CAS 7440-42-8 appears in our catalog under these names: Boron - B @ 1000 µg/g in Hydrocarbon Oil, Boron - B @ 1000 µg/ml in H2O, Boron - B @ 5000 µg/g in Hydrocarbon Oil, Boron AA Standard: B @ 1000 µg/mL in H2O, Boron Isotopic Standard: B @ 100 µg/mL in H2O (Enriched in B-11). Offered by: VHG, GLPBio, Chemat, Thermo Scientific (Alfa Aesar), Sigma-Aldrich. Available pack sizes: 200g, 50ml, 500ml, 100ml, 50g, 250ml, 400g, 100g.