What was Scheele's green and why was it dangerous?

Scheele's green was a brilliant emerald pigment invented by the Swedish-German chemist Carl Wilhelm Scheele in 1775. It was made by combining copper with arsenic to produce copper arsenite — a compound that gave a vivid, affordable green that no other dye of the era could match. The pigment was used on dresses, gloves, artificial flowers, wallpaper, candles, children's toys and even confectionery. It was also acutely toxic. Wearing it caused rashes and arsenic exposure; making it killed workers.

Did people really die from green dresses?

Yes, although the worst deaths fell on the workers who made the dye and the artificial-flower-makers who handled the powder all day. The most documented case is Matilda Scheurer, a nineteen-year-old artificial-flower-maker in London who died in November 1861 after months of dusting silk leaves with green arsenic powder. Her death was widely reported and helped force the issue into public debate. Customers wearing the dresses also became ill — arsenic could rub off in sweat and be absorbed through the skin — but the workers were the ones it killed fastest.

When was arsenic banned in clothing dye?

There was no single ban — public horror, medical evidence and the arrival of cheaper synthetic dyes after William Perkin's 1856 discovery of mauveine gradually drove arsenic greens out of fashion through the 1870s and 1880s. Germany banned arsenical pigments in food and household goods in 1887. Britain and the United States never passed a comprehensive ban; the dye simply lost its market. The closest modern analogue is the slow replacement of azo dyes and PFAS finishes — chemistry leaves the wardrobe when something cheaper or safer arrives, not when it is told to.

The Dress That Could Kill You: The Saga of Arsenic Green

In the 1800s there was a green so vivid it seemed to glow under candlelight, and high society went absolutely wild for it. Dresses. Gloves. Fake flowers. Wallpaper in Buckingham Palace. There was just one small problem. The colour was made with arsenic — and every swish of the skirt puffed a little poison into the air.

TL;DR. Scheele's green, invented in 1775, gave the Victorians the first cheap, brilliant green pigment they had ever seen. They put it on everything. It was made from copper and arsenic. Wearers got rashes; workers — especially the young women who made artificial flowers — died of it. One nineteen-year-old, Matilda Scheurer, died publicly in 1861 and forced the issue into the newspapers.

The Green Nobody Had Seen Before

Before 1775, a truly vivid green was almost impossible to dye onto cloth. Plant-based greens faded in sunlight or muddied to grey-brown after a wash. The only really bright greens were layered — yellow over blue — and they were expensive, unstable, and reserved for the rich.

Then in 1775, the Swedish-German chemist Carl Wilhelm Scheele — the same man who would later be credited with discovering oxygen — synthesised a vivid emerald pigment by reacting copper with arsenious oxide. The compound was copper arsenite. He published the recipe. He knew it was poisonous and said so in print. He also knew the colour was unlike anything Europe had ever seen.

The market did not hesitate. Within a generation, Scheele's green and its slightly more vibrant successor Paris green (copper acetoarsenite, developed around 1814) had spread across nearly every consumer surface in the Western world.

The Green Was on Everything

It is genuinely hard to overstate how saturated Victorian life became with arsenic green. Ball gowns were dyed in it. Gloves were tinted with it. Artificial flowers — a huge accessory category for hats, hair and evening dresses — were dusted with the loose powder by hand. Children's toys were painted with it. Candles were tinted with it; when the candle burned, the arsenic vapourised into the room. Wallpaper was printed with it, including, famously, the walls of Buckingham Palace and Napoleon's bedroom on Saint Helena, where some historians still argue it may have contributed to his death in 1821.

Even food was not safe. Bakers used Scheele's green to colour boiled sweets and cake decorations. There is a documented mass poisoning in Greenock, Scotland in 1848 from green-coloured sweets, and another at a 1858 banquet in Bradford where contaminated lozenges killed twenty-one people.

Matilda Scheurer

The illness in customers was real but slow — rashes from gloves, headaches and nausea from wallpaper that flaked arsenic into household dust, ulcerated skin where a damp ball gown had pressed against bare shoulders for an evening. But the deaths were faster among the workers, and the most documented one was a nineteen-year-old artificial-flower-maker in London called Matilda Scheurer.

Scheurer worked dusting silk leaves with green arsenic powder all day. By 1861 she was vomiting green water, the whites of her eyes had turned green, and she was telling her doctor that everything she looked at was tinged green. She died in November 1861. The autopsy found arsenic in her stomach, liver and lungs. Her death made the front page of the British Medical Journal, and within months The Lancet and the popular press were running exposes on the artificial-flower trade. A subsequent investigation found that one wreath of artificial leaves could contain enough arsenic to kill twenty people.

The Slow End

There was no dramatic ban. Public horror grew through the 1860s. Doctors and chemists published. Satirical cartoons in Punch showed skeletons waltzing in green ball gowns. And in 1856 a young English chemistry student named William Henry Perkin had stumbled, while trying to synthesise quinine, onto the first synthetic aniline dye — mauveine. The synthetic dye industry was born, and over the next two decades it produced new greens that were cheaper, safer, and more colourfast than anything arsenic could do.

Scheele's green did not get outlawed. It got out-competed. By the 1880s it had largely vanished from clothing, although Paris green carried on for decades as an agricultural pesticide and as the pigment in some artists' paints — Cezanne and Monet both used it, and arsenic-rich Paris green has been detected on canvases well into the twentieth century.

The Pattern That Keeps Repeating

The arsenic-green saga is the cleanest historical example of a pattern that has played out again and again in fashion. A new chemistry produces an effect that the market has wanted for centuries. It spreads everywhere because it is cheap and dazzling. The harm is documented but ignored as long as the economics hold. Then a substitute arrives, or the harm becomes too visible to wave off, and the chemistry quietly retires.

It happened with mercury in hatmaking. It happened with lead in cosmetics and white paint. It is arguably happening now with PFAS in stain-resistant and water-repellent finishes, with formaldehyde resins in wrinkle-free shirts, and with the microplastic shedding of synthetic fibres themselves. The names change. The shape of the story does not.

Why This Matters For What You Wear Today

Modern dyes are vastly safer than Scheele's green. But the deeper lesson the Victorians paid for in lives is still true: a fabric is chemistry, and most of the chemistry is invisible to the eye. The colour, the finish, the "easy-care" treatment, the water-repellent coating, the fibre itself — all of it is decided in a lab and printed onto a roll long before it reaches a shop floor.

You cannot, standing in a shop in 2026, see the arsenic in the green. You also cannot see whether a t-shirt is cotton or polyester just by touching it; many synthetics are engineered to feel exactly like the natural fibre they imitate. The composition label is the one window the industry is legally required to give you. It is a much smaller window than the Victorians deserved, but it is bigger than the one they ever had. Read it.