Variation in ph values of saturated solution of organic materials using a given solvent affects its quality. For example, inclusion-free, transparent, bulk size single crystals.
pH manipulates solubility of compound with acidic or basic nature, hence it can affect the crystals characteristics.
for more comprehensive information please check the attachment and the flowing link.
http://pubs.acs.org/doi/pdf/10.1021/cg4001939
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