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HomeProduct name listDimethyl dicarbonate

Dimethyl dicarbonate

Synonym(s):Dimethyl dicarbonate;Dimethyl pyrocarbonate, Pyrocarbonic acid dimethyl ester

  • CAS NO.:4525-33-1
  • Empirical Formula: C4H6O5
  • Molecular Weight: 134.09
  • MDL number: MFCD00008419
  • EINECS: 224-859-8
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-12-18 14:15:30
Dimethyl dicarbonate Structural

What is Dimethyl dicarbonate?

Chemical properties

Dimethyl dicarbonate (DMDC) is a colourless liquid with a slightly pungent aroma. It is primarily used as a beverage preservative, processing aid, or sterilant (Enumber 242). The application of DMDC is particularly useful when wine needs to be sterilized but cannot be sterile filtered, pasteurized, or sulfured. DMDC is also used to stabilize non-alcoholic beverages such as carbonated or non-carbonated juice beverages, isotonic sports beverages, iced teas, and flavored waters.

The Uses of Dimethyl dicarbonate

Dimethyl Dicarbonate(DMDC) is a microbial control agent used in wine; ready-to-drink teas; nonjuice-containing beverages; carbonated,dilute beverages containing juice, fruit flavor or both with the juice content not exceeding 50%.
Dimethyl Dicarbonate has been commonly used as a antimicrobial agent for a broad spectrum of microorganisms. The primary target microorganisms of DMDC are yeasts, including Saccharomyces, Zygosaccharomyces, Rhodotorula, Candida, Pichia, Torulopsis, Torula, Endomyces, Kloeckera and Hansenula. DMDC is also bactericidal to a number of species including Acetobacter pasteurianus, Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, several Lactobacillus species and Pediococcus cerevisiae DMDC has also been shown to be bactericidal against Escherichia coli O157:H7.
The antimicrobial effect of DMDC results from the deactivation of microbial enzymes, mainly through reaction with protein imidazole and amine groups, leading to the destruction of the microorganisms. The remaining unreacted DMDC breaks down rapidly into methanol and carbon dioxide. The DMDC activity is based on the hydrolysis rate. Hydrolysis occurs when DMDC reacts with water and the rate is dependent on the temperature of the beverage or wine. It takes about four hours at 10°C (50°F) or two hours at 20°C (68°F) for DMDC completely breaking down.

What are the applications of Application

Dimethyl dicarbonate is a histidine methylator

Definition

ChEBI: Velcorin is an organooxygen compound. It is functionally related to a carbonic acid.

Purification Methods

Dissolve it in Et2O, shake this with a small volume of 0.1N HCl, dry Et2O with Na2SO4 and distil in in vacuo below 100o to give a clear liquid. It decomposes to CO2 and dimethyl carbonate on heating at 123-149o. It is readily hydrolysed by H2O and is a yeast inhibitor and an IRRITANT. [Brysov et al. J Org Chem USSR 10 2551 1974, Boehm & Mehta Chem Ber 71 1797 1938, Beilstein 3 IV 17.]

Properties of Dimethyl dicarbonate

Melting point: 15-17°C
Boiling point: 45-46 °C5 mm Hg(lit.)
Density  1.25 g/mL at 25 °C(lit.)
vapor pressure  0.7 hPa (20 °C)
refractive index  n20/D 1.392(lit.)
Flash point: 80 °C
storage temp.  Store below +30°C.
solubility  35g/l (decomposition)
form  Oil
color  Colourless
explosive limit 3-29.9%(V)
BRN  956715
Stability: Moisture Sensitive
EPA Substance Registry System Dicarbonic acid, dimethyl ester (4525-33-1)

Safety information for Dimethyl dicarbonate

Signal word Danger
Pictogram(s)
ghs
Corrosion
Corrosives
GHS05
ghs
Skull and Crossbones
Acute Toxicity
GHS06
GHS Hazard Statements H302:Acute toxicity,oral
H314:Skin corrosion/irritation
H330:Acute toxicity,inhalation
Precautionary Statement Codes P260:Do not breathe dust/fume/gas/mist/vapours/spray.
P280:Wear protective gloves/protective clothing/eye protection/face protection.
P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.
P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Computed Descriptors for Dimethyl dicarbonate

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