Curing Salt Guide: Cure #1, Prague Powder, and Nitrite Dosing

By Cedrick Reese, BrineCalculators.com

For anyone about to buy a bag of pink curing salt for the first time, or wondering whether the one already in the cupboard is the right one.

Curing salt guide, short version: Cure #1 (Prague Powder #1) is salt plus 6.25% sodium nitrite, dosed at 0.25% of meat weight for 156 ppm ingoing nitrite, under the 200 ppm federal limit for dry-cured bacon. It is never the same product as pink Himalayan salt.

What Cure #1 actually is

Cure #1 is the product behind most of the names you will see on a bag of curing salt: Prague Powder #1, Insta Cure #1, DQ Curing Salt, and simply "pink curing salt." It is table salt with 6.25% sodium nitrite mixed through it, colored pink with a food-safe dye. The dye carries no nutritional or curing function of its own; its entire job is to make the product visually impossible to mistake for a jar of plain salt sitting next to it on the same shelf.

Cure #1 is the curing salt for products that are cooked, smoked, or refrigerated within a few weeks: bacon, corned beef, pastrami, most home-cured hams, and the majority of sausage. The nitrite goes to work as soon as it touches the meat, which is exactly what a short cure needs and exactly why a months-long dry cure needs a different product (Cure #2, covered below). At the standard home dose, 0.25% of the meat's weight, it delivers 156 ppm of ingoing sodium nitrite, a figure this guide checks against two separate federal limits later on.

Need the actual numbers for your cut? This page explains what Cure #1 is and how the dosing works; the bacon curing calculator does the weighing for you, in grams, for a dry or wet cure of any size, and checks the result against the nitrite limit automatically.

Cure #1 vs. pink Himalayan salt

This is the mix-up worth spelling out plainly, because it is a genuine food-safety hazard rather than a labeling curiosity. Pink Himalayan salt is plain sodium chloride with trace minerals, mostly iron oxide, that happen to tint it pink or peach. It contains no nitrite and cures nothing; using it in place of Cure #1 leaves a smoked or long-held product with none of the protection against Clostridium botulinum that nitrite provides.

Cure #1's pink color runs the opposite direction. It is a dye added on purpose, specifically so a cook reaching for salt in a hurry sees pink and stops. Confusing the two products the other way, using Cure #1 as if it were table or Himalayan salt at a normal seasoning ratio, delivers a nitrite dose many times over any safe limit, because a cure that is correct at 0.25% of meat weight becomes wildly excessive at the volume a cook would use to season food by taste.

Keep the two salts in different containers, both clearly labeled, and never store Cure #1 anywhere it could be reached for by taste or by a child. The pink color of curing salt is not a decorative or mineral trait; treat any pink salt in a curing context as Cure #1 until the label says otherwise.

Cure #1 vs. Cure #2 vs. Tender Quick

Cure #2 (Prague Powder #2) starts from the same salt-plus-nitrite base as Cure #1 and adds sodium nitrate. Nitrate does nothing on its own; it breaks down into nitrite slowly, over weeks to months, which is exactly the protection a product like salami, bresaola, or coppa needs while it air-dries at room temperature far longer than bacon ever sits. Put Cure #2 on a batch of bacon and it adds nitrate the cure never has time to use. Put Cure #1 on a months-long dry-cured salami and the nitrite runs out long before the product is safe. The two are not interchangeable, and this site does not offer Cure #2 dosing anywhere, because every calculator here covers short, refrigerated cures.

Morton Tender Quick is a third, separate product: about 0.5% sodium nitrite and 0.5% sodium nitrate in a salt-and-sugar base, dosed by Morton's own direction of 1 tablespoon per pound of meat rather than by the 0.25% rule Cure #1 uses. It is not a drop-in substitute for Cure #1 measured the same way; the bacon curing calculator supports it as a separate option with its own dose, for exactly this reason.

How much Cure #1 to use

The rate does not change with the cut: 0.25% of the meat's weight, which works out to 156 ppm ingoing sodium nitrite every time, whether the meat is a quarter pound or a 25 lb batch. Below is that same rate shown at a few common weights, so you can sanity-check a dose before you weigh it. These are the identical figures the bacon curing calculator returns; if a number here and a number there ever disagree, the calculator's live result is the one to trust and this table has a bug.

Meat weight	Cure #1, 0.25%	Ingoing nitrite
1 lb of meat	1.13 g	156 ppm
2 lb of meat	2.3 g	156 ppm
5 lb of meat	5.7 g	156 ppm
10 lb of meat	11.3 g	156 ppm
500 g of meat	1.3 g	156 ppm
1 kg of meat	2.5 g	156 ppm
2.5 kg of meat	6.3 g	156 ppm
5 kg of meat	12.5 g	156 ppm

A level teaspoon of Cure #1 is about 6 g, roughly enough for 5.3 lb (2.4 kg) of meat, but weigh it on a gram scale rather than relying on the spoon; a teaspoon of a fine, dense powder varies enough between brands to matter at this dose.

Weigh your actual cut. Open the bacon curing calculator, enter the weight and thickness, and it returns the Cure #1, salt, and sugar in grams together, plus the days to cure and the ppm check against the federal limit, for a dry or a wet cure.

Nitrite ppm limits, and why they exist

Two federal ceilings apply to a home-cured product. USDA's meat inspection regulations, 9 CFR 424.22(b), cap ingoing sodium nitrite at 200 ppm for dry-cured bacon and at 120 ppm for pumped or immersion-cured bacon; the lower figure applies when the cure is injected or the product soaks in a brine rather than being dry-rubbed. Separately, FDA's food-additive regulation for sodium nitrite, 21 CFR 172.175, sets a 200 ppm ceiling specifically for home meat-curing preparations and requires any such product sold to consumers to carry a Keep out of the reach of children warning on the label. The standard 0.25% Cure #1 dose lands at 156 ppm, comfortably inside both limits with margin for measuring error.

The limits exist because of Clostridium botulinum, the bacterium behind botulism, a rare but severe form of food poisoning caused by a toxin the organism produces as it grows. Its spores are common in the environment and can survive cooking; what stops them from growing out and producing toxin in a cured product is a combination of salt, refrigeration, and nitrite. Nitrite's role matters most for products that are cold-smoked or otherwise held for hours in temperatures the organism can grow at, which is why every cold-smoking step on this site assumes the product was cured with nitrite first. A properly weighed dose is high enough to do that job and, by design, far below the ppm level the regulations treat as a food-additive ceiling.

How long different cuts take to cure

For any cut cured Cure #1's way, dry and refrigerated, the rule is about 7 days per inch of thickness at the thickest point, with a 7-day floor and a 21-day ceiling. A 2-inch pork belly (bacon) cures for 14 days; a thinner 1-inch cut still gets the full 7-day floor, because the cure needs time to reach the center regardless of how thin the piece is. The same day count applies whether the cut is pork belly for bacon, pork loin for Canadian bacon, pork jowl, or pork shoulder for cottage bacon; only the thickness changes, not the percentage of salt or Cure #1.

A wet cure, where the meat sits submerged in a brine at around 40% water by the meat's weight, moves faster because the cure surrounds the meat instead of working in from one exposed surface: 3 to 7 days depending on thickness, using the same 3-days-per-inch pattern with a 3-day floor and a 7-day ceiling.

Longer dry cures, salami, bresaola, and other products made with Cure #2, run for weeks to months under controlled temperature and humidity rather than a plain refrigerator, and are outside what this guide or this site's calculators cover; that is a different process with its own equipment and its own safety margins, not a longer version of the bacon method.

Overcuring and undercuring

Undercuring is the more dangerous failure. A cure that has not had enough time to reach the center of a thick cut, or a batch made with too little Cure #1 for the weight, can leave the interior without the nitrite protection the product needs, particularly for anything that will be cold-smoked. Visually, undercured meat often shows gray, uncured patches in the center when sliced, rather than the even pink of a fully cured piece; that gray core is a sign to treat the batch as improperly cured, not a purely cosmetic issue.

Overcuring, going past the time ceiling or the salt percentage, is mainly a quality problem rather than an acute safety one within this site's presets: the meat gets saltier and firmer the longer it sits past the point the cure has fully equilibrated, since an equilibrium cure (below) cannot exceed the percentage of salt you weighed out. The exception is dosing, not time: adding extra Cure #1 "to be safe" pushes the ppm over the regulatory limit and does not add any additional protection, since the 156 ppm standard dose was already set with margin built in. More Cure #1 is not a safety upgrade; it is an overdose.

Equilibrium curing vs. the percentage-of-water method

Equilibrium curing sets salt, sugar, and Cure #1 as a percentage of the meat's own weight, dry-rubbed or dissolved into a measured amount of water, rather than as a percentage of a large volume of brine. Because the meat can only take up the salt you actually put on it, an equilibrium cure at 2.5% salt cannot come out saltier than 2.5%, whatever happens if the batch sits a few days past its target time. There is no rinse step required to correct for oversalting, though rinsing before drying is still standard practice for texture. This is the method the bacon curing calculator uses, and it is the same principle behind the equilibrium brine calculator for wet brines generally.

The older, still common method treats the cure as a percentage of the water in a large brine the meat soaks in, closer to how a turkey brine works. It is faster to mix and forgiving of imprecise meat weight, but the final saltiness depends on how long the meat soaks and how much of the brine's salt actually diffuses in, so a batch left too long or too briefly comes out over- or under-seasoned even with the same brine recipe. For nitrite specifically, that soak-time dependence is also why USDA sets a lower ppm ceiling, 120 ppm rather than 200 ppm, for pumped and immersion-cured bacon: more of the ingoing nitrite in a soak method tends to end up in the finished product than in a dry rub.

What you'll need

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Gram scale accurate to 0.1 g. A 1 kg batch takes 2.5 g of Cure #1; a kitchen scale that only reads whole grams cannot measure that dose accurately, and this is the one tool on this list that is not optional.
Cure #1 (Prague Powder #1, Insta Cure #1, or DQ Curing Salt), bought in its own labeled container and never decanted into an unlabeled one.
A second, separate container for table or kosher salt, stored well away from the Cure #1 so the two are never picked up by mistake.
Vacuum-seal bags or zip bags large enough for the cut to lie flat while it cures in the refrigerator.
Instant-read thermometer, both for checking the refrigerator holds 36 to 40°F (2 to 4°C) and for the finished internal temperature once the product is cooked.

Safety

Weigh Cure #1 on a gram scale. The standard dose is 0.25% of meat weight; guessing by spoon or by eye is how a cure ends up outside the ppm limit in either direction.
Never substitute pink Himalayan salt for Cure #1, or the reverse. They look similar and do entirely different jobs; see the section above.
Never eat curing salt directly, and never use it as a table-salt substitute. At curing doses, weighed against meat, it is safe; consumed directly or used at seasoning volumes, sodium nitrite is acutely toxic, and it is legally required to carry a child-safety warning for exactly that reason (21 CFR 172.175).
Store it labeled, sealed, and out of reach of children and pets. Keep it physically separate from ordinary salt in the kitchen.
Hold the meat at 36 to 40°F (2 to 4°C) for the entire cure. Nitrite and refrigeration work together; neither one substitutes for the other.
Do not cold-smoke or extend the hold time of anything that was not cured with nitrite. That combination of warm, low-oxygen conditions is exactly what Clostridium botulinum spores need to grow.
If curing salt is ever ingested outside of a properly cured, cooked product, treat it as a poisoning emergency and seek medical attention or contact poison control immediately; do not wait to see if symptoms appear.

How this page is checked

This guide was written by Cedrick Reese for BrineCalculators.com. Every ppm figure and every percentage on this page is cross-checked against the live constants inside bacon-curing-calculator.html's own script, the 0.25% dose, the 156 ppm result, the 200 ppm and 120 ppm federal ceilings, and the day formulas for dry and wet cures, so the two pages cannot disagree; if either page is ever updated, both are checked against the other before anything ships. The regulatory figures themselves are quoted from the current text of 9 CFR 424.22(b) and 21 CFR 172.175 on eCFR, not copied from a secondary source, and the botulism-control background is drawn from the peer-reviewed review article and the USDA and NCHFP resources linked below.

The regulations are the fixed point: if either CFR section changes, the ppm figures on this page and on the bacon curing calculator change with them. This page carries no dosing calculator of its own by design, so there is exactly one place on the site where the math is computed, the bacon curing calculator, and every other page including this one points to it rather than duplicating it. Anything on this page that disagrees with the current eCFR text, or with the bacon curing calculator's live result, is a bug; use the contact page to report it.

Frequently asked questions

What is Cure #1?

Cure #1, also sold as Prague Powder #1, Insta Cure #1, or DQ Curing Salt, is a mix of table salt and 6.25% sodium nitrite, dyed pink so it is never mistaken for plain salt. It is the curing salt used for products that are cooked or smoked within a few weeks, bacon, ham, corned beef, pastrami, and most sausage. At the standard home dose of 0.25% of the meat's weight it delivers 156 ppm ingoing sodium nitrite, inside the 200 ppm limit 9 CFR 424.22(b) sets for dry-cured bacon and the 200 ppm ceiling 21 CFR 172.175 sets for home meat-curing preparations generally. The full dosing calculator for this is the bacon curing calculator.

Is pink curing salt the same as pink Himalayan salt?

No, and mixing them up is a real safety hazard, not just a labeling mix-up. Pink Himalayan salt is plain sodium chloride with trace minerals that happen to tint it pink; it has no nitrite and cures nothing. Cure #1 is dyed pink on purpose, specifically so a cook reaching for salt does not grab it by mistake, and the dye is not a sign of any mineral content. Using Himalayan salt in a cure gives no nitrite protection at all, which matters for cold-smoked or long-holding products. Using Cure #1 in place of table salt at a 1:1 ratio massively overdoses the nitrite. Keep the two salts in different containers, both clearly labeled.

How much Cure #1 per pound of meat?

1.13 g per pound (2.5 g per kilogram) for a standard dry cure, which is 0.25% of the meat's weight and works out to 156 ppm ingoing sodium nitrite. A level teaspoon of Cure #1 is about 6 g, which covers roughly 5.3 lb (2.4 kg). Because the dose per pound is so small, weigh it on a scale that reads to 0.1 g rather than measuring by spoon; the bacon curing calculator does this math for any weight and thickness.

What happens if you use too much curing salt?

Two different problems, at two different scales. Go modestly over the ppm target, say by using a heaping spoon instead of a weighed dose, and the meat is over the regulatory limit and tastes metallic or overly cured, without being an acute health emergency. Go far over, treating Cure #1 like table salt or eating it directly, and sodium nitrite is acutely toxic: it oxidizes hemoglobin into a form that cannot carry oxygen (methemoglobinemia), and a large enough dose is a medical emergency. That gap between a normal curing dose and a dangerous one is exactly why the product is weighed in grams, dyed pink, and required by 21 CFR 172.175 to carry a Keep out of the reach of children warning on any home-curing preparation. Never eat curing salt directly and never guess at the amount.

Can you cure meat without Cure #1?

You can salt-cure meat without nitrite, but it will be gray rather than pink, taste like salt pork rather than bacon or ham, and it loses nitrite's specific protection against Clostridium botulinum, the organism that matters most once a product is smoked or held warm for any length of time. Commercial products labeled uncured or no nitrates added still get their nitrite from celery powder, which converts to nitrite through fermentation; the home version is celery juice powder at roughly 0.2 to 0.4% of meat weight, but its nitrite content varies by product, so it cannot be checked against a ppm limit the way Cure #1 can. For anything that will be cold smoked, Cure #1 is not optional.

What's the difference between Cure #1 and Cure #2?

Cure #1 (Prague Powder #1) is salt plus 6.25% sodium nitrite, for short cures under about 30 days that are cooked or smoked, bacon, ham, corned beef, sausage. Cure #2 (Prague Powder #2) adds sodium nitrate to that mix; the nitrate breaks down into nitrite slowly over weeks to months, so it keeps protecting a product like salami or bresaola that dries at room temperature for far longer than bacon ever sits. Using Cure #2 on bacon adds nitrate the product does not need in the time it has; using Cure #1 on a months-long dry-cured salami runs out of nitrite partway through. They are not interchangeable.

How long does bacon need to cure?

For a dry cure, about 7 days per inch of the belly's thickness, with a 7-day floor and a 21-day ceiling, so a 2-inch belly cures for 14 days. A wet cure at around 40% water by weight is faster, 3 to 7 days, because the brine surrounds the meat instead of working in from the surface. The same day count applies to pork loin (Canadian bacon), pork jowl, and pork shoulder cured the same way; only the thickness changes. Curing past the ceiling does not add safety, it only makes the meat saltier.

Is nitrite in cured meat dangerous?

At the ppm levels the regulations allow, and the doses this site's calculators use, no; that is the level nitrite has been regulated to for decades specifically because it is dangerous at much higher doses. The federal limits, 200 ppm ingoing for dry-cured bacon and 120 ppm for pumped or immersion bacon under 9 CFR 424.22(b), and the 200 ppm ceiling 21 CFR 172.175 sets for home curing preparations generally, exist to keep the ingoing dose far below anything that threatens a person eating the finished product, while still being enough to stop Clostridium botulinum from growing. The risk this guide focuses on is a different one: an unweighed or mistaken dose of the raw curing salt itself, not the trace nitrite left in a properly cured, cooked slice of bacon.

What is equilibrium curing?

Equilibrium curing sets salt, sugar, and Cure #1 as a percentage of the meat's weight rather than as a percentage of a brine's water. Because the belly or roast can only absorb the salt you actually put on it, the finished product cannot end up saltier than the percentage chosen, and there is no rinse step to guess at. This is the method the bacon curing calculator and the equilibrium brine calculator both use. The older method, a percentage-of-water brine the meat soaks in and is later rinsed, is faster to build but depends on soak time to hit the right saltiness, so an oversoaked batch comes out too salty and an undersoaked one comes out under-cured.

Where do I store Cure #1, and how long does it keep?

Store it in its original labeled container, sealed, in a cool dry cupboard, away from the table salt and out of reach of children and pets; 21 CFR 172.175 requires that warning on any home-curing preparation sold for this purpose. It does not need refrigeration on its own, but the cured meat made with it does, 36 to 40°F (2 to 4°C) for the whole cure. Cure #1 keeps for a long time as a dry powder; if it clumps hard or the color fades noticeably, weigh a fresh batch rather than guessing whether the dose is still accurate.

References

Disclaimer

Educational content, not certification: this page is educational and informational only. It is not food-safety certification, professional charcuterie training, or a substitute for USDA-verified curing procedures. Reading it does not qualify anyone to judge whether a specific batch of cured meat is safe; that judgment depends on following a verified recipe, weighed doses, and correct refrigeration throughout.

Curing salt warning: curing salts containing sodium nitrite are toxic in quantities beyond a properly weighed curing dose. The pink color exists specifically to keep them from being mistaken for regular salt. Never exceed the amounts a verified recipe or calculator gives you, never consume curing salt directly, and if accidental ingestion occurs, seek medical attention immediately.

Food safety responsibility: home curing carries real risk if the cure, the weight, the time, or the refrigeration is wrong. You are solely responsible for following USDA-verified curing procedures, using a gram scale, sourcing curing salt and meat from reputable suppliers, keeping the product refrigerated at 36 to 40°F (2 to 4°C) throughout the cure, and complying with applicable local food-safety rules.

No warranty: BrineCalculators.com makes no warranties, expressed or implied, regarding the accuracy of the figures on this page, the suitability of this information for any particular purpose, or the safety of any product made using it. We are not liable for any illness, injury, or damages resulting from the use of this page or the information on it. See the full disclaimer.

Consult authoritative sources: if you are new to meat curing, consult USDA FSIS guidance, the National Center for Home Food Preservation, or an experienced charcutier before curing meat at home, and treat the regulatory citations on this page as a starting point for your own reading of the current regulation, not a final word.