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Product FOB Price Min.Order Supply Ability Supplier
2,3-Butanedione manufacture
Cas No: 431-03-8
USD $ 3.0-3.0 / Kilogram 1 Kilogram 1-50 Metric Ton/Month Hangzhou ZeErRui Chemical Co., Ltd. Contact Supplier
2,3-Butanedione Manufacturer/High quality/Best price/In stock
Cas No: 431-03-8
USD $ 3.0-3.0 / Kilogram 1 Kilogram 1-100 Metric Ton/Month Dayang Chem (Hangzhou) Co.,Ltd. Contact Supplier
High quality 2.3-Butanedione supplier in China
Cas No: 431-03-8
No Data 1 Kilogram 30 Metric Ton/Month Simagchem Corporation Contact Supplier
Cas No: 431-03-8
USD $ 5520.0-6000.0 / Metric Ton 1 Metric Ton 10 Metric Ton/Month Hebei yanxi chemical co.,LTD. Contact Supplier
2,3-Butanedione CAS NO#431-03-8
Cas No: 431-03-8
No Data 180 Kilogram 10000 Metric Ton/Year Hefei TNJ chemical industry co.,ltd Contact Supplier
Cas No: 431-03-8
No Data 1 Kilogram 20 Metric Ton/Week Henan Allgreen Chemical Co.,Ltd Contact Supplier
Cas No: 431-03-8
USD $ 2.0-3.0 / Kilogram 1 Kilogram 50 Metric Ton/Day EAST CHEMSOURCES LIMITED Contact Supplier
2.3- Butanedione
Cas No: 431-03-8
No Data 23 Metric Ton 3000 Kilogram/Month ORCHID CHEMICAL SUPPLIES LTD Contact Supplier
Amadis Chemical offer CAS#431-03-8;CAT#A826155
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No Data 10 Milligram Amadis Chemical Co., Ltd. Contact Supplier
Cas No: 431-03-8
No Data No Data No Data Chemwill Asia Co., Ltd. Contact Supplier

431-03-8 Usage


In nature, Diacetyl exists widely in many Plant essential oils, such as iris oil, angelica oil, laurel oil, etc. It is the main component of butter and other natural products fragrance.
In industry, methyl ethyl ketone was treated with nitrite acid to generate diacetylmonoxime. Diacetylmonoxime is then decomposed by sulfuric acid to produce Butanedione.
Diacetyl can be obtained by chemical ionization method from high content of essential oil. Two parts of phosphoric acid were added to one part of essential oil to
produce crystalline adduct CH3CO-COCH3. Butanedione was released after the addition of water. Excessive addition of phosphoric acid will lead to liquid adduct product.
Diacetyl can be obtained by special fermentation of glucose.
Diacetyl can be synthesized using methyl ethyl ketone as raw material.
Diacetyl was oxidized by sodium nitrite in the presence of hydrochloric acid,
Then, the process of istillation is carried out after hydrolysis in the presence of sulfuric acid to produce Butanedione.


Ventilated and dry warehouse with low temperature. Separated from oxidant, acid.

Reactivity Profile

2,3-Butanedione is a flammable liquid, b.p. 88° C, moderately toxic. When heated to decomposition 2,3-Butanedione emits acrid smoke and fumes [Sax, 9th ed., 1996, p. 544].

Content analysis

The content of 2,3-Butanedione is analyzed according to method 1(hydroxylamine method) of the aldehyde and ketone analyzing methods (OT-7). The sample weight is 500mg. The equivalent factor (e) in calculation is 21.52 .It is Fit to be analyzed using nonpolar column in GT-10-4.

Health Hazard

Inhalation or contact with material may irritate or burn skin and eyes. Fire may produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or suffocation. Runoff from fire control may cause pollution.


It meets GB 2760—1996 standards of edible spices for the moment. It is mainly used for the preparation of food essence like cream, cheese fermentation and coffee typed essence,used in milk, butter, margarine, cheese, sweets and other flavors, such as berry, caramel, chocolate, coffee, cherry, vanilla bean, honey, cocoa, fruit, wine, aroma, rum, nuts, almonds, ginger and so on. It can also be used in fresh fruit fragrance essence for makeup or new type essence in trace amount, and be used as gelatin hardening agent and photographic adhesive agent.

Air & Water Reactions

Highly flammable. Soluble in water.

Stimulus data

Skin-rabbit 500 mg/24h middle

Purification Methods

Dry biacetyl over anhydrous CaSO4, CaCl2 or MgSO4, then distil it in a vacuum under nitrogen, taking the middle fraction and storing it at Dry-Ice temperature in the dark (to prevent polymerization). [Beilstein 1 IV 3644.]

Acute toxicity

Oral-rat  LD50: 1580mg/kg, oral-mice: 250 mg/kg

Quantity restrictions

FEMA(mg/kg): FEMA(mg/kg):soft drinks 2.5;cold drinks 5.9;sweets 21;bakery products44; puddings 19;chewing gum 35;shortening 11.

Chemical Properties

liquid with a butter-like odour

General Description

A clear colorless liquid with a strong chlorine-like odor. Flash point 80°F. Less dense than water. Vapors heavier than air.


Carrier of aroma of butter, vinegar, coffee, and other foods.


Inactivates aminopeptidase-N.1 Cyclocondensation with amines has been used to form triazine2 and pteridine ring systems.3 Also used as a precursor to α-diones.4


Not specified by ADI (FAO/WHO,1994)

Fire Hazard

HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water.


ChEBI: An alpha-diketone that is butane substituted by oxo groups at positions 2 and 3. It is a metabolite produced during the malolactic fermentation.

Flammability and Hazardous characteristics

Flammable in case of fire, high temperature and oxidant, Combustion produces irritating smoke.

Chemical Properties

Yellow to yellow green liquid, a creamy fragrance after bulk dilution (1mg/kg), high vapor pressure is, evaporate quickly at room temperature, melting point-3~-4℃, boiling point 87~88℃, flash point 13℃. Soluble in ethanol, ether, most non-volatile oil and propylene glycol, soluble in glycerin and water, insoluble in mineral oil. Natural products exist in laurel oil, ajawa oil, angelica root oil, raspberry, strawberry, cream, Wine etc. Because it is volatile, it only exists in in the primary distillate and distilled water. 


flammable liquid

431-03-8 Well-known Company Product Price

Brand (Code)Product description CAS number Packaging Price Detail
Sigma-Aldrich (11038)  2,3-Butanedione  analytical standard 431-03-8 11038-5ML-F 993.33CNY Detail
Sigma-Aldrich (11038)  2,3-Butanedione  analytical standard 431-03-8 11038-1ML-F 255.06CNY Detail
Alfa Aesar (A14217)  2,3-Butanedione, 99%    431-03-8 500g 1040.0CNY Detail
Alfa Aesar (A14217)  2,3-Butanedione, 99%    431-03-8 100g 321.0CNY Detail
Alfa Aesar (A14217)  2,3-Butanedione, 99%    431-03-8 10g 211.0CNY Detail
TCI America (B0682)  Diacetyl  >98.0%(GC) 431-03-8 500mL 624.00CNY Detail
TCI America (B0682)  Diacetyl  >98.0%(GC) 431-03-8 100mL 300.00CNY Detail
TCI America (B0682)  Diacetyl  >98.0%(GC) 431-03-8 25mL 198.00CNY Detail



According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 11, 2017

Revision Date: Aug 11, 2017


1.1 GHS Product identifier

Product name butane-2,3-dione

1.2 Other means of identification

Product number -
Other names 2,3-Butanedione

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only. Food additives -> Flavoring Agents
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:431-03-8 SDS

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