Natural citric acid for cleaning, descaling, and more
Citric acid is one of the most versatile natural cleaners on the market. A fine, food-grade powder derived from citrus, it dissolves the calcium and magnesium deposits that cause hard-water spots, scale buildup in coffee makers and kettles, soap scum on shower doors, and rust stains in toilets. No harsh chemicals, no perfumes, no surfactants — just one ingredient that does the job.
Shine Magic anhydrous citric acid is 100% pure, food-grade, and made to a higher standard than the technical-grade citric acid sold as a cleaning chemical. That means it is safe to use anywhere in your home — including on surfaces and equipment that contact food or beverages.
- 100% pure food-grade citric acid powder
- Cleans hard-water deposits, descales appliances, removes rust stains
- Replaces white vinegar without the smell
- Safe on most surfaces; rinses clean with no residue
- Made in Austin, TX
- Available in 8oz (227g) and 5lb (2.27kg)
Citric acid is highly concentrated. A little goes a long way. Always dissolve in warm water before use on surfaces; never apply dry powder directly to fixtures or appliances.
COFFEE MAKER / ESPRESSO MACHINE DESCALING
Dissolve 2 tablespoons (~25g) of citric acid in a full reservoir of warm water. Run a brew cycle without coffee. Run two cycles of plain water to rinse. Repeat every 1–3 months depending on water hardness.
KETTLE DESCALING
Fill the kettle halfway with water, add 1 tablespoon citric acid, bring to a boil, let sit 15 minutes, then rinse thoroughly.
TOILET BOWL CLEANING (HARD-WATER STAINS)
Sprinkle 2–3 tablespoons around the bowl, let sit overnight, scrub and flush. For severe stains, drain the bowl first and apply directly to wet stains.
LAUNDRY (WHITES, HARD-WATER RESIDUE)
Add 1–2 tablespoons to the wash with your regular detergent. Helps remove mineral residue that dulls fabric over time. Not a substitute for detergent.
SHOWER GLASS / TILE / FIXTURES
Mix 2 tablespoons in 2 cups warm water in a spray bottle. Spray, let sit 5–10 minutes, scrub and rinse. Avoid prolonged contact with natural stone (marble, granite, travertine) — citric acid will etch it.
FOOD APPLICATIONS
For canning, candy-making, cheese-making, and other culinary uses, follow your recipe's specified amount. Typical ranges: 1/4 to 1 teaspoon per quart for canning; recipe-specific for cheese and candy.
For dishwashers specifically, we recommend our purpose-built Dishwasher detergent rinse aid booster — a complete formula with citric acid plus complementary ingredients designed specifically for the dishwasher use case.
100% citric acid (anhydrous, food-grade)
That's the entire ingredient list. No anti-caking agents, no fillers, no additives.
Sourced from fermentation of non-GMO sugar substrates, manufactured to food-grade standards.
Allergens: none. Gluten-free, vegan, kosher-compatible.
Hard-water stains, scale, and rust deposits are mostly insoluble calcium, magnesium, and iron compounds. Citric acid is a mild organic acid that binds to these metal ions through a process called chelation, pulling them off the surface and into solution. The dissolved minerals then rinse away with water.
That is also why citric acid is the active ingredient in most "natural" descalers, hard-water removers, and rust-stain treatments sold at much higher prices. The active chemistry is the same. We sell the ingredient directly, in food-grade quality, with no markup for proprietary blending.
All orders over $50 or subscriptions get free shipping! Our team will ship your order within 5 business days. The time it takes to receive your order depends on the shipping method chosen at checkout.
We hope you to love it, but if you need to make a return, breathe easy. Returns are always free and can be done in person or by mail.
Citric acid is the active ingredient in most natural descalers and hard-water cleaners. Shine Magic sells it in pure, food-grade form, so the same powder cleans your coffee maker, descales your kettle, lifts rust from porcelain, and goes into your homemade preserves.
How to read this: Citric acid is a raw ingredient, not a formulated product. This compares Shine Magic's pure, food-grade powder against the alternatives a household shopper would actually reach for when cleaning, descaling, or preserving naturally.
| Compare | Shine Magic Citric Acid Best overall fit | White Vinegar Diluted acetic acid | Baking Soda Mild base, powder | Lemi Shine Citric Acid Food-grade powder | Technical-grade Citric Acid Industrial powder |
|---|---|---|---|---|---|
| Made to remove hard-water deposits and scale | Best fit | Some helpSlower and weaker on heavy buildup | LimitedWrong chemistry for mineral scale | ✓ | ✓ |
| Lifts rust and lime stains | ✓Chelates iron and mineral compounds out of porcelain and stainless | Partial | —Acts as an abrasive scrub, not a stain dissolver | ✓ | ✓ |
| Pure, single-ingredient formula | Best fit100% citric acid, no anti-caking agents or fillers | ✓ | ✓ | ✓ | ✓ |
| Smell-free for indoor use | ✓Odorless | —Strong vinegar smell | ✓ | ✓ | ✓ |
| Concentrated, not diluted | Best fitDry powder. Dose to the job | —About 5 percent acid, 95 percent water | ✓ | ✓ | ✓ |
| Food-grade certified | ✓Made to food-grade standards. Safe on food-contact surfaces | ✓ | ✓ | ✓ | VariesOften industrial-grade. Check the label |
| Use-case dosing guidance included | ✓Ratios for coffee makers, kettles, laundry, toilets, rust, and food | — | — | Limited | —Industrial spec sheets, not household dosing |
| Ingredient story | One ingredient. Food-grade. Made in Austin.A traceable, single-ingredient powder for households that want one thing in the jar | Diluted acetic acidVersatile but weaker on scale, with a lingering smell | Sodium bicarbonateA mild base. Best as a scrub or odor absorber, not a descaler | Citric-acid basedSame chemistry. The closest direct comparison | Industrial-grade citric acidOften imported, often without food-grade certification |
Shine Magic citric acid handles descaling, rust removal, hard-water stains, laundry whitening, and food preservation with a single food-grade powder. Mix it in warm water for the job at hand.
Results can vary based on water hardness, surface type, and application method. Citric acid is a mild organic acid. Avoid prolonged contact with natural stone surfaces like marble, granite, and travertine, which can be etched by any acid. Always follow product directions and review product labels.
Removes scale buildup that ruins extraction and shortens machine life
Restores boil time and clears mineral coating
Dissolves the hard-water ring without bleach
Removes mineral residue that yellows fabric
Lifts iron stains from porcelain, stainless, and concrete
Canning, candy-making, cheese-making, sour drinks
Citric acid is one of the most versatile natural cleaners available. The most common uses are descaling coffee makers, kettles, and shower heads; removing hard-water spots from glass and fixtures; cleaning toilet bowls; whitening laundry; and removing rust stains. It's also used in food applications like canning, candy-making, and cheese-making.
Yes. Food-grade citric acid is one of the safest cleaning ingredients available. It's the same compound that gives lemons and oranges their tartness, and it's used as a preservative in many processed foods. It's biodegradable, non-toxic to pets at the concentrations used in cleaning, and septic-safe. Rinse thoroughly when cleaning surfaces that contact food.
Both have the same chemical structure and clean equally well. Food-grade is produced to tighter standards with traceability and certifications that allow it to be used in food, on food-contact surfaces, and in commercial food and beverage operations. We use food-grade so the same powder can clean your kitchen counter, descale your espresso machine, and go into your homemade canned tomatoes.
It depends on the application, but as a rule of thumb, 1–2 tablespoons in warm water handles most cleaning jobs.
No. Citric acid and ascorbic acid (vitamin C) are different molecules, though both are mildly acidic and both occur in citrus fruits. Citric acid is not a source of vitamin C.
Used as directed, no. Citric acid is the active ingredient in most commercial descalers, and is recommended by many appliance manufacturers for descaling coffee makers and kettles. Always rinse thoroughly after descaling. Avoid prolonged contact with natural stone surfaces (marble, granite, travertine), which can be etched by any acid.
Yes, in most cleaning applications. 1 tablespoon of citric acid powder dissolved in 1 cup of water gives roughly the same descaling power as undiluted white vinegar, with no smell.
Citric acid is widely used in food and is considered low-toxicity. That said, the concentrated powder can irritate eyes and the respiratory tract — treat it like any other cleaning product. Keep out of reach of children and store sealed.
For dishwashers specifically, we recommend our purpose-built the Shine Magic Dishwasher Rinse Aid Booster, which combines citric acid with complementary ingredients formulated specifically for dishwasher use. Raw citric acid will work, but the rinse aid booster is the complete, dosed-correctly solution designed for the job.
