How long is sodium metabisulfite good for?

Shelf Life: Nominally 36 months when properly stored in original packaging. Storage Conditions: Controlled indoor environment that is cool, dry, and well ventilated.

What is the shelf life of potassium metabisulfite?

When stored at a maximum temperature of 25 °C and a maximum relative humidity of 45%, the shelf life is 6 months.

Do you need to rinse after sodium metabisulphite?

Drain solution out of equipment but do not rinse or dry before using. Use immediately once sterilised.

How do you store sodium metabisulfite?

* Store in tightly closed containers in a cool, well-ventilated area away from COMBUSTIBLE MATERIALS (such as WOOD, PAPER and OILS). * Immediately flush with large amounts of water for at least 15 minutes, occasionally lifting upper and lower lids.

What is sodium metabisulfite used for in winemaking?

Sodium Metabisulfite is a common additive used to preserve and stabilize wines, ciders, and occasionally beers. When added to wine or must, it forms sulfur dioxide gas (SO2). This prevents most wild microorganisms from growing and acts as a potent antioxidant, protecting both the color and delicate flavors of wine.

Sodium Metabisulphite

How much metabisulfite do I add to wine?

Product details. Potassium metabisulfite is one of the most important winemaking compounds. It is an antioxidant and bactericide that releases sulfur dioxide into wine must. Use 1/4 teaspoon per five gallons to add 50 ppm.

Will sodium metabisulfite stop fermentation?

Eventually, the wine yeast will begin to die, but not all at once. Some yeast will live longer than others always leaving a possibility of a re-fermentation occurring, even months down the road. Sulfites, like the Campden tablets and sodium metabisulfite, will destroy some of the yeast cells but not all of them.

What happens when you mix sodium metabisulfite with water?

It is known that sodium metabisulfite can react with acids and water, releasing toxic sulfur dioxide (SO2) gas.

How toxic is sodium metabisulfite?

Sodium metabisulfite appears as a white crystalline or powder solid with a slight sulfur odor. Toxic by inhalation . Strongly irritates skin and tissue. Noncombustible, but may decompose to emit toxic oxide fumes of sulfur and sodium when heated to high temperature.

Is metabisulfite a carcinogen?

Repeated or prolonged exposures may cause sore throat or nosebleeds. Inhalation may also cause severe respiratory reactions and aggravate asthma or other breathing diseases. throat, nausea, vomiting and diarrhea. classified sodium metabisulfite as a carcinogen (cancer causing).

Can you sanitize with sodium metabisulfite?

Uses: Sodium Metabisulphite (AKA sulphite) is a white crystalline powder which mixes with water to form a sanitizing solution. It is the most widely used sanitizer in home-winemaking. Sulfites have been utilized in winemaking for hundreds of years.

How do you make sodium metabisulfite solution?

Weigh out 2.5 g of sodium metabisulfite. In a 150-ml acid-washed beaker, dissolve the sample in 100 ml of deionized distilled water. Under a hood, acidify the solution with concentrated HNO₃ to a pH of less than 2. Gently heat the solution to reduce the volume below 100 ml, making certain that it does not boil.

Is sodium metabisulfite the same as potassium metabisulfite?

The only difference between sodium metabisulfite and potassium metabisulfite is that they will leave a residual trace of either sodium or potassium. Some brewers prefer potassium metabisulfite as they deem it to have a more neutral flavour, the amounts being used however are very small so I tend not to worry.

How do you test for potassium metabisulfite?

The ultimate way to know the strength of your potassium metabisulfite is to test it with an SO2 testing kit. By doing this you can know the exact strength of your sulfite.

Is potassium metabisulfite harmful?

Potassium Metabisulfite

Some potential dangers associated with exposure to this substance include severe burning and damage to your eyes, irritation and reddening of your skin and difficulty breathing. If exposed to the raw, unprocessed form of potassium metabisulfite, you should immediately seek medical attention.

How do you test the purity of sodium metabisulfite?

METHOD OF ASSAY

Weigh 0.2 g of the sample to the nearest mg, add to 50.0 ml of 0.1 N iodine in a glass-stoppered flask, and stopper the flask. Allow to stand for 5 min, add 1 ml of hydrochloric acid, and titrate the excess iodine with 0.1 N sodium thiosulfate, adding starch TS as the indicator.

What is the difference between sodium bisulfite and sodium metabisulfite?

The key difference between sodium bisulfite and sodium metabisulfite is that the sodium bisulfite has only one sulfur atom and three oxygens, and the bisulfite anion is monovalent whereas, the sodium metabisulfite has two sulfur atoms, five oxygens, and the anion is divalent.

What is another name for sodium metabisulfite?

Sodium metabisulfite, also known as sodium pyrosulfite, is an inorganic compound with the chemical formula Na2S2O5. The IUPAC spelling of the compound is sodium metabisulphite or sodium pyrosulphite.

Can you add too much potassium metabisulfite to wine?

As doses of potassium metabisulfite or Campden tablets are added throughout the wine making process, the amount of bound sulfite builds up. If it builds up too much you can actually taste it in the wine.

How do you use sodium metabisulfite in beer?

AT BOTTLING TIME: Add 1/16 teaspoon per each gallon of beer or wine to preserve its color and flavor. Pre-dissolve in a small amount of the wine first. Potassium Sorbate is also recommended at this time to eliminate re-fermentation. Bottle immediately after adding.

How do you stabilize wine without chemicals?

Add 1/4 teaspoon of potassium metabisulfite AND 3.75 teaspoons of potassium sorbate (also called Sorbistat-K) into that water; stir until fully dissolved. Both powders should dissolve into pure, clear liquid. Gently add this water/liquid into your five gallons of wine and stir gently for about a minute.

How often do you add potassium metabisulfite to wine?

Adding potassium metabisulfite:

After Alcoholic Fermentation Has Completed: Add 0-10ppm SO2 if you are planning to perform a Malolactic Fermentation. If you are not planning to perform Malolactic Fermentation, move on to 3. 3. After Malolactic Fermentation and Prior to Aging: Add 50-75ppm SO2.

How do you naturally clear homemade wine?

Add 4 ounces of denatured alcohol to 1 ounce of wine in a test jar and look for stringy clots to form, indicating there is long chain pectin left. 1 teaspoon of pectin enzyme in 6 gallons should clear this up in the finished wine.

What do you add to homemade wine before bottling?

Wine is stabilized to stop fermentation so that remaining yeast do not ferment added or residual sugar after bottling and cause the bottles to explode. After stabilizing, suspended yeast die off and lay down a thin layer of lees.