Spolostan 4L

Identification

Chemical description	Sodium salt of low-molecular condensate of naphthalenesulfonic acid with formaldehyde
INCI name	Sodium Polynaphthalenesulfonate
EC name	Naphthalenesulfonic acid, polymer with formaldehyde, sodium salt
CAS #	9084-06-4
EC #	-

Spolostan 4L is an efficient dispersing agent for textile, rubber and plastic industries, suitable for use in dyeing, preparation and stabilization of dispersions. For its dispersing and levelling effect it is commonly used in the process of dyeing with PES disperse dyes, for levelling of basic dyes on PAN fibres and for levelling of anionic dyes on PAD fibres.

Spolostan 4L may also be applied in agriculture as a dispersing agent of pesticides and insecticides to provide wetting ability of dry powders into dispersible aqueous products, in paper industry to extract tall oil from black liquors, or in leather industry as a dispersant of insoluble tannings.

Physical and chemical properties

appearance at 20°C	dark brown liquid
density at 20°C, g/cm³, c.	1.21
active matter, % wt., min.	34.0
sodium sulfate, % wt., max.	4.0
pH, 3% aqueous solution	6.5 - 8.0