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Quick Details

  • CAS No.: 431-03-8
  • Other Names: 2,3-dioxobutane; dimethyl diketone
  • MF: C4H6O2
  • EINECS No.: 207-069-8
  • FEMA No.: 2370
  • Place of Origin: Anhui, China (Mainland)
  • Type: Natural Flavour & Fragrances, Professional manufacturer&supplier
  • Natural Variety: Plant Extract
  • Usage: Daily Flavor, Food Flavor, Industrial Flavor
  • Purity: Above99%
  • Brand Name: Haibei
  • Model Number: HB-N019
  • Product Name: Yellow to yellow green clear liquid Diacetyl natural 431-03-8
  • Molecular Weight: 86.09
  • FDA: 184.1278
  • CoE: 752
  • Appearance: Yellow to yellow green clear liquid
  • Odor: Strong butter sweet creamy pungent caramel
  • Certificate: ISO.COA.MSDS.kosher.halal

Packaging & Delivery

Packaging Details In plastic lining steel drums, net weight 50/200 kilos
Delivery Time Prompt delivery

Diacetyl Natural
Ref No.: HB-N019 
Synonyms:  2,3-dioxobutane; dimethyl diketone
Molecular Formula: C4H6O2  
Molecular Weight: 86.09
CAS No.:431-03-8
Einecs No.:207-069-8

 Appearance:Yellow to yellow green clear liquid
 Odor:Strong butter sweet creamy pungent caramel

Assay (GC): ≥99%
Specific gravity @ 25°C: 0.979 ~ 0.994
Refractive index @ 20°C: 1.393 ~ 1.397
Boiling point (°C): 86 ~ 90
Flash point (°C): 7

Physical and chemical properties

Diacetyl is yellow liquid ; the color of the vapor is similar to chlorine; the odor of the two is of the smell of the fragrance and the smell of butter is diluted.; It can dissolve in water about 4 times and can dissolve with alcohol and ether.. The mixture of diacetyl and phosphoric acid can form a mixed crystal, which can be purified by diacetyl. The crystal water is decomposed into the original components.. Only pure diacetyl was stable. Contains a small amount of impurities, even in the dark stored in sealed tube, will polymerization (see polymerization), the liquid viscosity.Under the action of alkali,  diacetyl is polymerized to two polymers.


Mainly used in the preparation of food flavor, is the main flavor of the cream, but also for milk, cheese and some other flavor. As in the berries, caramel, chocolate, coffee, cherry, sweet vanilla bean, honey, cocoa, fruit, wine, cigarettes, rum, nuts, almonds, ginger and so on. Can also trace for makeup with fresh fruit fragrance or flavor type.


In nature, diacetyl exists widely in many kinds of plant essential oils, such as orris oil, angelica oil, laurel oil is the main component of butter and some other natural products fragrance. The industrial production of diacetyl is with nitrite and methyl ethyl ketone, generating butanone oxime with dilute sulfuric acid, decomposition and. The method of hydration and re oxidization of vinyl acetylene or methyl vinyl ketone. 

Environmental impact

1. Health hazards

Invasive approach: inhalation, ingestion, percutaneous absorption.

Health hazard: stimulating. Can cause nausea, headache and vomiting after exposure..

2. Toxicology and environmental behavior

Acute toxicity: LD501580mg/kg (rat oral)

Dangerous feature: the explosive mixture of its vapor and air form explosive, and can cause a burning explosion in case of fire and high fever.. With the oxidant can react strongly. The vapor is heavier than air and can far at the lower place encounter fire to burn the back diffusion. In case of high fever, increased pressure within the container, cracking and explosion.

Combustion (decomposition) product: carbon monoxide, carbon dioxide.

Laboratory monitoring method

Gas chromatography

Emergency disposal method

First, the leakage of emergency treatment

Evacuate the contaminated area to the safe area, prohibit the personnel from entering the contaminated area and cut off the fire source. It is suggested that emergency treatment personnel wear self-contained breathing apparatus and wear general fire protection clothing. In the case of safety leakage. Spray mist can reduce evaporation, but can not reduce the leakage of flammable in confined space. Use activated carbon or other inert material to absorb, collect to waste disposal place disposal. Can also be washed with plenty of water, diluted by washing water into the wastewater system. Such as a large number of leaks, the dike shelter, then collect, transfer, or harmless treatment of waste recycling.

Two, protective measures

Respiratory system protection: high concentration of the environment, wearing a gas mask.

Eye protection: wearing chemical safety glasses when necessary.

Body protection: wear the appropriate work clothes.

Hand protection: wearing protective gloves.

Other: smoking is prohibited in the workplace. Pay attention to personal hygiene. To avoid long-term repeated contact.

Three, first aid measures

Skin contact: remove the contaminated clothing, rinse with the flow of water.

Eyes contact: immediately lift the eyelids, with large flow of water rinse thoroughly.

Inhalation: quickly from the scene to the fresh air. Maintain respiratory tract patency. Artificial respiration when necessary. Medical treatment.

Ingestion: coverage to drink plenty of warm water, vomiting. Medical treatment.

Fire suppression method: foam, dry powder, carbon dioxide, sand. Invalid water use.

Standard packing:In plastic lining steel drums, net weight 50 kilos.
Storage:At cool place (below 25°C), in unopened packing.

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