Tin-Catalyzed Esterification and Transesterification Reactions: A Review

Table 9

Degree of solubility of typical organotin(IV) catalysts applied in the transesterification reactions [12].

Organotin catalyst	Solubility (g·mL^−1) at 40°C			Solubility (g·mL^−1) at 100°C
	Methyl alcohol	Soybean oil	FAMEs	Methyl alcohol	Soybean oil	FAMEs
dibutyltin dilaurate (DBTDL)	0.02	0.02	Soluble	—	Soluble	Soluble
di-n-butyl-oxo-stannane (DBTO)	Insoluble	Insoluble	<0.01	—	0.10	0.15
Butylstannoic acid (BTA)	Insoluble	Insoluble	<0.01	—	0.03	0.04

^aDetection limit was 0.01 g·mL⁻¹.