What catalyst do i need to make Sodium Hexametapolyphosphate - "Graham's salt"?

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Offline vitnghesam

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I tried to prepare this compound from NaH2PO4 but the quality is too low.I heard that there's smthing added as a catalyst. I need the technology protocol also.
Please help me asap.
Thanks in advance

Mod edit - formatted the subject as a question.  Please try to do this to help keep the forum tidy and easy to navigate - thanks!
« Last Edit: 31/07/2008 11:43:24 by BenV »