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 4 The main physico-chemical characteristics of β-nonylphenoxy (NF) polyethyleneoxy (n=3, 6, 9, 12, 16, 20) propionic acids [NF(EO) _n -PC)]

No.	Average oligomerization degree (n)	Content of ethylene oxide (%)		Acid number (mg KOH/g product)		Purity (%)
No.	Average oligomerization degree (n)	Determined^*)	Calculated	Determined	Calculated	Determined^**)
1	3	30,84	31,13	132,08	132,08	99,08
2	6	47,16	47,48	100,04	100,72	99,33
3	9	57,09	57,56	80,73	81,39	99,19
4	12	64,05	64,39	67,93	68,29	99,47
5	16	70,92	70,37	55,14	55,98	99,36
6	20	73,99	74,81	47,82	47,60	99,28

Legend: ^*) cleavage with hydriodic acid (d = 1.7-1.9); ^**) weighted average value reported simultaneously to the determined content of ethylene oxide and nitrogen.

ISSN: 2661-801X