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 potassium nitrate to be purified. Put 500 ml of water in the 2 litre pot.

Propionic acid (PA) is used as a preservative in foods such as cheeses, 

Potassium metabisulfite, K2S2O5, also known as potassium pyrosulfite, is a white crystalline powder with a pungent odour.

Potassium fluoride is the chemical compound with the formula KF.

Drospirenone and ethinyl estradiol combination is used to prevent pregnancy.

Quinine sulfate dihydrate (QNS), IUPAC name: (8S,9R)-6-methoxy-4-quinolenyl-5-vinyl-2-quinuclidinyl methanol sulfate dihydrate, was tested

Phenyl chloroformate appears as a colorless liquid with a strong odor. Toxic by ingestion, inhalation and skin absorption.

Hydroxyacetophenones are conveniently converted into the corresponding 1,3- dioxolanes by treatment 

Phthalic anhydride is widely used worldwide for an extremely broad range of applications spanning from the plastics industry to t

Polyvinyl alcohol (PVOH, PVA, or PVAl) is a synthetic polymer which is both colourless, odourless and water-soluble.

It is obtained as a byproduct of wine manufacture during the fermentation process.

Propyl 4-hydroxybenzoate (PHB), is a p-hydroxybenzoate derivative.