Borax decahydrate. sodium tetraborate. disodium tetraborate. sodium borate. we number: 215-540-4. ... price: us $2.99. borax 1 kg sodium tetraborate decahydrateboraks. ... 99.9% na2b4o7·10h2o. main information: borax decahydrate molecular formula: na2b4o7·10h2o Sourcing guide for borax anhydrous: as an online chemical database of china chemicals and chemical suppliers, our website provides the chemical community with the most competitive promotion prices on the market by connecting chemical buyers directly with chemical manufacturers in china. Borax (sodium tetraborate)(na2b4o7.10h2o) get latest price. content of boron as (b) per cent by weight, minimum 10.5. matter insoluble in water per cent by weight, maximum 1.0. ph 9.0-9.5. lead (as pb) per cent by weight,maximum 0.003. There are 68 na2b4o7.10h2o formula borax suppliers, mainly located in asia. the top supplying countries or regions are china, philippines, and south africa, which supply 97%, 1%, and 1% of na2b4o7.10h2o formula borax respectively. na2b4o7.10h2o formula borax products are most popular in south america, southeast asia, and eastern asia.