How a classic specialty chemical market works: the synthetic dye industry: Key terms, quiz and sources

Understanding Chemicals / Module 11: How a classic specialty chemical market works: the synthetic dye industry Wrap-up

How a classic specialty chemical market works: the synthetic dye industry: review

Key terms

Specialty chemical: A formulated product sold on what it can do for the customer rather than on its chemical purity, usually under a brand name.
Fine chemical: A pure substance made in small volumes in multipurpose batch plants and sold on specification, typically under about 1,000 t/yr and above about $10/kg.
Dye intermediate: A chemical made from aromatics such as benzene or naphthalene that is not itself a dye but is a building block for dyes, such as aniline or H-acid.
Coal tar: The black liquid by-product of making gas and coke from coal, the original source of benzene, naphthalene and anthracene.
Mordant: A metal salt applied to fibre so that a dye will bind to it; the choice of mordant can change the final colour.
Fastness: A dye's resistance to losing colour through washing, rubbing, light or bleach.
Direct dye: A water-soluble dye that colours cotton without a mordant, first achieved with Congo Red in 1884.
Vat dye: An insoluble dye made soluble by chemical reduction for dyeing, then oxidised back inside the fibre; indigo is the best known.
Reactive dye: A dye that forms a covalent chemical bond with the fibre, giving very high wash fastness on cotton.
Disperse dye: A nearly insoluble dye applied as a fine dispersion that dissolves into hydrophobic fibres such as polyester.
Azo dye: A dye containing an N=N link between aromatic rings, made by diazotisation and coupling; the largest family of dyes.
Diazotisation: Reacting an aromatic amine with nitrous acid at 0-10 C to form a reactive diazonium salt.
Coupling: Reacting a diazonium salt with a phenol, naphthol or amine to form an azo dye.
Process patent: A patent protecting a method of making a product rather than the product itself; Germany's only form for chemicals after 1877.
Working clause: A patent rule requiring the invention to be manufactured in the granting country, or licensed, on pain of revocation.
Saturation patenting: Filing patents across every area of chemistry that might yield new products, so that newcomers need a licence.
Scope economies: Cost savings from making many related products with shared equipment, intermediates and sales networks.
Convention: A price-fixing or market-sharing agreement among producers; the dye industry's term for a cartel.
Coevolution: Murmann's term for two evolving populations, such as firms and universities, each significantly shaping the other's survival.

Try it in the table

Open the Dyes tile and compare its typical price per kilogram with the Benzene tile. Using this module's figure that dyes were only 1 to 2.5% of a textile's cost, ask why a dye maker can charge such a premium over its raw material.
In the Sulphuric acid tile, look at typical plant sizes and price. Then reread the case of Bayer's 1893 acid plant: what does the contrast in scale and margin tell you about why a dye firm found heavy chemicals so hard?
Open the Organic pigments tile and note which countries lead production today. Compare with the 1913 table in Part 2: where has the industry moved, and does Pollak's account of China and India match what the tile shows?
Look at the Polyester fibre and Viscose fibre tiles. Using the dye-class table in Part 1, work out which dye class each fibre needs and what that implies for which dye makers benefit as polyester grows.
Open the Paracetamol tile. Kent notes that reducing nitrobenzene in acid gives para-aminophenol, the key step to paracetamol. Trace how dye-intermediate chemistry led firms like Bayer and Hoechst into pharmaceuticals.
In the Custom synthesis (CDMO) tile, compare its business model with the Leverkusen plan in Part 4: shared multipurpose equipment, many products, scheduling by campaign. Which of Murmann's lessons about scope apply?

Final quiz

Pollak says specialty chemicals are sold on 'what they can do'. Which dye example best illustrates this?

Congo Red's value lay in what it did in the dyehouse: it made cotton dyeing simpler and cheaper. The other options are commodities or intermediates sold on specification.

World dye output rose from about 3,500 t in 1871 to about 162,000 t in 1913. Roughly how many times larger?

162,000 / 3,500 is about 46. In value terms output rose 3,800% from 1862 because prices fell steeply.

Which statement about firm numbers is correct according to Murmann's database?

Germany had about 116 entrants and 91 exits (78%), Britain 47 and 36 (77%). The world never had more than about 85 firms at once.

Why was the timing of Germany's 1877 patent law described as fortunate?

Murmann argues an earlier law would have sheltered weak firms as in Britain. Arriving in 1877, it let already-strong firms fund research with fifteen-year monopolies.

What did BASF need, beyond Heumann's chemistry, to make synthetic indigo competitive?

The process needed stronger sulphuric acid, which led to the contact process, and large amounts of cheap chlorine, for which BASF licensed electrolysis. It spent 18 million gold marks in all.

In the azo dye route, what does sulphonation mainly contribute?

Kent explains that sulphonic acid groups confer water solubility and fibre affinity, and also direct later substitutions.

Which was NOT one of the reasons British dye makers lost tariff and patent battles?

Britain granted product patents. The other three are reasons Murmann gives for British weakness in collective action.

Which modern fact best supports the lesson that leadership in a specialty market can migrate?

DyStar was formed from the Bayer and Hoechst dye businesses, later joined by BASF's. Its rescue by an Indian firm, alongside China's output of over 1 million tonnes, shows volume and then ownership moving from Europe to Asia.

Next module: The fine and specialty chemicals business: how it really works →

Sources for this module

Murmann, J.P. (2003), Knowledge and Competitive Advantage: The Coevolution of Firms, Technology, and National Institutions, Cambridge University Press · pdf pp. 2-5, 23, 26-33, 46-62, 66-116, 118-187, 189-217, 219-244, 263-281
Freeman, H.S. and Mock, G.N., Dye Application, Manufacture of Dye Intermediates and Dyes, Ch 13 in Kent, J.A. (ed.) (2012), Handbook of Industrial Chemistry and Biotechnology, 12th ed., Springer · pdf pp. 484-556
Pollak, P. (2011), Fine Chemicals: The Industry and the Business, 2nd ed., Wiley · pdf pp. 26-29, 35, 71-74, 88, 116-120, 152-153