The Stability of Acid,Basic,and Direct Dyes to Light and Water

Abstract

The stability of twenty different commercial dyes to visible and ultraviolet light has been studied in water. The dyes were selected on the basis of their importance from three major dye classes including: basic, acid and direct. The results are compared to the degradation of two of the dyes in natural sunlight as they would exist in the environment the dyes degraded at least 10 times as fast in artificial light as in sunlight. Some previously identified degradation products of Basic Green 4 were confirmed and a mechanism leading to their formation is proposed.

The over-all results show that most commercial colors are resistant to sunlight and water degradation and that it would take many weeks before appreciable dye degradation occurred in a natural acquatic environment.

Keywords

Commercial dyes (20)basic dyes acid dyes direct dyes. Light (artificial)sunlight water. Visible ultraviolet fading rate Degradation products Basic Green 4 Direct Blue 76 Basic Violet 3 mechanism.

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References

Porter, J.J. State of the Art of Textile Waste Treatment, Water Quality Office, Environmental Protection Agency, Washington, D. C., p 2. 1971.

Anonymous , Activated Sludge Plant for Dyeing Waste Waters, Effluent Water Treatment J. 8, 355 (1968).

Michelsen, D.L. , Research on Treatment of Dye Wastes, Textile Chem. Colorist 1, 179 (1969).

Trotman, E.R. , "Dyeing and Chemical Technology of Textile Fibers," London, Charles Griffin and Co., 1964, p 325.

Noller, C.R. , "Chemistry of Organic Compounds," Philadelphia, W. B. Saunders Co., 1965, p 750.

Iwamoto, K. , Fading of Dyestuffs. I. Photochemical Decomposition of Malachite Green and Crystal Violet, Bull. Chem. Soc. Japan 10, 420-425 (1935); Desai, C.M. and Vaidya, B.K. , Action of Light on Some Organic Colouring Matters. I. J. Indian Chem. Society 31, 261-264 (1954).

Bitzer, D. and Brielmaier, H.J. , Relationship Between Lightfastness and Dye Constitution in Dependence of the Substrate, Melliand Textiberichte 41, 62-64 (1960).

Calvert, J.G. and Pitts, J.N. , Jr., "Photochemistry," New York, Wiley 1966, p 19.

Henriquex, P.C. , Influence of pH on Amino Dyes of Triphenyl Methane and the Decomposition of these Dyes by Light, Rec. Trav. Chim. des Pays-Bas 52, 991 -1000 (1933 ).

10.

McLaren, K. , The Spectral Regions of Daylight which cause Fading. J. Soc. Dyers Colourists 72, 86-99 (1956).

11.

Porter, J.J. and Speares, S.B. , Jr., Textile Chem. Colorist 2, 191-195 (1970).

12.

Noller, C.R. , "Chemistry of Organic Compounds," Philadelphia, W. B. Saunders Co., 1965, p 750.

13.

Trotman, E.R. , "Dyeing and Chemical Technology of Textile Fibers," London, Charles Griffin and Co., 1964, p 335.

14.

Anonymous , Resistance of Dyed Textiles to Daylight, The Resistance of Dyed Textiles to Daylight, Textile Chem. Colorist 1, 252-260 (1969).

15.

Kerr, N. , M.A. Morris and Zeronian, S.H. The Effect of Ozone and Laundering on a Vat Dyed Cotton Fabric, "Non-Competitive" Dyes Do Compete, Amer. Dyestuff Reptr. 58, 34-35 (1969).

16.

Venkataraman, K. , "The Chemistry of Synthetic Dyes," Vol. II, New York , Academic Press, 1952, p. 1221.