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Chemical Industry

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Adapted from 3rd edition, Encyclopaedia of Occupational Health and Safety.

The business of the chemical industry is to change the chemical structure of natural materials in order to derive products of value to other industries or in daily life. Chemicals are produced from these raw materials-principally minerals, metals and hydrocarbons-in a series of processing steps. Further treatment, such as mixing and blending, is often required to convert them into end-products (e.g., paints, adhesives, medicines and cosmetics). Thus the chemical industry covers a much wider field than what is usually called “chemicals” since it also includes such products as artificial fibres, resins, soaps, paints, photographic films and more.

Chemicals fall into two main classes: organic and inorganic. Organic chemicals have a basic structure of carbon atoms, combined with hydrogen and other elements. Oil and gas are today the source of 90% of world organic chemical production, having largely replaced coal and vegetable and animal matter, the earlier raw materials. Inorganic chemicals are derived chiefly from mineral sources. Examples are sulphur, which is mined as such or extracted from ores, and chlorine, which is made from common salt.

The products of the chemical industry can be broadly divided into three groups, which correspond to the principal steps in manufacture: base chemicals (organic and inorganic) are normally manufactured on a large scale and are normally converted to other chemicals; intermediates are derived from base chemicals. Most intermediates require further processing in the chemical industry, but some, such as solvents, are used as they are; finished chemical products are made by further chemical processing. Some of these (drugs, cosmetics, soaps) are consumed as such; others, such as fibres, plastics, dyes and pigments, are processed still further.

The main sectors of the chemical industry are as follows:

  1. basic inorganics: acids, alkalis and salts, mainly used elsewhere in industry and industrial gases, such as oxygen, nitrogen and acetylene
  2. basic organics: feedstocks for plastics, resins, synthetic rubbers, and synthetic fibres; solvents and detergent raw materials; dyestuffs and pigments
  3. fertilizers and pesticides (including herbicides, fungicides and insecticides)
  4. plastics, resins, synthetic rubbers, cellulosic and synthetic fibres
  5. pharmaceuticals (drugs and medicines)
  6. paints, varnishes and lacquers
  7. soaps, detergents, cleaning preparations, perfumes, cosmetics and other toiletries
  8. miscellaneous chemicals, such as polishes, explosives, adhesives, inks, photographic film and chemicals


In the International Standard Industrial Classification of All Economic Activities (ISIC) system, used by the United Nations to classify economic activity into ten major divisions, the chemical industry is classified as Division 35, one of the nine subdivisions of Major Division 3: Manufacturing. Division 35 is further subdivided into industrial chemicals (351), other chemicals (352), petroleum refineries (353), miscellaneous coal and petroleum products, e.g., asphalt (354), rubber products including tyres (355) and plastics processing (356).

In reporting chemical industry statistics each country normally uses its own classification system, and this can be misleading. Thus comparison between countries of total chemical industry performance cannot be based on national sources. However, international bodies like the Organization for Economic Cooperation and Development (OECD) and the United Nations normally supply data on the ISIC basis, though with a delay of about two years.

Trade statistics are published internationally under the Standard International Trade Classification (SITC), which differs from the ISIC system. Trade statistics by individual countries nearly always refer to SITC section 5, which covers about 90% of total chemicals reported in the ISIC system.

The chemical industry has grown much more rapidly in the half century than industry as a whole. Although there was an economic depression in the world’s chemical industry in the early 1990s, chemical production increased in the mid-1990s. The biggest area of growth of chemical production has been in Southeast Asia. Figure 1 shows the percentage change in chemical production for 1992-95 for selected countries.

Figure 1.Change in chemical production for selected countries, 1992-95


Much of the chemical industry is highly capital-intensive and is also strongly dependent on research and development (e.g., pharmaceuticals). The combined result of these two factors is that the industry employs an abnormally low number of unskilled manual workers for its size, in comparison with manufacturing industry in general. Total employment in the industry rose slightly during the period of rapid growth prior to 1970, but since then the drive for increased productivity has resulted in a decline in employment in the chemical industry in most developed countries. Table 1 shows chemical industry employment in the United States and several European countries for 1995.

Table 1. Chemical industry employment in selected countries (1995)



United States

1, 045,000





United Kingdom








Source: Chemical and Engineering News 1996.



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Chemical Processing References

Adams, WV, RR Dingman, and JC Parker. 1995. Dual gas sealing technology for pumps. Proceedings 12th International Pump Users Symposium. March, College Station, TX.

American Petroleum Institute (API). 1994. Shaft Sealing Systems for Centrifugal Pumps. API Standard 682. Washington, DC: API.

Auger, JE. 1995. Build a proper PSM program from the ground-up. Chemical Engineering Progress 91:47-53.

Bahner, M. 1996. Level-measurement tools keep tank contents where they belong. Environmental Engineering World 2:27-31.

Balzer, K. 1994. Strategies for developing biosafety programs in biotechnology facilities. Presented at the 3rd National Symposium on Biosafety, 1 March, Atlanta, GA.

Barletta, T, R Bayle, and K Kennelley. 1995. TAPS storage tank bottom: Fitted with improved connection. Oil & Gas Journal 93:89-94.

Bartknecht, W. 1989. Dust Explosions. New York: Springer-Verlag.

Basta, N. 1994. Technology lifts the VOC cloud. Chemical Engineering 101:43-48.

Bennett, AM. 1990. Health Hazards in Biotechnology. Salisbury, Wiltshire, UK: Division of Biologics, Public Health Laboratory Service, Centre for Applied Microbiology and Research.

Berufsgenossenschaftlices Institut für Arbeitssicherheit (BIA). 1997. Measurement of Hazardous Substances: Determination of Exposure to Chemical and Biological Agents. BIA Working Folder. Bielefeld: Erich Schmidt Verlag.

Bewanger, PC and RA Krecter. 1995. Making safety data “safe”. Chemical Engineering 102:62-66.

Boicourt, GW. 1995. Emergency relief system (ERS) design: An integrated approach using DIERS methodology. Process Safety Progress 14:93-106.

Carroll, LA and EN Ruddy. 1993. Select the best VOC control strategy. Chemical Engineering Progress 89:28-35.

Center for Chemical Process Safety (CCPS). 1988. Guidelines for Safe Storage and Handling of High Toxic Hazard Materials. New York: American Institute of Chemical Engineers.

—. 1993. Guidelines for Engineering Design for Process Safety. New York: American Institute of Chemical Engineers.
Cesana, C and R Siwek. 1995. Ignition behavior of dusts meaning and interpretation. Process Safety Progress 14:107-119.

Chemical and Engineering News. 1996. Facts and figures for the chemical industry. C&EN (24 June):38-79.

Chemical Manufacturers Association (CMA). 1985. Process Safety Management (Control of Acute Hazards). Washington, DC: CMA.

Committee on Recombinant DNA Molecules, Assembly of Life Sciences, National Research Council, National Academy of Sciences. 1974. Letter to the editor. Science 185:303.

Council of the European Communities. 1990a. Council Directive of 26 November 1990 on the protection of workers from risks related to exposure to biological agents at work. 90/679/EEC. Official Journal of the European Communities 50(374):1-12.

—. 1990b. Council Directive of 23 April 1990 on the deliberate release into the environment of genetically modified organisms. 90/220/EEC. Official Journal of the European Communities 50(117): 15-27.

Dow Chemical Company. 1994a. Dow’s Fire & Explosion Index Hazard Classification Guide, 7th edition. New York: American Institute of Chemical Engineers.

—. 1994b. Dow’s Chemical Exposure Index Guide. New York: American Institute of Chemical Engineers.

Ebadat, V. 1994. Testing to assess your powder’s fire and explosion hazards. Powder and Bulk Engineering 14:19-26.
Environmental Protection Agency (EPA). 1996. Proposed guidelines for ecological risk assessment. Federal Register 61.

Fone, CJ. 1995. The application of innovation and technology to the containment of shaft seals. Presented at the First European Conference on Controlling Fugitive Emissions from Valves, Pumps, and Flanges, 18-19 October, Antwerp.

Foudin, AS and C Gay. 1995. Introduction of genetically engineered microorganisms into the environment: Review under USDA, APHIS regulatory authority. In Engineered Organisms in Environmental Settings: Biotechnological and Agricultural Applications, edited by MA Levin and E Israeli. Boca Raton, FL:CRC Press.

Freifelder, D (ed.). 1978. The controversy. In Recombinant DNA. San Francisco, CA: WH Freeman.

Garzia, HW and JA Senecal. 1996. Explosion protection of pipe systems conveying combustible dusts or flammable gases. Presented at the 30th Loss Prevention Symposium, 27 February, New Orleans, LA.

Green, DW, JO Maloney, and RH Perry (eds.). 1984. Perry’s Chemical Engineer’s Handbook, 6th edition. New York: McGraw-Hill.

Hagen, T and R Rials. 1994. Leak-detection method ensures integrity of double bottom storage tanks. Oil & Gas Journal (14 November).

Ho, M-W. 1996. Are current transgenic technologies safe? Presented at the Workshop on Capacity Building in Biosafety for Developing Countries, 22-23 May, Stockholm.

Industrial Biotechnology Association. 1990. Biotechnology in Perspective. Cambridge, UK: Hobsons Publishing plc.

Industrial Risk Insurers (IRI). 1991. Plant Layout and Spacing for Oil and Chemical Plants. IRI Information Manual 2.5.2. Hartford, CT: IRI.

International Commission on Non-Ionizing Radiation Protection (ICNIRP). In press. Practical Guide for Safety in the Use of RF Dielectric Heaters and Sealers. Geneva: ILO.

Lee, SB and LP Ryan. 1996. Occupational health and safety in the biotechnology industry: A survey of practicing professionals. Am Ind Hyg Assoc J 57:381-386.

Legaspi, JA and C Zenz. 1994. Occupational health aspects of pesticides: Clinical and hygienic principles. In Occupational Medicine, 3rd edition, edited by C Zenz, OB Dickerson, and EP Horvath. St. Louis: Mosby-Year Book, Inc.

Lipton, S and JR Lynch. 1994. Handbook of Health Hazard Control in the Chemical Process Industry. New York: John Wiley & Sons.

Liberman, DF, AM Ducatman, and R Fink. 1990. Biotechnology: Is there a role for medical surveillance? In Bioprocessing Safety: Worker and Community Safety and Health Considerations. Philadelphia, PA: American Society for Testing and Materials.

Liberman, DF, L Wolfe, R Fink, and E Gilman. 1996. Biological safety considerations for environmental release of transgenic organisms and plants. In Engineered Organisms in Environmental Settings: Biotechnological and Agricultural Applications, edited by MA Levin and E Israeli. Boca Raton, FL: CRC Press.

Lichtenstein, N and K Quellmalz. 1984. Flüchtige Zersetzungsprodukte von Kunststoffen I: ABS-Polymere. Staub-Reinhalt 44(1):472-474.

—. 1986a. Flüchtige Zersetzungsprodukte von Kunststoffen II: Polyethylen. Staub-Reinhalt 46(1):11-13.

—. 1986b. Flüchtige Zersetzungsprodukte von Kunststoffen III: Polyamide. Staub-Reinhalt 46(1):197-198.

—. 1986c. Flüchtige Zersetzungsprodukte von Kunststoffen IV: Polycarbonate. Staub-Reinhalt 46(7/8):348-350.

Massachusetts Biotechnology Council Community Relations Committee. 1993. Unpublished statistics.

Mecklenburgh, JC. 1985. Process Plant Layout. New York: John Wiley & Sons.

Miller, H. 1983. Report on the World Health Organization Working Group on Health Implications of Biotechnology. Recombinant DNA Technical Bulletin 6:65-66.

Miller, HI, MA Tart and TS Bozzo. 1994. Manufacturing new biotech products: Gains and growing pains. J Chem Technol Biotechnol 59:3-7.

Moretti, EC and N Mukhopadhyay. 1993. VOC control: Current practices and future trends. Chemical Engineering Progress 89:20-26.

Mowrer, DS. 1995. Use quantitative analysis to manage fire risk. Hydrocarbon Processing 74:52-56.

Murphy, MR. 1994. Prepare for EPA’s risk management program rule. Chemical Engineering Progress 90:77-82.

National Fire Protection Association (NFPA). 1990. Flammable and Combustible Liquid. NFPA 30. Quincy, MA: NFPA.

National Institute for Occupational Safety and Health (NIOSH). 1984. Recommendations for Control of Occupational Safety and Health Hazards. Manufacture of Paint and Allied Coating Products. DHSS (NIOSH) Publication No. 84-115. Cincinnati, OH: NIOSH.

National Institute of Health (Japan). 1996. Personal communication.

National Institutes of Health (NIH). 1976. Recombinant DNA research. Federal Register 41:27902-27905.

—. 1991. Recombinant DNA research actions under the guidelines. Federal Register 56:138.

—. 1996. Guidelines for research involving recombinant DNA molecules. Federal Register 61:10004.

Netzel, JP. 1996. Seal technology: A control for industrial pollution. Presented at the 45th Society of Tribologists and Lubrication Engineers Annual Meetings. 7-10 May, Denver.

Nordlee, JA, SL Taylor, JA Townsend, LA Thomas, and RK Bush. 1996. Identification of a Brazil-nut allergen in transgenic soybeans. New Engl J Med 334 (11):688-692.

Occupational Safety and Health Administration (OSHA). 1984. 50 FR 14468. Washington, DC: OSHA.

—. 1994. CFR 1910.06. Washington, DC:OSHA.

Office of Science and Technology Policy (OSTP). 1986. Coordinated Framework for Biotechnology Regulation. FR 23303. Washington, DC: OSTP.

Openshaw, PJ, WH Alwan, AH Cherrie, and FM Record. 1991. Accidental infection of laboratory worker with recombinant vaccinia virus. Lancet 338.(8764):459.

Parliament of the European Communities. 1987. Treaty Establishing a Single Council and a Single Commission of the European Communities. Official Journal of the European Communities 50(152):2.

Pennington, RL. 1996. VOC and HAP control operations. Separations and Filtration Systems Magazine 2:18-24.

Pratt, D and J May. 1994. Agricultural occupational medicine. In Occupational Medicine, 3rd edition, edited by C Zenz, OB Dickerson, and EP Horvath. St. Louis: Mosby-Year Book, Inc.

Reutsch, C-J and TR Broderick. 1996. New biotechnology legislation in the European Community and Federal Republic of Germany. Biotechnology.

Sattelle, D. 1991. Biotechnology in perspective. Lancet 338:9,28.

Scheff, PA and RA Wadden. 1987. Engineering Design for Control of Workplace Hazards. New York: McGraw-Hill.

Siegell, JH. 1996. Exploring VOC control options. Chemical Engineering 103:92-96.

Society of Tribologists and Lubrication Engineers (STLE). 1994. Guidelines for Meeting Emission Regulations for Rotating Machinery with Mechanical Seals. STLE Special Publication SP-30. Park Ridge, IL: STLE.

Sutton, IS. 1995. Integrated management systems improve plant reliability. Hydrocarbon Processing 74:63-66.

Swiss Interdisciplinary Committee for Biosafety in Research and Technology (SCBS). 1995. Guidelines for Work with Genetically Modified Organisms. Zurich: SCBS.

Thomas, JA and LA Myers (eds.). 1993. Biotechnology and Safety Assessment. New York: Raven Press.

Van Houten, J and DO Flemming. 1993. Comparative analysis of current US and EC biosafety regulations and their impact on the industry. Journal of Industrial Microbiology 11:209-215.

Watrud, LS, SG Metz, and DA Fishoff. 1996. Engineered plants in the environment. In Engineered Organisms in Environmental Settings: Biotechnological and Agricultural Applications, edited by M Levin and E Israeli. Boca Raton, FL: CRC Press.

Woods, DR. 1995. Process Design and Engineering Practice. Englewood Cliffs, NJ: Prentice Hall.