Australia's Science Forum

If you specifically need a Na3PO4 solution you can easily prepare it from either the monobasic or dibasic phosphate and a relatively concentrated solution of NaOH. For example... if you need a 0.1M solution of Na3PO4 you can dissolve 0.1mole of the NaH2PO4 (12.0g) or Na2HPO4 (14.2g) in 900ml of dist...

Hi remlap12,
This substance is described as "practically insoluble "in water in the entry in the Merck Index 9th Edition.

Hi Folks The UN No. 1477 is a generic classification for " NITRATES,INORGANIC,N.O.S." and is used for DG transport. Some UN Numbers are specific but many are generic. If you want a specific identifier for a substance I suggest you use the CAS No. (Chemical Abstracts Service Registry Number...

Even safer and just as effective - a vitamin c tablet or powder dissolved in a small amount of water and poured on to the stain will do the job with no stress ,toxic solutions or SO2 to breathe. (ascorbic acid is an excellent reducing agent).
.

If I can make a suggestion... For years I have removed silver stains (from silver nitrate) by applying 0.1M Iodine with a tissue or a cloth to the skin or clothing for about a minute then sponging with a 1M soution of sodium thiosulfate. the iodine converts the silver stain into silver iodide and th...