Dimethyl dicarbonate
Dimethyl dicarbonate (CAS 4525-33-1), with the linear formula (CH3OCO)2O and a molecular weight of 134.09 g/mol, is a chemical compound used as an antimicrobial agent. It is notably effective in producing pathogen-free apple cider and inhibiting yeast in wine before bottling. This compound serves as a valuable building block in organic synthesis.
- IUPAC
- DMPC,Dimethyl pyrocarbonate,Pyrocarbonic acid dimethyl ester
- Synonyms
- DMPCDimethyl pyrocarbonatePyrocarbonic acid dimethyl ester

Antimicrobial Agent in Food Production
Dimethyl dicarbonate acts as an effective antimicrobial agent, particularly in the production of apple cider, ensuring it is free from pathogens. Its application helps maintain product safety and quality.
Yeast Inhibitor in Winemaking
This compound is utilised to control yeast populations in wine prior to bottling. It effectively inhibits yeast activity without affecting acetogenic bacteria, preserving the wine's intended characteristics.
Organic Synthesis Intermediate
As a carbonyl compound, Dimethyl dicarbonate serves as a useful organic building block in various chemical synthesis applications. Its reactive nature makes it valuable for introducing specific functional groups.
| Molecular weight | 134.09 |
|---|---|
| Linear formula | (CH3OCO)2O |
| Assay | ≥97.0% (T) |
| Boiling point | 45-46 °C/5 mmHg(lit.) |
| Density | 1.25 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.392(lit.)n20/D 1.393 |
| Storage temperature | room temp |
| Application | Antimicrobial agent effective for producing pathogen-free apple cider.1 Also useful for killing yeast (but not acetogenic bacteria) in wine before bottling.2 |


Hazard statements
- H302Harmful if swallowed
- H314Causes severe skin burns and eye damage
- H330Fatal if inhaled
Precautionary statements
- P260Do not breathe dust, fume, gas, mist, vapours or spray
- P280Wear protective gloves, clothing and eye/face protection
- P284Wear respiratory protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Faceshields, full-face respirator (US), Gloves, Goggles, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 80 °C / 176 °F |
| Transport (UN / ADR) | UN 2927 6.1/PG 2 |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | T |
| Risk statements (R) | 21/22-23-34 |
| Safety statements (S) | 18-26-28-36/37/39-38-45 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Shelf Life | (limited shelf life, expiry date on the label) |
|---|
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Dimethyl dicarbonate used for?
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Dimethyl dicarbonate (CAS 4525-33-1) is primarily used as an antimicrobial agent, notably for producing pathogen-free apple cider and for inhibiting yeast in wine before bottling. It also functions as an organic building block in chemical synthesis.
What is the CAS number and formula for Dimethyl dicarbonate?
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The CAS number for Dimethyl dicarbonate is 4525-33-1, and its linear formula is (CH3OCO)2O.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Dimethyl dicarbonate with an assay of ≥97.0% (T). This product is not represented as USP, BP, or EP grade.
How should Dimethyl dicarbonate be handled safely?
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Dimethyl dicarbonate is a dangerous substance (Danger) that can cause severe skin burns and eye damage (H314), is harmful if swallowed and in contact with skin (H302 + H312), and is fatal if inhaled (H330). Appropriate personal protective equipment, including face shields, gloves, goggles, and suitable respirators (e.g., type ABEK), must be used. Handle in a well-ventilated area and seek immediate medical attention in case of exposure.
Is Dimethyl dicarbonate a controlled substance?
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The provided data does not indicate that Dimethyl dicarbonate is a controlled substance.
How is Dimethyl dicarbonate packed, shipped, or exported?
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Dimethyl dicarbonate is shipped under UN 2927, Class 6.1/PG 2. Specific packaging and export details are available upon request, adhering to all relevant shipping regulations.
How can I request a sample or quote for Dimethyl dicarbonate?
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To request a sample or a quote for Dimethyl dicarbonate, please contact our sales team through the website or by phone, providing your specific requirements and contact information.
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