Synthesis of nonionic-anionic colloidal systems based on alkaline and ammonium β-nonylphenol polyethyleneoxy (n = 3-20) propionates/dodecylbenzenesulfonates with prospects for food hygiene

Table 2 The main physico-chemical characteristics of heterogeneously polyethoxylated (n=3, 6, 9, 12, 18) nonylphenols (NF), purified of water, polyethyleneglycols, free nonylphenol

No.	Average oligomerization degree (n)		Molecular weight (M)	Content of ethylene oxide (%)		Hydroxyl number [mg KOH/g heterogeneous polyoxyethylene (PEO) chain monoderivatized NF]		Purity¹⁾ (%)
	Determined	Calculated	Molecular weight (M)	Determined	Calculated	Determined	Calculated	Purity¹⁾ (%)
1	2.99	3	352	37.41	37.50	158.69	159.09	99.75
2	5.99	6	484	54.43	54.54	115.47	115.70	99.80
3	8.96	9	616	64.01	64.29	90.52	90.91	99.57
4	11.96	12	748	70.36	70.59	74.63	74.87	99.68
5	17.95	18	1012	78.05	78.26	55.19	55.34	99.73

Legend: ¹⁾ weighted average value reported simultaneously to the content of ethylene oxide and the hydroxyl number.