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2,3-Butanedione

2,3-Butanedione

CAS: 431-03-8

Molecular Formula: C4H6O2

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2,3-Butanedione - Names and Identifiers

Name 2,3-Butanedione
Synonyms Diacetyl
Biacetyl
DIACETYLE
Butandione
2,3-Buranedione
2,3-Butanedione
butane-2,3-dione
DiacetylForSynthesis
diacetyl,2,3-butanedione
Diacetyl, Butane-2,3-dione
2,3-BUTANEDIONE, SYNTHETIC
CAS 431-03-8
EINECS 207-069-8
InChI InChI=1/C4H6O2/c1-3(5)4(2)6/h1-2H3
InChIKey QSJXEFYPDANLFS-UHFFFAOYSA-N

2,3-Butanedione - Physico-chemical Properties

Molecular FormulaC4H6O2
Molar Mass86.09
Density0.985g/mLat 20°C
Melting Point-4--2 °C
Boling Point88°C(lit.)
Flash Point45°F
JECFA Number408
Water Solubility200 g/L (20 ºC)
Solubility 200g/l
Vapor Presure52.2 mm Hg ( 20 °C)
Vapor Density3 (vs air)
AppearanceLiquid
ColorClear yellow
Exposure LimitACGIH: TWA 0.01 ppm; STEL 0.02 ppmNIOSH: TWA 5 ppb; STEL 25 ppb
Merck14,2966
BRN605398
Storage ConditionStore at +2°C to +8°C.
StabilityStable. Flammable. Incompatible with acids, strong bases, metals, reducing agents, oxidizing agents. Protect from moisture and water. Note low flashpoint.
Explosive Limit2.4-13.0%(V)
Refractive Indexn20/D 1.394(lit.)
Physical and Chemical PropertiesDensity 0.981
boiling point 88°C
refractive index 1.391-1.399
flash point 7°C
water-soluble 200g/L (20°C)
UseUsed for the preparation of cream flavor, is the main raw material for the production of pyrazine flavor

2,3-Butanedione - Risk and Safety

Risk CodesR11 - Highly Flammable
R20/22 - Harmful by inhalation and if swallowed.
R38 - Irritating to the skin
R41 - Risk of serious damage to eyes
R36/38 - Irritating to eyes and skin.
R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed.
R37/38 - Irritating to respiratory system and skin.
Safety DescriptionS9 - Keep container in a well-ventilated place.
S16 - Keep away from sources of ignition.
S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S37/39 - Wear suitable gloves and eye/face protection
S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection.
S39 - Wear eye / face protection.
UN IDsUN 2346 3/PG 2
WGK Germany2
RTECSEK2625000
FLUKA BRAND F CODES13
TSCAYes
HS Code29141990
Hazard Class3
Packing GroupII
ToxicityLD50 orally in rats: 1580 mg/kg (Jenner)

2,3-Butanedione - Upstream Downstream Industry

Raw Materials2-Butanone
Sulfuric acid
Sulfuric acid
Sodium nitrite
Ethyl Alcohol

2,3-Butanedione - Reference Information

FEMA2370 | DIACETYL
olfactory threshold (Odor Threshold)0.00005ppm
NIST chemical information Information provided by: webbook.nist.gov (external link)
EPA chemical information Information provided by: ofmpub.epa.gov (external link)
traits slightly green and yellow liquid with strong smell
properties strong cream fragrance, fermented fragrance, milk fat fragrance, sweet fragrance, etc.
use is used to prepare cream essence and is the main raw material for the production of pyrazine spices. It is mainly used to prepare food essence, is the main flavor of cream essence, and can also be used in milk, cheese and other fragrances. Such as berries, caramel, chocolate, coffee, cherries, vanilla beans, honey, cocoa, fruity, bouquet, smoke, rum, nuts, almonds, ginger, etc.
GB 2760-96 stipulates that it is temporarily allowed to use edible spices. Mainly used to prepare cream, cheese fermentation flavor and coffee and other flavors.
It is used to prepare cream essence and is the main raw material for the production of pyrazine spices
It is mainly used to prepare food flavors. It is the main flavor of cream essence and can also be used in milk, cheese and other fragrances. Such as berries, caramel, chocolate, coffee, cherries, vanilla beans, honey, cocoa, fruity, bouquet, smoke, rum, nuts, almonds, ginger, etc. It can also be used in trace amounts in fresh fruit flavors or new flavors for makeup.
It is used to prepare various milk-flavored flavors. It is a flavorant for cream, margarine, dry cool and candy. Also used as gelatin hardener, photographic binder.
2,3-Butanedione (Diacetyl), the molecule implicated in the disease known as popcorn lung, has now been implicated in amyloid-β peptide toxicity associated with Alzheimer holmium disease. Diacetyl accelerate
s amyloid-β aggregation-a hallmark of Alzheimer holmium disease. These preliminary finding raise the possibility of long-term neurological toxicity mediated by DA.
content analysis determined by method 1 (hydroxylamine method) in aldehyde and ketone determination method (OT-7). The sample amount taken is 500mg. The equivalent factor (e) in the calculation is 21.52. It should be determined by non-polar column according to the GT-10-4.
toxicity ADI has not yet been specified (FAO/WHO,1994). GRAS(FEMA;FDA,§ 184.1278,2000).
use limit FEMA(mg/kg): soft drink 2.5; Cold drink 5.9; Candy 21; Baked food 44; Pudding 19; Gum candy 35; Shortening 11.
production method in nature, succinone is widely found in essential oils of many plants, such as iris oil, angelica oil, laurel oil, etc., which is the main component of butter and other natural products. Industrial production of diketone is obtained by treating methyl ethyl ketone with nitrous acid to produce butanone oxime, and then decomposing it with dilute sulfuric acid. Or use vinyl acetylene or methyl vinyl ketone to hydrate and reoxidize. The laboratory can use selenium dioxide to oxidize butanone to make it, and also use the method of reacting diketone dioxime with sodium nitrite.
It can be prepared by free method from essential oil with high content: 1 part of essential oil is added with 2 parts of phosphoric acid to generate crystalline adduct C4H6O2?2H3PO4, diacetyl is released after adding water. If phosphoric acid is added in excess, the adduct is liquid. It is obtained by special fermentation of glucose. It is synthesized with methyl ethyl ketone as the starting material. Butanone is oxidized with sodium nitrite in the presence of hydrochloric acid, hydrolyzed with sulfuric acid and distilled.
category flammable liquid
toxicity classification highly toxic
acute toxicity oral-rat LD50: 1580 mg/kg; Oral-mouse LD50: 250 mg/kg
stimulation data skin-rabbit 500 mg/24 hours moderate
flammability hazard characteristics flammability in case of open flame, high temperature and oxidant; Combustion produces stimulating smoke
storage and transportation characteristics warehouse ventilation and low temperature drying; separate from oxidant
fire extinguishing agent dry powder, dry sand, carbon dioxide, foam, 1211 fire extinguishing agent
spontaneous combustion temperature 365°C
toxic substance data information provided by: pubchem.ncbi.nlm.nih.gov (external link)
Last Update：2024-04-10 22:29:15
2,3-Butanedione
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　　　　 info@tnjchem.com
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View History
2,3-Butanedione
Raw Materials for 2,3-Butanedione
2-Butanone
Sulfuric acid
Sulfuric acid
Sodium nitrite
Ethyl Alcohol
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