1 Next add 5 ml human blood
The manufacture of heroin
The invention of heroin
Bunsenâs burner was not the only legacy of the great chemist. He could also be called the grandfather of heroin. It was his pupil Augustus Matthiessen who established the programme that led to its discovery. Both men had participated fully in the flowering of synthetic chemistry that took place in Germany, particularly in the second half of the nineteenth century. Throughout the century German scientists were unchallenged leaders in this field of science, starting with Serturnerâs original isolation of morphine from opium. Matthiessen brought this knowledge to England when he came to work as a lecturer at St Maryâs Hospital, London. His chief English assistant was C.R. Alder Wright. Together they undertook a comprehensive exploration of codeine and morphine, synthesising hundreds of new compounds based on these molecules. Wright continued when Matthiessen retired. Their excitement still shines through the dry prose of the learned articles, as day by day they made substances that had never been previously created.
In early 1874, Wright was considering the effect of acetylation on codeine and morphine.1 He added large amounts of acetic anhydride to morphine and applied heat. His description of what happened is as detached as you would expect in a scientific report.
When morphine is brought into contact with excess acetic anhydride, tetra-acetylmorphine is produced, whether by heating a few hours at 100 degrees centigrade, or by leaving several days at room temperature. On adding sodium bicarbonate to the product dissolved in water, a precipitate is obtained, flocculent at first, but soon becoming crystalline.2
Looking over Wrightâs shoulder, the modern reader experiences a twinge of apprehension, as this portentous chemical clumps together and crystallises for the first time in history.
For we now know that this powder was not tetra-acetylmorphine at all.3 At this date Wright was misinformed about the molecular structure of morphine, believing it to be a double molecule. Later analysis has shown that the new substance had two rather than four acetyl groups attached to each morphine molecule, and should therefore have been called diacetylmorphine.4 This name was later abbreviated to diamorphine, and much later the substance was christened âheroinâ.
Wright did not concern himself overmuch with the use made of his new creations. For him, this was an exercise in chemical mapping, rather than practical medicine. After exhausting codeine and morphine, he moved on to the chemistry of Japanese camphor, and then to household soaps and fireworks. Nonetheless, some of his substances were tested on animals, in London and later in Edinburgh.5 The investigators concluded that none of Wrightâs morphine compounds had any significant advantage over morphine itself. Diamorphine was therefore not used as a medicine in England until the German company Bayer marketed it as heroin in 1898.
The British frequently complain that they are good at making inventions, but bad at exploiting them. Other Wright creations included benzylmorphine, ethylmorphine and apomorphine. All had to wait many years before a medical use was found. None were used medically in Britain until reintroduced by German companies. When Bayer marketed heroin as a treatment for tuberculosis, it was other German firms that fought back by promoting benzylmorphine as Peronin and ethylmorphine as Dionin. Some Wright compounds had to wait longer. It was eighty years before the American writer William Burroughs proclaimed apomorphine to be the only effective cure for heroin addiction.6
Injured amour propre must have played a part in the lukewarm reception these medicines received in Britain, when they were trumpeted as German inventions in 1898. J.F. Macfarlanâs, the Scottish pharmaceutical company, wrote in disgust to the British Medical Journal:
The introduction and advertising of well-known esters of morphine under such fanciful names as âperoninâ, âdioninâ & âheroinâ may mislead some members of the medical profession into the belief that they are new and proprietary preparations âŠ. As a matter of fact, they are all prepared and supplied under their proper names by ourselves and other competent manufacturers. 7
The complaint was not justified. Although Macfarlanâs may have produced these substances as chemicals, there is no evidence that they sold them for medical use before the Germans stole their thunder.8
The Germans had in truth arrived at the formulation themselves. The end of the century was a creative time for medical chemistry. The German chemical industry had grown rich on aniline dyes. These had almost universally replaced natural dyes as colouring agents and could be made cheaply from the by-products of oil and gas manufacture. By 1890 this hegemony was under threat from increased competition and reduced access to primary materials. The companies wanted to diversify and find other outlets for their chemical production lines. Medicine was an obvious target. Many firms invested in state-of-theart laboratories and competed to employ the top pharmaceutical chemists. In this flurry of activity, diamorphine was reinvented on at least two occasions.
Joseph von Mering became famous for discovering hypnotic barbiturates. In 1897 he was working for E. Merck of Darmstadt. He synthesised a number of opioid alkaloids including diamorphine. He was probably the first to test diamorphine on human subjects, but he was not particularly impressed. He thought that ethylmorphine was better suited for treating pain and tubercular coughs. Diamorphine was dropped and later that year Merck marketed ethylmorphine under the name of Dionin.9
Bayer was another large dye firm that had invested heavily in pharmaceutical research. Their laboratory was considered the most advanced in the world and they had had the good fortune to attract a chemist of growing reputation named Heinrich Dreser. Dreser was particularly interested in acetylation. He believed this process reduced the side effects of medications and also increased their potency. In 1894 Bayer had acetylated tannic acid which was used for the treatment of diarrhoea. They called the resulting compound Tannigen. It was less bitter than tannic acid and was also more effective. It quickly became popular among doctors and patients.
Encouraged by his success, Dreser set up a research group to investigate the acetylation of other medicines. The leaders in this group were Felix Hoffman and Arthur Eichengrun. In August 1897 they acetylated salicylic acid, producing the compound which was later called aspirin. Just a fortnight later they acetylated morphine and produced diamorphine, later called heroin. Within the space of two weeks they had created two new substances of astounding importance. Both could be leading contenders for the title of most important drug of the twentieth century.10
Of the two new compounds, heroin progressed most easily. Dreser was soon convinced of its power as a treatment for tuberculosis. He developed it quickly through animal and human testing, and brought it to the market in 1898.11, 12 He thought it had a specific stimulatory effect on respiration, similar to that of digitalis on the heart, and he named it heroin in reference to the contemporary fashion for âheroicâ treatment, that is to say treatment that used powerful medicines in high doses.13 He was clearly proud of his new medicine. He took the credit entirely for himself, failing to mention the work of Hoffman and Eichengrun or of earlier pioneers.
He was not convinced by aspirin and vetoed its further development. Had not Eichengrun ignored Dreserâs instructions, aspirin might well have been abandoned and forgotten. It was only as a result of Eichengrunâs unofficial action that its extraordinary properties were eventually recognised. It was finally also marketed alongside heroin in 1898. Even though Eichengrun played the more important part, Hoffman was credited by the firm with the invention of aspirin and for the most part still enjoys this reputation. The neglect of Eichengrun may have been a result of anti-Semitism. He was Jewish and later interned in Theresienstadt concentration camp.14 Shortly before his death, he wrote a full account of his part in the discovery and development of aspirin. Understandably, he did not argue at this time that he was also the inventor of heroin. The subsequent history of the drug would have discouraged pride in this achievement. Nonetheless, Eichengrun has probably a good claim to the title, even if he did not want it.
Vats and funnels â industrial production of heroin
All the early makers of heroin basically used the same technique as Wright. They heated morphine with acetic anhydride and then used an alkali such as sodium bicarbonate to precipitate the powder. After its launch on the market, the manufacture of heroin was streamlined to enable industrial production but it still relied on morphine and acetic anhydride. Legitimate production increased rapidly, even after its use in medicine had become suspect. In spite of their initial scruples, British companies soon took over as the major producers. Companies such as Whiffens, T. & H. Smith and Macfarlanâs made huge profits principally by exporting heroin and morphine to China, where it was mostly consumed by drug addicts. It was noted at the time that âthe Chinaman buys his morphia by the pound, and his predilection is for Macfarlanâs, which he must have in original pound bottlesâ.15
It was certainly a scandal that European firms were capitalising so handsomely from Chinese drug addiction. To many it seemed that pharmaceutical trade was a continuation of the Opium Wars by other means. Pressure grew for action, spearheaded by the Americans who were concerned about their own problem of addiction and their newly acquired territories in the Philippines.16 In 1912 the first international treaty was agreed and the first bricks laid in the increasingly cumbersome structure of international narcotic control.
As international controls started to bite, British production was reduced and Whiffens even had their manufacturing licence revoked following a smuggling scandal in 1923.15 La Société Roessler et Compagnie, Mulhouse, took over for a time as chief producer. In 1928 it produced 4.35 metric tons of heroin, considered to be enough to satisfy the medical needs of the whole population of the world three times over. At the same time a Dutch company named Chemische Fabriek Naarden was actively importing and exporting heroin and cocaine through an underground network designed to evade the regulatory efforts of the League of Nations. The Opium Commission claimed that in 1928 it controlled over half the world production of heroin. The local authorities did not prosecute the company because they judged that although it had acted contrary to the spirit of the law, no single Dutch law had in fact been broken.17
Swiss companies have traditionally enjoyed more freedom from international conventions. Factories in Basle and Zurich plugged the gap as French production subsided. After the Swiss had bowed to international representations, production passed to a factory licensed to the French but operating in Constantinople. When this was closed by the Turks, the gauntlet was taken up by the Bulgarians. A new factory started up in Sofia. It is reckoned that this factory produced nine tons a year, mostly destined for the illicit market in Egypt and China.18
The Bulgarians in turn acceded to pressure, and suppressed this factory in 1931. Thereafter the Japanese became the major manufacturers and kept this dubious distinction right up until the end of the war. Heroin was distributed freely in the occupied Chinese province of Manchuria as an aspect of official policy. Not only did it produce a compliant population, but it also greatly enriched the Manchukuo Monopoly Bureau which was the only authorised supplier. Between 1934 and 1937, 94 per cent of world heroin production came from a Japanese factory in Seoul, Korea.19 Japan at this time was aggressive and highly militarised. It was asserting its national identity after years of humiliation at the hands of Western powers. It was in no mood to bow to pressure from the League of Nations narcotic control programme. Indeed it had walked out of the League in 1931, after the League had condemned the Japanese invasion of Manchuria. It is ironic that in Japan itself heroin dependence was almost unknown.
It can be seen that there was little need for illicit production of heroin as long as the great trading countries of the world were taking turns to supply the burgeoning market created by heroin addiction. Nonetheless, some illicit production did begin in China before World War II, mostly in the region of Shanghai. After the war, the system of international controls passed to the newly formed United Nations in 1946. The Japanese were forced out of the market following their defeat in the war.
At long last, legitimate production of heroin was confined to supplying genuine medical need. World production plummeted and production was banned in many countries. Macfarlanâs of Edinburgh had survived as heroin producers, having complied strictly with international treaties from about 1921. They took over once again as the worldâs leading licit manufacturer, a position which they have maintained until the present day. The amount they have produced since that time is tiny compared with their heyday around the time of World War I. It has been strictly for medical use in the few countries where heroin is still prescribed.
There was now a large number of heroin addicts, but no access to pharmaceutical heroin. Clandestine factories emerged across the world, for example in Turkey, France, Mexico, Greece, Hong Kong and the United States. By far the biggest producer at this time was the so-called Red Lion Company in Shanghai and its various offshoots. When the Communists took power in China, stringent penalties were imposed on drug trafficking. Most of the Shanghai chemists fled to Hong Kong and established their laboratories on British territory. This trade soon fell under the control of the Chiu Chau syndicate from Kwangtung, until their power base was weakened by huge drug seizures by the Hong Kong authorities in 1974. Many skilled heroin chemists left for Thailand and Malaysia from where they continued to export heroin into Hong Kong.20 When enforcement became more effective in these countries during the 1980s, the chemists again moved on â to Myanmar, Laos, Pakistan and Afghanistan.
Today, the vast majority of heroin is produced in Afghanistan and the Golden Triangle, although there is also increasing production in Mexico and Latin America. In the East, a large number of the heroin technicians are direct descendants and apprentices of the original Shanghai chemists. Knowledge of their techniques will therefore give a good idea of how most of the worldâs illicit heroin is manufactured. Fortunately, both the Hong Kong Police and the US Department of Justice have provided detailed accounts based on their respective struggles with producers in Hong Kong and South-East Asia.21 These give a graphic picture of the whole chain of production from the opium poppy through to heroin, along with details of all the reagents involved. The account is...