https://www.sigmaaldrich.com/US/en/product/aldrich/480886
Aldrich-480886; Sodium borohydride granular, 99.99% trace metals basis; CAS No.: 16940-66-2; Synonyms: Sodium tetrahydridoborate; Linear Formula: NaBH4;...
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https://www.chemnet.com/United-StatesSuppliers/29289/Sodium-Borohydride--892502.html
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