Number Pack Size 11183958103 custom fill
- Cryptant that binds cations in aqueous solutions
- Use Kryptofix 221 in enzymatic tests for potassium to decrease the sodium concentration relative to potassium.
Molecular weight: 332.44 D Appearance: Clear, yellow liquid
Solubility: Clear yellowish solution in water (c=4 mg/mL)
A340 (aqueous solution): ≤0.100
A405 (aqueous solution): ≤0.060
Identity (NIR): Corresponds to reference
13C-NMR spectrum: Corresponds to masterlot
Kryptofix 221 agent (HPLC; based on masterlot): ≥75%
Na (AES): ≤65 ppm
K (AES): ≤5 ppm
NH3 (evolution in buffer; after 10 days at +55°C): ≤50 μmol/L
Stability: At +2 to +8°C within specification range for 12 months. Keep under nitrogen. Protect from light.