Diphenyl (4′-(Aryldiazenyl)biphenyl-4-ylamino)(pyridin-3-yl)methylphosphonates as Azo Disperse Dyes for Dyeing Polyester Fabrics

Table 1

Fastness properties of dyes 3–8.

Compound	Washing	Perspiration		Rubbing		Sublimation		Light (40 h)
		Acid	Alkali	Dry	Wet	Alt	St
3	5	4	5	4	5	5	4	7
4	5	5	4	5	4	5	4	6
5	4	5	5	5	4	5	5	5
6	5	5	4	4	4	4	5	6
7	5	4	5	4	5	4	4	5
8	5	5	5	5	5	5	5	6

Alt: alteration, St: staining, rate for light fastness: 5–8 (acceptable), 1–4 (not acceptable); rate for different fastness: 4-5 (acceptable), 1–3 (not acceptable).