Table 2.

Distribution of molecular weight in PHMG ¹.

Name of HD 2 Brand	Number of Samples 3	Molecular Weight (MW, g/mol), %
		400–500	500–600	600–700	700–800	800–900	900–1000	>1000	Total
SKYBIO 1125 4	2	7.36	4.57	18.64	37.74	24.89	6.01	0.82	100
Oxy	7	18.40	8.92	25.40	34.65	6.78	5.36	0.50	100
Clean Land	1	53.32	29.05	11.02	6.62	0.00	0.00	0.00	100
Vegetable Home Cleanup	10	33.41	16.90	26.70	19.03	1.24	2.65	0.07	100
Cefu	6	24.09	11.50	26.01	32.32	2.20	3.63	0.24	100
Atorganic	4	52.46	7.80	21.47	18.27	0.00	0.00	0.00	100
Oxy Saksak	90	33.93	18.42	14.50	22.73	7.54	1.95	0.93	100
Lotte Wiselect	12	22.06	19.16	14.43	29.64	13.54	0.85	0.33	100
Homeplus	9	24.76	16.89	15.50	25.62	9.78	4.61	2.84	100
Total (average)	141	29.98	14.80	19.30	25.18	7.33	2.78	0.64	100

¹ PHMG: polyhexamethylene guanidine. ² HD: humidifier disinfectant. ³ Imbalance in number (Table 1) and distribution of MW among HD brands. ⁴ An antimicrobial product containing 25% PHMG.