From this listing you can purchase a 50g of reagent grade sodium tetrahydroborate

Sodium tetrahydroborate is a versatile reducing agent that finds wide application in various fields.
It is an odorless white microcrystalline powder which often forms lumps when exposed to humidity. It is soluble in water, without decomposition, however it reacts vigorously with acid solutions.

• Ground shipping only
• Please always make sure your shipping address is correct and complete!
• All items are shipped within 2 WORKING days from payment (Saturday is not a working day, also beware of timezones and local holidays).
• Once shipped your purchase will be flagged as such in your "My ebay" page. Please note: There may be a 24-48h gap from when your purchase is actually shipped and when it is flagged as shipped.

If you have questions regarding any item, please feel free to contact me via email. I will try to answers all questions within 1 day.
If you don’t hear from me, please check your spam blocker and send me another email.