| Year |
Event |
Reference/Notes |
| 1924 |
1st publication on synthesis of OPP |
Catalytic hydrogenation of p- and o-hydroxydiphenyl. Ranedo, J.; Leon, A. 1924. Anales de la Real Sociedad Espanola de Fisica y Quimica 22:222-232. |
| 1931 |
1st publication on biocidal properties of OPP |
Germicidal efficiency of o-phenylphenol against Mycobacterium tuberculosis. Tilley, F. W.; MacDonald, A. D.; Schaffer, J. M. 1931. Journal of Agricultural Research (Washington, D. C.) 42:653-656. |
| 1932 |
Dow awarded patent on method of producing solid OPP |
o-Phenylphenol in flake form. Williams, Wm. H. (Dow Chemical Co.). 1932. US 1847583 |
| 1934 |
Antiseptic properties of OPP reported |
o-Phenylphenol as an antiseptic. Fuller, H. C. 1934. Journal of Industrial and Engineering Chemistry (Washington, D. C.) 26:946. |
| 1938 |
Use of OPP to preserve wood reported |
Hubert, Ernest E. Preservative treatment of millwork. Journal of Industrial and Engineering Chemistry (Washington, D. C.) (1938), 30:1241-50. |
| 1940 |
USE of OPP to preserve citrus fruits reported |
The use of wraps containing o-phenylphenol for citrus fruits. Van der Plank, J. E.; Rattray, J. M.; Van Wyk, G. F. Journal of Pomology and Horticultural Science (1940), 18:135-144. |
| 1948 |
1st OPP-based product registered with the US EPA |
Varley Lemon Scented Non-selective Disinfectant. Registration Number 421-250. James Varley & Sons, LLC Date: 1948 |
| 1948 |
Dow registers 1st OPP-based product with the US EPA |
Dowicide™ 1 Antimicrobial 464-70 The Dow Chemical Company Active 6/10/1948 |
| 1956 |
OPP reported to be effective in treating paper resistant to fungal attack |
Fungicides for products of the paper industry. Yeager, Charles C.; Seith, Robert T. Mosinee Paper Mills Co., Mosinee, WI, Tappi (1956), 39 557-67. |
| 1961 |
OPP patented for use in fuel preservative formulations |
Fuel oil containing antimicrobial agents. Summers, Claude R., Jr. (Gulf Oil Corp.). (1961), US 2975042 |
| 1966 |
Efficacy of OPP as a slime control agent in paper systems reported. |
Slime control. Ameyama, Minoru. Univ. Shizuoka, Japan. Kami Pa Gikyoshi (1966), 20(9), 496-504. |
| 1968 |
Use of OPP in metalworking fluids patented |
Cold rolling lubricant for metals. Lake, Alan W. (Peabody, Henry W., (Industrial) Ltd.). U.S. (1968), US 3390084 |
| 1970 |
Use of OPP in controlling plant diseases patented |
Orthophenylphenol compositions for controlling plant diseases. Gray, Lionel C. N. (Standardised Disinfectants Co. Ltd.). Brit. (1970), GB 1200104. |
| 1974 |
Dow patents disinfectant spray containing OPP |
Disinfectant spray. French, Floyd R.; Paige, Janet E. (Dow Chemical Co.). Ger. Offen. (1974), DE 2401112 |
| 1978 |
Use of OPP to preserve starch slurries patented |
Prevention of the degradation of starch adhesives. Ueno, Ryuzo; Matsuda, Toshio; Fujita, Yatsuka; Hatanaka, Kazunori. (Ueno Fine Chemical Industries, Ltd., Japan). Jpn. Kokai Tokkyo Koho (1978), JP 53145865 |
| 1981 |
Use of OPP in gypsum production patented |
Improving fluidity of gypsum slurry. (Yoshino Gypsum Co., Ltd., Japan; Toho Chemical Industry Co., Ltd.). Jpn. Kokai Tokkyo Koho (1981JP 56078421 |
| 1997 |
Dow patents suspension formulation of OPP |
Suspension formulations of ortho-phenylphenol. Gartner, Charles D. (The Dow Chemical Company, USA). U.S. (1997), US 5629350 |
| 2009 |
Patent application (Dow): OPP (and other actives) in latex paints |
Annis, Ioana; Henning, Mark A.; Quinn, John W. Process for preparing latex paints containing biocides, grind and dispersion phase for latex paints. PCT Int. Appl. (2009), WO 2009073309 A1 |
| 2010 |
Use of OPP and other biocides in microbiocidal coatings – patent application |
Microbiocidal coatings. Collin, Jennifer Reichl; Ghosh, Tirthankar; Zeng, Fanwen. (Rohm and Haas Co., USA). Eur. Pat. Appl. (2010), EP 2161311 |
