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HP RED 2690 / PIGMENT RED 3

Pigment Red 3

Toluidine Red shows insufficient fastness towards solvents; in fact, it is partially inferior even to monoazo yellow pigments, which is also true for other members of this class. Its stability to alcohols, aliphatic and aromatic hydrocarbons, and dibutyl phthalate equals step 3 on the 5 step scale; P.R.3 is even less fast to esters and ketones.

P.R.3 is used primarily in air drying paints. Its hue varies considerably with the particle size, therefore pigment manufacturers usually offer a range of brands. The products with coarser particle sizes are bluer. Very bluish varieties, however, partially contain chemically modified P.R.3. Full shades of Toluidine Red are extremely lightfast and weatherfast, but deteriorate rapidly as the pigment is reduced with white pigment.

P.R.3 application in printing inks is restricted; the pigments are being displaced by their stronger Naphthol AS pigment counterparts. P.R.3 is used primarily in flexo printing.

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HP RED   2690

C.I.PR3
Chemical   Composition:                    
Color   Index: Pigment   Red 3
C.I.NO.: 12120   PIGMENT RED 3
Chemical Formula:          C17H13N3O3
CAS NO.:                   2425-85-6
EU NO.:                    219-372-2
Physical Properties:                       
Physical   Form :             Red   Powder                 
Heat Resistance(º C):           160
Density (g/cm3):       1.34-1.52
Specific Surface(㎡/g): 8~25
PH Value:                  6.0-7.5
Oil Absorption(ml/100g):      45-60
Fastness   Properties:                       Full Color Tint Color
Dispersibility:              Excellent                     Excellent                    
Light Fastness:             5 4
Acid Resistance:            4 3
Alkali Resistance:           4 3
Weather Fastness:        4 3
Water Resistance: 5 4
Oil Resistance: 4~5 4


Recommended Applicationcoatings: Air drying paints

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