What Is Curing Salt and How Do You Use It Correctly?

Curing salt is one of the most misunderstood ingredients in meat processing. Its name sounds chemical, its pink colour looks unusual, and stories about nitrites cause concern among people who encounter it for the first time. Yet curing salt has been used to preserve meat safely for centuries — and the science behind how it works is well established.

This guide explains what curing salt is, how it functions, the difference between the main types, how to use it correctly and safely, and where to buy it in South Africa. Whether you are making bacon at home for the first time or running a commercial sausage operation, understanding curing salt is essential for safe, high-quality cured meat production.

What Is Curing Salt?

Curing salt is not a naturally occurring mineral — it is a purpose-made mixture of sodium chloride (regular table salt) and sodium nitrite, with the addition of a pink food dye to distinguish it visually from ordinary salt.

The active ingredient is sodium nitrite (NaNO2) — a compound that performs three critical functions in cured meat products:

• Preservation — inhibits the growth of Clostridium botulinum, the bacterium responsible for botulism, one of the most dangerous foodborne illnesses
• Colour development — reacts with myoglobin in the meat to produce the stable pink colour associated with bacon, viennas, polony, and Russian sausage
• Flavour contribution — contributes the distinctive 'cured meat' taste that separates bacon from plain pork or a vienna from a fresh sausage

Why Is Curing Salt Pink?

Curing salt is intentionally dyed pink — or sometimes red — to prevent it from being mistaken for ordinary table salt. Because sodium nitrite is toxic at high doses, accidental substitution of curing salt for regular salt in a recipe could have serious consequences. The pink colour serves as a clear visual warning that this is a specialised ingredient requiring careful measurement.

The pink colour of the curing salt itself has nothing to do with the pink colour it produces in cured meat — that is a chemical reaction between sodium nitrite and meat myoglobin.

Types of Curing Salt: Prague Powder #1 vs #2

Type	Also Known As	Contains	Use For	Cure Time
Prague Powder	Pink curing salt, Instacure, Quick cure	6.25% sodium nitrite + 93.75% salt	Bacon, viennas, Russians, polony, ham, short-cured products	Hours to days
Prague Powder	Instacure	6.25% sodium nitrite + 4% sodium nitrate + 89.75% salt	Dry-cured salami, coppa, aged charcuterie, long-cure products	Weeks to months

When to Use Prague Powder #1

Prague Powder #1 is the correct choice for the vast majority of home and commercial curing applications in South Africa. It is used in:

• Bacon — wet or dry cured
• Gammon and ham
• Russian sausage
• Viennas and frankfurters
• Polony and processed meat loaves
• Cabanossi and cooked salami
• Any product that will be cooked or consumed within a few days to weeks of curing

When to Use Prague Powder #2

Prague Powder #2 is used for products that undergo extended curing over weeks or months — particularly traditional European-style charcuterie that is air-dried without cooking. The sodium nitrate in #2 acts as a slow-release reservoir, gradually converting to sodium nitrite over the extended cure period.

For most South African home producers and small butcheries, Prague Powder #1 is sufficient. Prague Powder #2 is only necessary if you are producing traditional dry-cured products with cure times exceeding two weeks.

Freddy Hirsch Curing Salt Products

Freddy Hirsch supplies curing salt products including Red Cure and Quick Red Cure — pre-measured, food-grade curing compounds formulated for use in a range of processed meat products. These are calibrated for the South African market and are available through the Freddy Hirsch online shop and branch network.

Buy food-grade curing salt, Prague Powder, and Red Cure from Freddy Hirsch's online shop or nearest branch.

How to Use Curing Salt: Dosage and Method

Correct dosage is the most critical aspect of working with curing salt. Too little and the product will not cure properly — it will be grey, lack the cured flavour, and have reduced preservation. Too much is a food safety concern — sodium nitrite is toxic at elevated doses.

Standard Dosage for Prague Powder #1

• 2.5g of Prague Powder #1 per kilogram of meat — this is the widely accepted standard
• This equates to approximately half a teaspoon per kilogram
• Always weigh curing salt on a digital scale — do not measure by volume for curing applications
• Never increase the dosage without a verified formulation from a food safety professional

Application Methods

Dry Cure Method

1. Weigh the meat accurately.
2. Calculate the exact amount of curing salt required (2.5g per kg of meat).
3. Combine the curing salt with the rest of the dry cure ingredients (salt, sugar, spices).
4. Rub the cure evenly over all surfaces of the meat.
5. Place in a sealed container or vacuum bag and refrigerate.
6. Turn the meat daily to ensure even distribution of the cure.
7. Cure for the time specified in your recipe — typically 1 day per 10mm of thickness for bacon.

Wet Cure (Brine) Method

1. Dissolve the curing salt and other cure ingredients in cold water to make a brine.
2. Submerge the meat completely in the brine, ensuring no part is exposed to air.
3. Refrigerate for the specified cure time.
4. For thick cuts, use a brine injector to pump brine into the centre of the meat to ensure even curing throughout.

In Sausage and Processed Meat Production

In sausage and processed meat applications, curing salt is mixed directly into the meat with the other ingredients. Freddy Hirsch's complete packs for products like Russians, viennas, and polony include the curing salt pre-measured as part of the pack — removing the need to handle and measure curing salt separately.

Use Freddy Hirsch complete packs for Russians, viennas, polony, and bacon — the curing salt is pre-measured for you.

Curing Salt and Food Safety

Sodium nitrite is effective against Clostridium botulinum — the bacterium that produces botulinum toxin, one of the most potent biological toxins known. In cured meat products, nitrite prevents the germination of botulinum spores, which is particularly important in products that are:

• Smoked at low temperatures (below 60°C)
• Air-dried without cooking
• Vacuum packed and stored for extended periods
• Produced in an anaerobic (oxygen-free) environment where botulism risk is highest

Is Curing Salt Safe?

At the levels used in food production, curing salt is safe. The concentration of sodium nitrite in Prague Powder #1 is 6.25% — the remainder is ordinary salt. At the standard application rate of 2.5g per kilogram of meat, the resulting concentration of sodium nitrite in the finished product is well within internationally accepted safe limits.

Sodium nitrite at high doses is toxic — this is why accurate measurement and proper storage are essential. Keep curing salt clearly labelled, stored separately from regular salt, and out of reach of children.

Common Mistakes When Using Curing Salt

Substituting table salt for curing salt: Table salt has no preservative or colour-fixing properties. A product made without curing salt will be grey, lack the cured flavour, and will not be preserved against botulism.

Confusing Prague Powder #1 and #2: Using #2 where #1 is required — or vice versa — will produce incorrect results. For most South African applications, #1 is the correct choice.

Measuring by volume instead of weight: A teaspoon of curing salt is not a precise measurement. Always use a digital scale for curing applications.

Uneven distribution in the cure: Curing salt must be evenly distributed throughout the product. In dry curing, turn the meat daily. In sausage production, mix thoroughly until the cure is uniformly incorporated.

Storing curing salt near regular salt: Keep curing salt clearly labelled and stored separately. Accidental use of curing salt as table salt — or vice versa — has serious consequences.

Can You Cure Biltong with Curing Salt?

Traditional South African biltong is not cured with sodium nitrite. The preservation of biltong relies on salt, vinegar (acidity), and drying (moisture reduction) — not nitrite curing. Adding curing salt to biltong would change its colour to an uncharacteristic pink and alter its traditional flavour profile.

Some producers of commercially packaged biltong do use preservatives for extended shelf life, but traditional home-produced biltong does not require or typically include curing salt. If you are producing biltong to a traditional recipe, follow a biltong-specific guide and do not apply the same curing principles used for bacon or sausages.

Conclusion

Curing salt is an essential functional ingredient in the production of bacon, gammon, viennas, Russians, polony, and other cured meat products. Its role in preservation, colour development, and flavour is not cosmetic — it is fundamental to the safety and quality of these products. Used correctly at the right dosage, it is safe and effective. Used incorrectly, it presents serious food safety risks.

For most home producers and small butcheries, using Freddy Hirsch's complete packs — which include pre-measured curing salt as part of the formulation — is the safest and most reliable approach. For standalone curing applications like bacon and gammon, Freddy Hirsch's Red Cure and Quick Red Cure products are available in the correct formulations for South African conditions.

Buy curing salt, Red Cure, and complete packs for cured meat products from Freddy Hirsch online or at your nearest branch.

FAQ

What is the difference between curing salt and regular salt?

Regular salt (sodium chloride) adds flavour and draws moisture from meat but does not prevent botulism or develop the pink colour associated with cured meats. Curing salt contains sodium nitrite in addition to regular salt, which provides preservation against dangerous bacteria, fixes the pink colour in cured meat, and contributes the characteristic cured flavour.

How much curing salt per kg of meat?

The standard dosage for Prague Powder #1 is 2.5g per kilogram of meat. Always weigh on a digital scale. Do not increase this dosage without a verified formulation.

Can I use curing salt for biltong?

No. Traditional biltong is preserved through salt, vinegar acidity, and drying — not nitrite curing. Adding curing salt to biltong changes its colour and flavour in ways that are inconsistent with the traditional product.

Where can I buy curing salt in South Africa?

Freddy Hirsch supplies food-grade curing salt products — including Red Cure and Quick Red Cure — through their online shop and branch network across South Africa.

Is pink curing salt the same as Himalayan pink salt?

No. These are completely different products. Himalayan pink salt is a mineral salt with its colour derived from trace iron oxide. Pink curing salt (Prague Powder) is a mixture of regular salt and sodium nitrite, dyed pink specifically to prevent confusion with table salt. They cannot be substituted for each other.