Table 1. Aqueous Solubility of α-Gly in the Presence of 1 mol % of Various Additives at 15 °C.

additive	solubility (mol fraction)
no additive	0.0474 ± 0.0010
l-methionine	0.0469 ± 0.0003
L-tryptophan	0.0474 ± 0.0004
iminodiacetic acid	0.0478 ± 0.0001
malonic acid	0.0488 ± 0.0002
salicylic acid	0.0476 ± 0.0006
copper chloride	0.0499 ± 0.0001
iron chloride (tetrahydrate)	0.0475 ± 0.0002
zinc chloride	0.0477 ± 0.0007