Comparing E923 - ammonium persulfate vs E919 - Nitrosyl chloride
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Popular questions
What is ammonium persulfate used for?
As E923, it has been used as a flour treatment/bleaching agent, though its authorization for food use is limited and varies by country (not permitted in the EU/UK). Outside food, it’s a strong oxidizing initiator used in polymerization, etching, and hair-bleaching products.
What products contain ammonium persulfate?
You may rarely find it in some flours where permitted, labeled as ammonium persulfate or E923; many regions no longer allow it in food. It’s more commonly present in hair-bleach powders, lab reagents (e.g., gel electrophoresis), and PCB etchants.
5. what aspects of your experiment are controlled by temed and ammonium persulfate?
TEMED and ammonium persulfate generate free radicals to initiate and control the rate of acrylamide polymerization, which affects gelation time and pore size/uniformity in gels. Handle both with care—they are irritants and strong oxidizers.
Ammonium persulfate how to make solution?
For food use, consumers should not be preparing solutions of E923; its food authorization is limited. In labs it’s typically dissolved freshly in water because it decomposes—follow your protocol and the SDS for concentrations and safety.
Ammonium persulfate how to make solution cu?
Copper etching with ammonium persulfate is an electronics application, not a food use; follow the product manufacturer’s instructions for concentration and temperature and observe oxidizer safety. Food use of E923 is restricted and not permitted in the EU/UK.
Is nitrosyl chloride polar?
Yes—NOCl is a polar molecule due to its bent geometry at nitrogen and the differing electronegativities of O and Cl, which produce a net dipole.
(b) in which species (no2cl or no3-) are the n-o bond(s) longer? nitrosyl chloride nitrate ion?
Longer in nitrate (NO3−): its N–O bonds have lower bond order (~1.33) than the N=O double bond in nitrosyl chloride, so they are longer.
How is nitrosyl chloride used?
As the additive E919 it was historically used as a flour treatment/bleaching agent, but this use is now largely discontinued and not authorized in the EU; today it is mainly an industrial chlorinating/nitrosating reagent rather than a common food additive.
Nitrosyl chloride nocl decomposes to nitric oxide and chlorine when heated answer l?
Yes—on heating, 2 NOCl → 2 NO + Cl2, and the decomposition is promoted by heat and light.
Question 6 what is the "axe" description of the nitrosyl chloride molecule?
AX2E1 at the nitrogen center (two bonded atoms and one lone pair), giving trigonal planar electron geometry and a bent molecular shape.