CAS 7439-94-3 appears in our catalog under these names: Lutetium Standard: Lu @ 10 µg/mL in 2% HNO3, Lutetium Standard: Lu @ 1000 µg/mL in 5% HNO3, Lutetium Standard: Lu @ 10000 µg/mL in 5% HNO3, Lutetium rod, 6·35mm (0·25in) dia, 99·9% (metals basis excluding Ta), Ta typically 2%, Lutetium Powder/ 99.9% (REO). Offered by: VHG, GLPBio, Chemat, Thermo Scientific (Alfa Aesar), Sigma-Aldrich. Available pack sizes: 100ml, 500ml, 250ml, 1ea, 2g, 5g, 25X50mm, 1g.