2,3-Butanedione
- CAS Number:431-03-8
- Molecular Formula:C4H6O2
- Molecular Weight:86.0904
- Mol File:431-03-8.mol
Synonyms:Biacetyl,Diacetyl;2,3-Butanedione;2,3-Diketobutane;Dimethylglyoxal;
Physicochemical Properties
- Melting Point:-4--2 °C
- Boiling Point:88 °C at 760 mmHg
- Density:0.969 g/cm3
- Solubility:200g/l
- Flash Point:5.5 °C
- Vapor Density:3 (vs air)
- Refractive Index:n20/D 1.394(lit.)
- Sensitive:N/A
- Storage Temp.:2-8°C
- Appearance/Colour:liquid with a butter-like odour
F, 
Xn2,3-Butanedione Safety information and MSDS
·Hazard identification:
| Pictogram(s) |     |
|---|---|
| Signal word | Danger |
| Hazard statement(s) | H225 Highly flammable liquid and vapour H302 Harmful if swallowed H315 Causes skin irritation H317 May cause an allergic skin reaction H318 Causes serious eye damage H331 Toxic if inhaled H373 May cause damage to organs through prolonged or repeated exposure |
| Precautionary statement(s) | |
| Prevention | P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking. P233 Keep container tightly closed. P240 Ground and bond container and receiving equipment. P241 Use explosion-proof [electrical/ventilating/lighting/...] equipment. P242 Use non-sparking tools. P243 Take action to prevent static discharges. P280 Wear protective gloves/protective clothing/eye protection/face protection. P264 Wash ... thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P272 Contaminated work clothing should not be allowed out of the workplace. P271 Use only outdoors or in a well-ventilated area. P260 Do not breathe dust/fume/gas/mist/vapours/spray. |
| Response | P303+P361+P353 IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water [or shower]. P370+P378 In case of fire: Use ... to extinguish. P301+P312 IF SWALLOWED: Call a POISON CENTER/doctor/…if you feel unwell. P330 Rinse mouth. P302+P352 IF ON SKIN: Wash with plenty of water/... P321 Specific treatment (see ... on this label). P332+P313 If skin irritation occurs: Get medical advice/attention. P362+P364 Take off contaminated clothing and wash it before reuse. P333+P313 If skin irritation or rash occurs: Get medical advice/attention. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P310 Immediately call a POISON CENTER/doctor/… P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P311 Call a POISON CENTER/doctor/… P314 Get medical advice/attention if you feel unwell. |
| Storage | P403+P235 Store in a well-ventilated place. Keep cool. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P405 Store locked up. |
| Disposal | P501 Dispose of contents/container to ... |
·Composition/information on ingredients:
| Chemical name | Common names and synonyms | CAS number | EC number | Concentration |
|---|---|---|---|---|
| butane-2,3-dione | butane-2,3-dione | 431-03-8 | none | 100% |
·First-aid measures:
General adviceConsult a physician. Show this safety data sheet to the doctor in attendance.If inhaled Fresh air, rest. Refer for medical attention. In case of skin contact Remove contaminated clothes. Rinse skin with plenty of water or shower. In case of eye contact First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. If swallowed Rinse mouth. Give one or two glasses of water to drink. Seek medical attention if you feel unwell. Excerpt from ERG Guide 127 [Flammable Liquids (Water-Miscible)]: 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. (ERG, 2016) Immediate First Aid: Ensure that adequate decontamination has been carried out. If patient is not breathing, start artificial respiration, preferably with a demand-valve resuscitator, bag-valve-mask device, or pocket mask, as trained. Perform CPR if necessary. Immediately flush contaminated eyes with gently flowing water. Do not induce vomiting. If vomiting occurs, lean patient forward or place on left side (head-down position, if possible) to maintain an open airway and prevent aspiration. Keep patient quiet and maintain normal body temperature. Obtain medical attention.
·Fire-fighting measures:
Suitable extinguishing media Suitable extinguishing media: For small (incipient) fires, use media such as "alcohol" foam, dry chemical, or carbon dioxide. For large fires, apply water from as far as possible. Use very large quantities (flooding) of water applied as a mist or spray; solid streams of water may be ineffective. Cool all affected containers with flooding quantities of water. Excerpt from ERG Guide 127 [Flammable Liquids (Water-Miscible)]: 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. Those substances designated with a (P) may polymerize explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water. (ERG, 2016) Wear self-contained breathing apparatus for firefighting if necessary.
·Accidental release measures:
Use personal protective equipment. Avoid dust formation. Avoid breathing vapours, mist or gas. Ensure adequate ventilation. Evacuate personnel to safe areas. Avoid breathing dust. For personal protection see section 8. Remove all ignition sources. Personal protection: filter respirator for organic gases and vapours adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Collect leaking liquid in covered containers. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations. ACCIDENTAL RELEASE MEASURES: Personal precautions, protective equipment and emergency procedures: Wear respiratory protection. Avoid breathing vapors, mist or gas. Ensure adequate ventilation. Remove all sources of ignition. Evacuate personnel to safe areas. Beware of vapors accumulating to form explosive concentrations. Vapors can accumulate in low areas. Environmental precautions: Prevent further leakage or spillage if safe to do so. Do not let product enter drains. Methods and materials for containment and cleaning up: Contain spillage, and then collect with an electrically protected vacuum cleaner or by wet-brushing and place in container for disposal according to local regulations.
2,3-Butanedione Relevant articles
All total 158 Articles be found
All total 158 Articles be foundSol-gel synthesis of ceria-zirconia-based high-entropy oxides as high-promotion catalysts for the synthesis of 1,2-diketones from aldehyde
Dinjar, Kristijan,Djerdj, Igor,Koj?inovi?, Jelena,Kukovecz, ákos,Markovi?, Berislav,Mileti?, Aleksandar,Nagy, Sándor Balázs,Sapi, Andras,Stenzel, David,Széchenyi, Aleksandar,Szenti, Imre,Tang, Yushu,Tatar, Dalibor,Varga, Gábor,Ziegenheim, Szilveszter
, (2021/10/20)
Efficient Lewis-acid-catalyzed direct conversion of aldehydes to 1,2-diketones in the liquid phase was enabled by using newly designed and developed ceria–zirconia-based high-entropy oxides (HEOs) as the actual catalysts. The synergistic effect of various cations incorporated in the same oxide structure (framework) was partially responsible for the efficiency of multicationic materials compared to the corresponding single-cation oxide forms. Furthermore, a clear, linear relationship between the Lewis acidity and the catalytic activity of the HEOs was observed. Due to the developed strategy, exclusively diketone-selective, recyclable, versatile heterogeneous catalytic transformation of aldehydes can be realized under mild reaction conditions.
METHOD FOR THE HYDRODEOXYGENATION OF OXYGENATED COMPOUNDS TO UNSATURATED PRODUCTS
-
Page/Page column 10, (2021/01/23)
The invention relates to methods of hydrodeoxygenation of oxygenated compounds into compounds with unsaturated carbon-carbon bonds, comprising the steps of: a) providing a reaction mixture comprising, an oxygenated compound containing one or more of a hydroxyl, keto or aldehyde group, an ionic liquid, a homogeneous metal catalyst, and carbon monoxide or a carbon monoxide releasing compound, b) reacting said reaction mixture under a H2 atmosphere at acidic conditions at a temperature between 180 and 250 °C and a pressure between 10 and 200 bar.
Efficient production of adipic acid from 2-methoxycyclohexanone by aerobic oxidation with a phosphotungstic acid catalyst
Hatakeyama, Kosuke,Nakagawa, Yoshinao,Tamura, Masazumi,Tomishige, Keiichi
, p. 4962 - 4974 (2020/08/25)
Oxidative cleavage reaction of 2-methoxycyclohexanone (2-MCO) to adipic acid (AA) and methanol with O2 in water solvent was investigated. 2-MCO and AA are one of the lignin-based compounds produced via hydrogenation of guaiacol and an important monomer in industry, respectively. Various vanadium compounds and heteropolyacids were tested as homogeneous catalysts because vanadium compounds, especially phosphomolybdovanadic acids, have been known to be active in various oxidative cleavage reactions with O2. Simple vanadium-free phosphotungstic acid (H3PW12O40), which has not been regarded as an oxidation catalyst using O2 as the oxidant, showed good catalytic activity and excellent selectivity to AA. The carbon-based AA yield reached 74% (86% in molar basis) and this value was higher than those obtained with vanadium-based catalysts. A reuse test and 31P NMR confirmed that the H3PW12O40 catalyst was stable and reusable. Kinetic studies and the reaction test using a radical inhibitor suggested that the reaction mechanism is not auto-oxidation involving free radicals. Instead, the substrate was first activated by one-electron oxidation by H3PW12O40 catalyst and then reacted with O2.
Bioinspired oxidation of oximes to nitric oxide with dioxygen by a nonheme iron(II) complex
Bhattacharya, Shrabanti,Lakshman, Triloke Ranjan,Sutradhar, Subhankar,Tiwari, Chandan Kumar,Paine, Tapan Kanti
, p. 3 - 11 (2019/11/11)
The ability of two iron(II) complexes, [(TpPh2)FeII(benzilate)] (1) and [(TpPh2)(FeII)2(NPP)3] (2) (TpPh2 = hydrotris(3,5-diphenylpyrazol-1-yl)borate, NPP-H = α-isonitrosopropiophenone), of a monoanionic facial N3 ligand in the O2-dependent oxidation of oximes is reported. The mononuclear complex 1 reacts with dioxygen to decarboxylate the iron-coordinated benzilate. The oximate-bridged dinuclear complex (2), which contains a high-spin (TpPh2)FeII unit and a low-spin iron(II)–oximate unit, activates dioxygen at the high-spin iron(II) center. Both the complexes exhibit the oxidative transformation of oximes to the corresponding carbonyl compounds with the incorporation of one oxygen atom from dioxygen. In the oxidation process, the oxime units are converted to nitric oxide (NO) or nitroxyl (HNO). The iron(II)–benzilate complex (1) reacts with oximes to afford HNO, whereas the iron(II)–oximate complex (2) generates NO. The results described here suggest that the oxidative transformation of oximes to NO/HNO follows different pathways depending upon the nature of co-ligand/reductant.
A study on the cataluminescence of propylene oxide on FeNi layered double hydroxides/graphene oxide
Li, Ming,Hu, Yufei,Li, Gongke
, p. 11823 - 11830 (2021/07/11)
In this work, FeNi layered double hydroxides/graphene oxide (FeNi LDH/GO) was prepared, which exhibits excellent selective cataluminescent performance towards propylene oxide. The selectivity and sensitivity of the cataluminescence (CTL) reaction were investigated in detail. Moreover, the catalytic reaction mechanism, including the intermediate products and the conversion of reactants to products, was discussed based on both the experimental and computational results. Furthermore, the proposed FeNi LDH/GO based CTL sensor was successfully applied for the determination of propylene oxide residue in fumigated raisins, which indicates extensive application potential for rapid food safety evaluation.
2,3-Butanedione Synthetic route And Reaction conditions
| Conditions | Yield |
|---|---|
Withsulfuric acid;
mercury(II) sulfate;beim Erhitzen des Reaktions-gemisches mit Salzsaeure auf 90-100grad; | |
Withsulfuric acid;
mercury(II) sulfate;beim Erhitzen des Reaktions-gemisches mit Salzsaeure auf 90-100grad; |
| Conditions | Yield |
|---|---|
Withsodium hydroxide;
water;
sodium nitrite;
at 0 ℃;
ueber mehrere Stufen; |
- 31329-64-3
3,5-dimethylisoxazol-4-amine
![1-(5-methyl-1<i>H</i>-[1,2,3]triazol-4-yl)-ethanone](/Databaselist/images/loading.webp)
- 32907-47-4
1-(5-methyl-1H-[1,2,3]triazol-4-yl)-ethanone
- 431-03-8
dimethylglyoxal
| Conditions | Yield |
|---|---|
Withsulfuric acid;
sodium nitrite;Erwaermen der Reaktionsloesung mit CuSO4+5H2O und wss.H2SO4; |
- 56-23-5
tetrachloromethane
- 107-01-7
butene-2
- 509-14-8
tetranitromethane
- 75-07-0,9002-91-9
acetaldehyde
- 64-19-7,77671-22-8
acetic acid
- 431-03-8
dimethylglyoxal
| Conditions | Yield |
|---|---|
- 50-00-0,30525-89-4,61233-19-0
formaldehyd
- 431-03-8
dimethylglyoxal
| Conditions | Yield |
|---|---|
Withwater;
magnesium oxide;
under 1520 Torr; |
| Conditions | Yield |
|---|---|
Withdiethyl ether;
magnesium;nachfolgenden Zersetzen des Reaktionsprodukts mit Wasser; |
| Conditions | Yield |
|---|---|
kondensiert sich; | |
| Conditions | Yield |
|---|---|
beim Behandeln mit verduennten Mineralsaeuren; |
| Conditions | Yield |
|---|---|
Withsulfuric acid;
water; |
| Conditions | Yield |
|---|---|
beim Ozonisieren; |
2,3-Butanedione Raw materials
2,3-Butanedione Target Products
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Certificate:
- Product LicenseEnterprise AuthenticationISOGMPFDAHALAL
Country :
China (Mainland)(172)
United Arab Emirates(2)
United States(2)
United Kingdom(1)
Germany(1)
