Comparing E339 - Sodium phosphates vs E451II - Pentapotassium triphosphate
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Popular questions
How are sodium phosphates made?
They’re produced by neutralizing food‑grade phosphoric acid with sodium hydroxide, carbonate, or bicarbonate to the desired ratio to yield mono-, di-, or trisodium phosphate, then crystallizing (often as hydrates); condensed polyphosphates are made by dehydrating/condensing orthophosphates at elevated temperatures.
How do saline enema sodium phosphates work?
They act as hyperosmotic salts that draw water into the colon, increasing volume and stimulating peristalsis to trigger a bowel movement; improper use can cause fluid and electrolyte imbalances, so they should be used only as directed.
How does sodium aluminate react with phosphates?
In water, sodium aluminate hydrolyzes to Al(OH)3, which binds phosphate and precipitates it as insoluble aluminum phosphate (AlPO4), especially near neutral pH—this is the basis for phosphate removal in water treatment.
How many meq of sodium does sodium phosphates have?
It depends on the specific salt and hydration: anhydrous NaH2PO4 ≈8.3 mEq Na per gram, Na2HPO4 ≈14.1 mEq/g, and Na3PO4 ≈18.3 mEq/g (hydrates contain less per gram); a typical adult sodium phosphate enema contains about 190 mEq of sodium.
How many sodium phosphates are there?
There are three main orthophosphate salts used in foods—monosodium, disodium, and trisodium phosphate—listed as E339(i–iii), plus various hydrates and condensed (polyphosphate) forms.
What is the refractive index of ktpp?
There isn’t a single published refractive index for solid pentapotassium triphosphate; food-grade specs don’t list it. For aqueous solutions, refractive index depends on concentration and temperature, so you’d need to measure nD under your specific conditions.
What is the refractive index of potassium triphosphate?
A fixed refractive index isn’t typically reported for the solid; it’s not a standard QC parameter for this additive. In solution, the refractive index increases with concentration and varies with temperature and wavelength, so measure it for your formulation.
What is the refractive index of potassium tripolyphosphate?
No standard single value is published for the solid; specifications for E451ii don’t include refractive index. For practical purposes, determine nD on your specific potassium tripolyphosphate solution at the required concentration and temperature.