Multi-Element Calibration Standard-2A Back Catalog number: 50012 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 677750 4-Ethylphenol, 100 µg/ml, Acetonitrile, 1ml Price on request 8484.15-50MG Metoprolol (free base),neat,neat,50mg, Price on request C10574900 Betaine, 100mg Price on request