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Compounds and Cleaning · Compound · Fungicide and skin treatment

Sulfur

A yellow mineral used as a garden fungicide, a scabies and skin treatment, and a fumigant for storage areas.

INDEFINITEHazardousWorks without power

Quick facts

Element
Pure sulfur
Form
Yellow powder
Hazard class
Flammable; irritant
Shelf life
Indefinite
Storage
Sealed, ventilated
What to avoid
  • Flame
  • sparks
  • moisture

See everything sulfur must never touch

What it's good for

Fungicide

Garden disease control

Skin treatment

Scabies and fungus

Fumigation

Treats storage areas

Soil

Lowers soil pH

A fine element that disrupts fungal cells and, when burned, fumigates; it is combustible, so heat is the risk.

Good to know

The brimstone of antiquity. Sulfur is one of the oldest pesticides on earth: as a fine dust it interferes with the respiration of fungal cells, halting mildew and rust, and on skin it helps clear scabies and fungus. Set alight it becomes a fumigant that sanitizes a closed space, but that same flammability is its hazard, so keep it far from sparks. Match the grade to the job: agricultural or dusting sulfur for plants, USP (pharmaceutical) grade for anything used on skin. Food grade works in a pinch; never use garden sulfur on skin, which carries wetting agents and clay.

Handling and safety

Flammable powder

It burns and gives off choking fumes; keep it from flame and sparks.

Garden fungicide

Dusted on plants it controls many fungal diseases.

Old scabies remedy

In an ointment it is a traditional treatment for scabies and skin fungus.

Lowers soil pH

Worked into soil it makes alkaline ground more acidic over time.

What I buy

My pick: sulfur powder on Amazon.

Recipes for sulfur

Questions this answers

Tap a question for the short answer.

What is sulfur used for?

Sulfur is a garden fungicide that halts mildew and rust, a traditional ointment treatment for scabies and skin fungus, a fumigant for closed storage areas when burned, and a soil amendment that lowers pH. Use agricultural or dusting sulfur on plants and USP grade on skin, never garden sulfur.

How long does sulfur last in storage?

Sulfur has an indefinite shelf life. It is a pure element in yellow powder form, so the concern in storage is safety, not spoilage: it is flammable and an irritant, and it needs to stay away from flame, sparks and moisture.

How do I store sulfur?

Store sulfur sealed, in a ventilated spot, away from flame, sparks and moisture. It is a flammable powder that burns and gives off choking fumes, so heat is the main risk to manage.

Keep going

Read nextCalcium HydroxideA strong alkaline base, also called slaked lime. It preserves eggs, raises low soil pH, sanitizes with whitewash, and binds simple mortar and plaster.Compounds and Cleaning · Compound

Related to this

Medical · Formula Sulfur Ointment for Skin Conditions (Scabies, Fungal Infections) Rubbed on as a 10 percent ointment, sulfur turns into mite-killing compounds on the skin and sheds the outer layer the burrowing scabies mites live in, a remedy that predates modern drugs and still works. Hazardous Compounds and Cleaning · Formula Sulfur Smoke Fumigation for Storage Areas Burning a little sulfur fills a sealed room with sulfur dioxide, a sharp gas that reaches into every crack and knocks back mold, mustiness, and insects. It is an old cellar and barrel treatment, and a harsh one, so treat it as a last resort. Hazardous Garden and Livestock · Formula Garden and Crop Fungicide Dust Sulfur has guarded crops from disease for more than 2,000 years: it coats the leaf, interferes with the fungus's respiration, and keeps new spores from taking hold. Hazardous Compounds and Cleaning · Compound Boric Acid Shelf life: Indefinite. Storage: Sealed glass or plastic. INDEFINITEMULTI-USEHazardous
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Compounds and Cleaning · CompoundSource: Prepper's Chemical Survival Guide, Chapter 26, p. 137 · Last reviewed 2026-09-18

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