Pigment Red 635

International index number: PR57:1

Chemical structure: monoazo calcium salt

Product features: high tinting strength and very deep blue red pigment. It has excellent dispersibility and low cost advantages, so it is widely used in carpets/fibers, tapes and polyolefin films where fastness is not too critical.

Product Information

Chemical Type Monoazo Ca-lake CAS NO. 5281-04-9 C. I. Name Pigment Red 57:1 EINECS / ELINCS NO. 226-109-5 C. I. Constitution No. 15850:1 Physical Appearance Red powder

Light fastness: The fastness to light be determined on injection molded plastic swatches of approximately 2 mm thickness. Test swatches exposed in QUV and the visual rating given on 1 to 8 Blue Wool scale where 1 = ‘Poor’ and 8 = ‘Excellent’.

Weather fastness: The fastness to weather is determined on injection molded plastic swatches of approximately 2 mm thickness. Test swatches exposed in Xenon Arc for 1000 hrs and the visual rating given on 1 to 5 Grey scale where 1 = ‘Poor’ and 5 = ‘Excellent’.

Heat stability: The Heat stability indicated is the maximum temperature in ˚C at which a change of color (DE ≤ 3) occurs after a dwell time of 5 minutes in the barrel of an injection molding machine as per DIN EN 12877-1.

Oil absorption: The oil absorption was determined on the basis of EN ISO 787-5 and given in g linseed oil per 100 gm. pigment.

Bleeding fastness: The fastness to bleeding in PVC-P is determined on a colored PVC film in contact with a white-pigmented PVC film in an oven at 140˚C for 2 hrs and the visual rating given on 1 to 5 Grey scale where 1 = ‘Poor’ and 5 = ‘Excellent’.

The above information is for guidance only and to the best of our knowledge it is accurate and reliable. However, as use conditions are not within our control, no guarantees are given or are to be inferred. Test methods used to generate this data can be provided on request.

Physical Properties