No. of entries	Average concentration (% v/v)	Rate (M −1 s−1)†
Organic precipitants (2503 samples)
PEG 4K	710	21.1	∼3 × 109
PEG 8K	488	18.1	"
PEG 3.5K	296	20.5	"
PEG 6K	212	16.8	"
MPD	193	38.6	∼6 × 108
PEG 400	142	25.7	∼3 × 109
PEG-MME 2000	65	22.7	"
PEG-MME 5000	63	20.0	"
PEG 1000	57	19.8	"
2-Propanol	48	18.0	2.0 × 109
PEG 2000	45	22.3	∼3 × 109
Ethylene glycol	43	20.5	2.4 × 109
Ethanol	43	28.8	2.0 × 109
PEG 10K	32	22.0	∼3 × 109