Dimethyl dicarbonate

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Dimethyl dicarbonate Specification

Ph Level
Neutral to slightly acidic

Source
Synthetic

Solubility
Soluble in ethanol, partially soluble in water

Application
Preservation for wines, juices, soft drinks

Product Type
Chemical preservative / Additive

Form
Liquid or crystalline solid

Color
Colorless to pale yellow

Weight
Varies; commonly supplied in milliliter units such as 250 ml, 500 ml, or per kg

Shelf Life
1 year under recommended storage

Flavor
Odorless, tasteless

Grade Standard
Industrial Grade / Food Grade

Pack Size
250 ml, 500 ml, 1 L, 5 L, 25 kg

Physical State
Liquid or crystalline solid

Pack Type
Sealed HDPE bottle or drum

Purity
>99%

About Dimethyl dicarbonate

Dimethyl dicarbonate
CAS number [4525-33-1]

Dimethyl dicarbonate or DMDC is a colourless liquid with a sharp odour. Its primary use is as a beverage preservative or sterilant (INS No. 242), and acts by inhibiting the enzymes acetate kinase and L-glutamic acid decarboxylase. It has also been proposed that methoxycarbonylation of the histidine part of the enzymes alcohol dehydrogenase and glyceraldehyde 3-phosphate dehydrogenase by DMDC inhibits these essential enzymes also

DMDC is sometimes used as a preservative in wine as a replacement to sulfur dioxide, inactivating wine spoilage yeasts such as Brettanomyces. In the U.S. the FDA approved its use in wines in 1988, with the maximum permitted level being set at 200 mg/L, and only if there was less than 500 yeast cells/mL at time of dosage. Usage has also been approved in Germany (since 1978) and New Zealand. The application of DMDC is particularly useful when wine needs to be sterilised but cannot be sterile filtered, pasteurized, or sulfured.

DMDC has also been used to sterilise coffee, tea, cider, fruit wine and mead.

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