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Posts to:
United Kingdom

Details about  1kg Borax (Sodium Tetraborate) decahydrate - fine powder

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1kg Borax (Sodium Tetraborate) decahydrate - fine powder
Item Ended
Item condition:
30 Apr, 2013 10:22:31 BST
£3.50 Economy Delivery | See details
Item location:
United Kingdom, United Kingdom


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Seller assumes all responsibility for this listing.
Last updated on  22 Apr, 2013 08:28:43 BST  View all revisions
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Borax 1kg - Fine white powder supplied in a HDPE Bottle.

  Molecular formula: Na2B4O7 10H2O

Uses - Play Slime (science experiment) - When a borax-water solution is mixed with PVA (Polyvinyl alcohol not PVA glue), a rubbery precipitate is formed which is the result of cross-linking in the polymer. This can be coloured a vibrant yellow/green with disodium fluorescein (both PVA and fluorescein are available in our shop)

Flux - A mixture of borax and ammonium chloride is used as a flux when welding iron and steel. It lowers the melting point of the unwanted iron oxide (scale), allowing it to run off. Borax is also used mixed with water as a flux when soldering jewelry metals such as gold or silver. It allows the molten solder to flow evenly over the joint in question. Borax is also a good flux for 'pre-tinning' tungsten with zinc - making the tungsten soft-solderable.

Buffer - Sodium borate is used in biochemical and chemical laboratories to make buffers, e.g. for gel electrophoresis of DNA, such as TBE or the newer SB buffer or BBS (borate buffered saline) in coating procedures. Borate buffers (usually at pH 8) are also used as preferential equilibration solution in DMP-based cross linking reactions.

Co-complexing - Borax as a source of borate has been used to take advantage of the co-complexing ability of borate with other agents in water to form complex ions with various substances. Borate and a suitable polymer bed are used to chromatograph non-glycosylated hemoglobin differentially from glycosylated hemoglobin (chiefly HbA1c), which is an indicator of long term hyperglycemia in diabetes mellitus. Borate and a proprietary synthetic amino acid, Deselex (from Henkel) have been used to complex water "hardness" cations to make a non-precipitating water "softener". Borate alone does not have a high affinity for "hardness" cations, although it has been used for that purpose.

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  Combined postage - We combine postage and packaging whenever this reduces the shipping cost. We make no profit on postage and only charge what it costs us.
  Maximum combined cost - For UK orders we offer an express service for up to 25kg (including packaging) for £8.99. This offer excludes highlands and islands, if you are from these regions please contact us for a shipping quotation.
  Delivery times - Typically standard delivery takes 2 - 5 working days. Express delivery typically takes 2 working days.
  Combined postage - We combine postage and packaging whenever this reduces the shipping cost. We make no profit on postage and only charge what it costs us.
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  Despatch Times - We despatch once per day Monday to Friday only (excluding bank holidays). Orders received before 17:30 GMT will be despatched the following morning. If your order is extremely urgent please contact us for priority handling.
  Returns - We operate a 7 day no quibble money back guarantee. In the event that you no longer want the item, contact us for a returns number and simply return the item in the condition it arrived to you, we will then refund the cost of the item but not the postage. In the event that your item is damaged in transit contact us immediately and we will organise a replacement or a refund on receipt of the damaged item.
  Product Suitability - It is up to the purchaser to ensure that the product is suitable for purpose. We can't be held responsible for inappropriate storage or use of our products. Please ensure that you familiarise yourself with any safety precautions required for handling and use. All products are labeled to current regulatory requirements. MSDS sheets are available upon request.

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Paramount Elements

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